Linear Technology Battery Management Solutions User Manual

VOL 5

Battery
Management
Solutions

High Performance Analog ICs

B AT TE RY M AN A G E ME N T SO L UT I O N S

Linear Technology’s high performance battery management ICs

enable long battery life and run time, while providing precision charging control, constant

status monitoring and stringent battery protection. Our proprietary design techniques seamlessly

manage multiple input sources while providing small solution footprints, faster charging and

100% standalone operation. Battery and circuit protection features enable improved thermal

performance and high reliability operation.

Each battery chemistry has unique charging requirements. Selecting the correct battery charger

increases the operational run time of the end product, ensuring that the battery is always

optimally charged. This guide contains the essential technical criteria to easily identify the

optimum battery charging IC for 1-cell to multiple-cell configurations, regardless of chemistry.

Data sheets for our complete battery management product portfolio, including our latest

product releases, are available for download at

www.linear.com.

Contents/Block Diagrams

TYPE PA GE TOPOLOGY BAT T E R Y CHEMISTRY

Linear

USB Compatible Battery Chargers

...............................................5-8

“X” Series–Fast Charge Depleted Batteries (No Trickle Charge)

4.2V Float Voltage (1- and 2-Cell) Battery Chargers

4.1V Float Voltage Battery Chargers

Coin Cell/Low Current Battery Chargers

Nickel Battery Chargers

................................................................ 9

............................................. 7

....................................... 8

...................... 5, 6

Linear Charger + Regulators

Battery Chargers with Onboard Regulators or Comparators

......... 6, 13

..... 5, 6, 8

V

IN

V

IN

LINEAR

CHARGER

LINEAR

CHARGER

AND

REGULATOR

T

+

BAT

V

V

BAT

OUT1

OUT2

T

+

Lithium-Ion/Polymer

NiMH/NiCd

Lithium-Ion/Polymer

Power Managers (BAT Decoupled from V

4.1V Float Voltage Power Managers

Linear Power Managers

................................................................ 10

Switch Mode Power Managers

Controller Power Managers

..........................................................19

............................................. 7, 10

..................................................... 10

OUT

)

WALL

USB

POWER MANAGER

T

SYSTEM
LOAD

+

BAT

Lithium-Ion/Polymer

LiFePO

4

Visit www.linear.com for our complete product offering.

B AT TE RY M AN A G E ME N T SO L UT I O N S

TYPE PA GE TOPOLOGY BAT T E R Y CHEMISTRY

Power Management Integrated Circuits (PMICs)

4.1V Float Voltage PMICs

.......................................................... 7

Switch Mode Power Manager-Based PMICs

Linear Power Manager-Based PMICs

Battery-Fed PMICs

.................................................................... 13

........................................ 12

............................. 11

USB/WALL

4.35V TO 5.5V

ENABLE

CONTROLS

TO OTHER
LOADS

+

BAT

T

3.3V/25mA

RTC/LOW

5

PMIC

0.8V TO 3.6V/400mA

0.8V TO 3.6V/400mA

0.8V TO 3.6V/1A

RST

2

POWER LOGIC

MEMORY

I/O

CORE

µPROCESSOR

2

I

C

Lithium-Ion/Polymer

Switch Mode – Monolithic

Switch Mode Buck Battery Chargers

......................................... 9, 14

Switch Mode Buck-Boost Battery Chargers

.............................. 15

SWITCHING

V

IN

MONOLITHIC

CHARGER

+

T

Lithium-Ion/Polymer

LiFePO

BAT

NiMH/NiCd

Lead-Acid

Multichemistry

4

1

Switch Mode

Switch Mode Buck Battery Charger Controllers

Switch Mode Buck-Boost Battery Charger Controllers

Switch Mode

Smart Battery Chargers

– Controller

......................... 14

.............. 15

– Smart Battery

............................................................. 16

Related Battery Management Products

Battery Backup System Managers .....................................15-16

Special Battery Management Function ICs........................17-24

Ideal Diodes/PowerPath™ Controllers

Supercapacitor Chargers

...................................................18

High Side and Low Side Current Sensing

Battery Stack Monitors for Hybrid/Electric

Vehicles and Battery Backup Systems...............................22-23

Battery Monitoring – Comparators & Voltage References ..24

Master Selector Guides

......................................................25-29

..............................17

..........................21

V

IN

SWITCHING

MONOLITHIC

CHARGER

T

+

BAT

Lithium-Ion/Polymer

LiFePO

4

NiMH/NiCd

Lead-Acid

Multichemistry

V

BAT

IN

SMART

BATTERY

++

CHARGER

• SPI

• SMBus

• I/O

Lithium-Ion/Polymer

LiFePO

4

NiMH/NiCd

Lead-Acid

Multichemistry

Lithium-Ion/Polymer

LiFePO

4

NiMH/NiCd

Lead-Acid

Multichemistry

Supercapacitor

T O P O L O GY OV E R V IE W — P OW E R PAT H C O NT R O L A N D B ATT ERY- F E D SY S TE M S

2

Battery-Fed (Charger-Fed) Systems

First generation USB system applications incorporated a current­limited battery charger directly between the USB port and the
battery (see Figure 1). In this battery-fed topology, the battery
directly powers the system and the power available to the system
from the USB can be expressed as:

= I

P

SYS

because V
linear chargers, input current approximately equals charge current,
so a simple current limit is sufficient. Connecting the system load
directly to the battery eliminates the need for a load sharing diode.
Disadvantages of this topology include low efficiency, 500mA
maximum charge current from the USB, no system power when the
battery voltage is low (i.e., a dead or missing battery), and loss of
nearly half of the available power within the linear battery charger
element as heat. Furthermore, an additional resistor and signal
transistor is required to increase charge current when a wall
adapter is present.

V

•

USB

BAT

is the only voltage available to the system load. For

BAT

AC ADAPTER

V

USB

Figure 1: Simplified Battery-Fed Control Circuit

IN

LINEAR

CC/CV

CHARGER

BAT

+

BAT

SYSTEM

LOAD

Linear PowerPath Power Managers

Second generation USB charging systems, commonly referred to
as PowerPath systems, develop an intermediate voltage between
the USB port and the battery (see Figure 2). In PowerPath systems,
the USB port supplies current to an intermediate voltage, V
current-limited switch. V

powers both the linear battery charger

OUT

and the system load with priority going to the system load. By
decoupling the battery from the system load, charging can be car­ried out opportunistically. PowerPath systems also offer instant-on
operation because the intermediate voltage is available for system
loads as soon as power is applied to the circuit—this allows the end
product to operate immediately when plugged in, regardless of the
battery’s state of charge. In a linear PowerPath system, nearly all of

AC ADAPTER

USB

V

BUS

LINEAR USB

CURRENT LIMIT

LINEAR

CC/CV

CHARGER

OUT

, via a

IDEAL
DIODE

the 2.5W available from the USB port is accessible to the system
load provided the system load does not exceed the input current
limit. Furthermore, if the system requires more power than is available
from the input, an ideal diode also supplies current to the load
from the battery. Thus, a linear PowerPath system offers significant
advantages over a battery-fed system. But significant power may still
be lost, especially if the system load exceeds the input current limit
and the battery voltage is low, resulting in a large differential between
the input voltage and both the system voltage and the battery volt­age. An optional external PFET can reduce the ideal diode voltage
drop during heavy load conditions.

OUT

SYSTEM

LOAD

GATE

BAT

OPTIONAL:
AUGMENTS
INTERNAL
IDEAL DIODE

Figure 2: Simplified Linear Power Manager Circuit

+

BAT

Switch Mode PowerPath Power Managers

T O P O L O GY OV E R V IE W — P OW E R PAT H C O NT R O L A N D B ATT ERY- F E D SY S TE M S

3

Third generation USB charging systems feature a switch mode-based
topology (see Figure 3). This type of PowerPath device produces an
intermediate bus voltage from a USB-compliant step-down switching
regulator that regulates a small differential voltage above the battery
voltage. Linear Technology refers to this as Bat-Track™ adaptive
output control because the output voltage tracks the battery voltage.
The differential voltage between the battery and the system is large
enough to allow full charging through the linear charger, but small
enough to minimize power lost in the charger, thereby increasing
system efficiency and maximizing power available to the load. The
switching average input current limit allows the use of nearly all of
the 2.5W available from the USB port, independent of operating

AC ADAPTER

USB

V

BUS

SWITCHING
USB CURRENT LIMIT

LINEAR

CC/CV

CHARGER

conditions. By ensuring that the Bat-Track regulation loop does
not allow the output voltage to drop below 3.5V (even with severely
discharged batteries) this topology also provides instant-on func­tionality. As in linear PowerPath systems, an ideal diode allows the
battery to supplement input power during heavy load transients.
An optional external PFET can reduce the ideal diode voltage drop.
This architecture is suitable for systems with large (>1.5AHr) batteries
and high (>2W) system power.

SW

OUT

SYSTEM

LOAD

IDEAL
DIODE

GATE

BAT

+

OPTIONAL:
AUGMENTS
INTERNAL
IDEAL DIODE

BAT

Figure 3: Simplified Switch Mode Power Manager Circuit

T O P O L O GY OV E R V IE W — P OW E R PAT H C O NT R O L A N D B ATT ERY- F E D SY S TE M S

4

External High Voltage Switching Regulator Control

Several Linear Technology power manager ICs (both linear and
switching) provide the ability to adaptively control the output of an
external high voltage switching regulator (see Figure 4). The WALL
pin detects the presence of a high voltage supply (e.g., car battery,
12V wall adapter, FireWire input) and enables Bat-Track adaptive
output control via the buck regulator’s V

pin. Similar to a switching

C

PowerPath system, the output of the high voltage buck is regulated
to a small differential voltage above the battery voltage with a
minimum output voltage of approximately 3.5V. This functionality
maximizes charger efficiency while still allowing instant-on operation
even when the battery is deeply discharged. Compared to the

HV INPUT

USB

V

IN

HIGH VOLTAGE

HIGH VOLTAGE

BUCK REGULATOR

BUCK REGULATOR

V

C

C

CHARGER/POWER

V

BUS

MANAGER

SW

FB

ACPRWALLV

OUT

SYSTEM

LOAD

GATE

OPTIONAL:
AUGMENTS
INTERNAL
IDEAL DIODE

BAT

+

BAT

traditional approach of converting a high voltage input to 5V
to power the system, this technique can reduce system power

®

dissipation by over 50%. By choosing an LT

3653 as the high
voltage regulator, further system improvements can be made (see
Figure 5). The LT3653 accurately controls its maximum output current,
which eliminates the potential for localized heating, reduces the
required current rating of the power components and provides a
robust solution to withstand harsh overload and short circuit condi­tions. In addition, the unique LT3653 architecture eliminates a power
PFET and output capacitor from the application schematic.

SW

LT3653

HIGH VOLTAGE

HV INPUT

USB

BUCK REGULATOR

V

IN

V

V

BUS

I

SENSE

HVOK

C

WALLV

C

CHARGER/POWER

MANAGER

V

OUT

ACPR

OUT

SYSTEM

LOAD

GATE

OPTIONAL:

AUGMENTS

INTERNAL

IDEAL DIODE

BAT

+

BAT

Figure 4: Simplified HV Switching Regulator Control Circuit

Figure 5: Simplified LT3653 Control Circuit

Attribute Battery-Fed Linear PowerPath Switch Mode PowerPath

Table 1: Comparison of USB-Compliant Battery Charging System Topologies

Size Small Moderate Larger

Complexity Simple Moderate More Complex

Solution Cost Low Moderate Higher

USB Charge Current Limited to 500mA Limited to 500mA 500mA and Higher (~2.3W)

Autonomous Control of Input Power

No Yes Yes

Sources

Instant-On Operation No Yes Yes

System Load Efficiency

<USB Limit)

(I

BUS

System Load Efficiency (I

>USB Limit) Good (V

SYS

Good (V

Battery Charger Efficiency Good (V

) Exceptional (>90%) Excellent (~90%)

BAT/VBUS

) Good (V

BAT/VBUS

) Good (V

BAT/VBUS

) Excellent (~90%)

BAT/VBUS

) Excellent (~90%)

BAT/VBUS

Power Dissipation High Moderate Low

Bat-Track Adaptive Output Control/

No Yes Yes

Interface to HV Buck

L i t h iu m- Io n/ Po ly me r

Linear Li-Ion/Polymer Battery Chargers

We produce a comprehensive line of high performance battery
chargers for any rechargeable battery chemistry, including lithium-ion,
lithium-polymer, lead acid, and nickel-based. Our linear battery
charger ICs are completely autonomous in operation and offer many
standard features for battery safety and management, including
on-chip battery preconditioning, status signaling, thermal regulation
and NTC thermistor interface.

L i - I O N /P O LY M ER BAT TE R Y CH A R G ER S

5

LTC®4095: USB Li-Ion/Polymer Battery Charger in 2mm x 2mm DFN

INPUT

4.3V TO 5.5V
UP TO 7V

TRANSIENTS

500mA Single Cell Li-Ion Charger

IN

LTC4095

SUSP

GND

CHRGHPWR

PROG

BAT

NTC

R

PROG

1.74k

+

Li-Ion

LTC4078/X: Dual Input Li-Ion/Polymer Battery Charger with Overvoltage Protection

2k
1%

800mA (WALL)

500mA (USB)

+

3.9k

Li-Ion

WALL

ADAPTER

USB

PORT

2k
1%

1.24k
1%

LTC4078/X

DCIN

USBIN

IUSB

IDC

BAT

BATDET

ITERM

GND

LTC4095:

Actual Size
Demo Circuit

High Voltage Dual Input Battery Charger for Li-Ion Battery Pack

L i - I O N /P O LY M ER BAT TE R Y CH A R G ER S

6

L i t h iu m- Io n/ Po ly me r

Part Number

Number of Battery
Cells (Series)

Maximum Charge
Current (A)

Input Voltage
(V) Cell Type

Integrated
Power Transistor

Charge Termination
(Plus Indication)

Package
(mm x mm)

Linear Li-Ion/Polymer Battery Chargers

LTC4054L 1 0.15 4.25 to 6.5 Li-Ion/Poly

~

C/10 ThinSOT

™

LTC1734L 1 0.18 4.55 to 8 Li-Ion/Poly External External μC ThinSOT

LTC4065L/X 1 0.25 3.75 to 5.5 Li-Ion/Poly

LTC4080*/X*

¶

1 0.5 3.75 to 5.5 Li-Ion/Poly

LTC4081* 1 0.5 3.75 to 5.5 Li-Ion/Poly

~

~

~

Timer + C/10 2x2 DFN-6

Timer + C/10 3x3 DFN-10, MSOP-10E

Timer + C/10 3x3 DFN-10

LTC4056* 1 0.7 4.5 to 6.5 Li-Ion/Poly External Timer ThinSOT

LTC1734 1 0.7 4.55 to 8 Li-Ion/Poly External External μC ThinSOT

LTC4065* 1 0.75 3.75 to 5.5 Li-Ion/Poly

LTC4065-4.4* 1 0.75 3.75 to 5.5 Li-Ion/Poly

LTC4065A* 1 0.75 3.75 to 5.5 Li-Ion/Poly

LTC4069* 1 0.75 3.75 to 5.5 Li-Ion/Poly

LTC4069-4.4* 1 0.75 3.75 to 5.5 Li-Ion/Poly

LTC4054*/X*

¶

1 0.8 4.25 to 6.5 Li-Ion/Poly

LTC4057* 1 0.8 4.25 to 6.5 Li-Ion/Poly

LTC4059* 1 0.9 3.75 to 8 Li-Ion/Poly, Ni

LTC4059A* 1 0.9 3.75 to 8 Li-Ion/Poly, Ni

LTC4058*/X*

LTC4068*/X*

LTC4075*/X*

LTC4075HVX*

LTC4078*/X*

¶

¶

¶

¶

¶

1 0.95 4.25 to 6.5 Li-Ion/Poly

1 0.95 4.25 to 6.5 Li-Ion/Poly

1 0.95 4.3 to 8 Li-Ion/Poly

1 0.95 4.3 to 6, 22 max Li-Ion/Poly

1 0.95 4.3 to 6, 22 max Li-Ion/Poly

LTC4076* 1 0.95 4.3 to 8 Li-Ion/Poly

LTC4077* 1 0.95 4.3 to 8 Li-Ion/Poly

LTC3550-1* 1 0.95 4.3 to 8 Li-Ion/Poly

LTC3550* 1 0.95 4.3 to 8 Li-Ion/Poly

LTC3552-1* 1 0.95 4.25 to 8 Li-Ion/Poly

LTC3552* 1 0.95 4.25 to 8 Li-Ion/Poly

LTC4095* 1 0.95 4.3 to 5.5 Li-Ion/Poly

LTC4064* 1 1.0 4.25 to 6.5 Li-Ion/Poly

LTC4061* 1 1.0 4.5 to 8 Li-Ion/Poly

LTC4061-4.4* 1 1.0 4.5 to 8 Li-Ion/Poly

LTC4062*

LTC4063*

†

§

LTC4096*/X*

¶

1 1.0 4.3 to 8 Li-Ion/Poly

1 1.0 4.3 to 8 Li-Ion/Poly

1 1.2 4.25 to 5.5 Li-Ion/Poly

LTC4097* 1 1.2 4.25 to 5.5 Li-Ion/Poly

LTC4053* 1 1.25 4.25 to 6.5 Li-Ion/Poly

LTC4052

#

1 1.3 4.5 to 10 Li-Ion/Poly

LTC1733 1 1.5 4.5 to 6.5 Li-Ion/Poly

~

~

~

~

~

~

~

‡

‡

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

~

Timer + C/10 2x2 DFN-6

Timer + C/10 2x2 DFN-6

Timer + C/10 2x2 DFN-6

Timer + C/10 2x2 DFN-6

Timer + C/10 2x2 DFN-6

C/10 ThinSOT

External μC ThinSOT

External μC 2x2 DFN-6

External μC 2x2 DFN-6

C/10 3x3 DFN-8

C/x 3x3 DFN-8

C/x 3x3 DFN-10

C/x 3x3 DFN-10

C/x 3x3 DFN-10

C/x 3x3 DFN-10

C/10 3x3 DFN-10

C/x 3x5 DFN-16

C/x 3x5 DFN-16

C/x 3x5 DFN-16

C/x 3x5 DFN-16

Timer + C/10 2x2 DFN-8

Timer + C/10 MSOP-10E

Timer + C/x

3x3 DFN-10

Timer + C/x 3x3 DFN-10

Timer + C/x 3x3 DFN-10

Timer + C/x 3x3 DFN-10

C/x 3x3 DFN-10

C/x 2x3 DFN-12

Timer + C/10 3x3 DFN-10, MSOP-10E

Timer + C/10 MSOP-8E

Timer + C/10 MSOP-10E

LTC1731 1, 2 1.5 4.5 to 12 Li-Ion/Poly External Timer + C/10 MSOP-8, S0-8

‡

LTC1732 1, 2 1.5 4.5 to 12 Li-Ion/Poly, Ni

* USB 2.0 Compatible,

#

Pulse Charger

†

Onboard Comparator, ‡ Constant-Current Mode (Voltage Mode Disabled), § Onboard LDO, ¶ “X” (No Trickle Charge) Versions Useful when the System Load Exceeds the Trickle Charge Current at Very Low Battery Voltages

External Timer + C/10 MSOP-10

L i t h iu m- Io n/ Po ly me r

4 . 1 V BAT TE R Y FL O AT V O LTAG E

4.1V/Cell Battery Float Voltage

Our 4.1V per cell float voltage chargers improve battery life and high temperature safety margin by accurately charging the battery to a level
slightly below full charge.

7

Part Number

Number of
Battery Cells
(Series)

Maximum
Charge
Current (A)

Input
Voltage (V)

Battery Charger
Type

USB 2.0
Compatible

Interface
to High Voltage
Buck

PowerPath
Control

Integrated DC/DC
Converters

Package
(mm x mm)

Linear and Switch Mode Battery Chargers, Power Managers, Smart Battery Chargers and PMICs —4.1V/Cell Float Voltage

¶

LTC4070 1 0.05

Unlimited Shunt – – – – 2x3 DFN-8, MSOP-8E

LTC4071 1 0.05 Unlimited Shunt – – – – 2x3 DFN-8, MSOP-8E

LTC3455-1 1 0.5 2.7 to 5.5 Linear

LTC1734-4.1 1 0.7 4.55 to 8 Linear

LTC3559-1 1 0.95 4.3 to 5.5 Linear

LTC4055-1 1 1 4.3 to 5.5 Linear

LTC4064 (4.0V) 1 1 4.25 to 6.5 Linear

LTC4089-1 1 1.2 6 to 36 Linear

‡

LTC1733

1 1.5 4.5 to 6.5 Linear

LTC4066-1 1 1.5 4.3 to 5.5 Linear

LTC4085-1 1 1.5 4.35 to 5.5 Linear

LTC3557-1 1 1.5 4.35 to 5.5 Linear

LTC3577-1/-4 1 1.5 4.35 to 5.5 Linear

~

~

~

~

~

~

~

~

~

~ ~ ~

~ ~ ~

–

2 Bucks 4x4 QFN-24

~

– – – ThinSOT

– – 2 Bucks 3x3 QFN-16

–

~

– 4x4 QFN-16

– – – MSOP-10E

–

~

– 3x6 DFN-22

– – – MSOP-10E

–

–

~

~

–

– 3x4 DFN-14

4x4 QFN-24, 4x4 QFN-24

3 Bucks, 1 LDO 4x4 QFN-28

3 Bucks, 2 LDOs,

4x7 QFN-44

10-LED Boost

LTC3576-1 1 1.5 4.35 to 5.5 Bat-Track Linear

LTC3555-3 1 1.5 4.35 to 5.5 Bat-Track Linear

LTC3586-1 1 1.5 4.35 to 5.5 Bat-Track Linear

~ ~ ~

~

~

–

–

3 Bucks, 1 LDO 4x6 QFN-38

3 Bucks, 1 LDO 4x5 QFN-28

~

1 Boost,

~

4x6 QFN-38
1 Buck-Boost,
2 Bucks, 1 LDO

LTC4098-1 1 1.5 4.35 to 5.5 Bat-Track Linear

LTC4099* 1 1.5 4.35 to 5.5 Bat-Track Linear

LTC4160-1 1 1.5 4.35 to 5.5 Bat-Track Linear

~ ~ ~

~ ~ ~

~

–

~

– 3x4 QFN-20

– 3x4 QFN-20

– 3x4 QFN-20

LTC1731-4.1 1 2 4.5 to 12 Linear – – – – MSOP-8/SO-8

LTC1731-8.2 2 2 4.5 to 12 Linear – – – – MSOP-8/SO-8

LTC1732-4

1, 2 2 4.5 to 12 Linear – – – – MSOP-10

LTC4050-4.1/8.2 1 2 4.5 to 12 Linear – – – – MSOP-10

LTC4001-1 1 2 4 to 5.5 Switch Mode – – – – 4x4 QFN-16

§

LT3650-4.1

LTC1980

LTC4110

/8.2#1, 2 2 4.75 to 32 Switch Mode – – – – 3x3 DFN-12, MSOP-12E

†

†

*

1, 2 2 4.1 to 12 Switch Mode – – – – SSOP-24

1–4 3 6 to 20 Switch Mode/

– –

~

– 5x7 QFN-38

Flyback

LTC4155 1 3.5 4.35 to 5.5 Switch Mode

~

–

~

– 4x5 QFN-28

LT3651-4.1 1 4 4.8 to 32 Switch Mode – – – – 5x6 QFN-36

LT3651-8.2 2 4 9 to 32 Switch Mode – – – – 5x6 QFN-36

§

LT3652/HV 1–3/1–4 2 4.95 to 32

LTC4007/-1 3, 4 4 6 to 28 Switch Mode – –

†

LTC4100

LTC4101

LTC4008

LTC4009

LTC4012

LTC1760

LTC1960

* I

*

†

*

†

†

/-1 1–4 4 6 to 28 Switch Mode – – – – 4x4 QFN-20

†

/-1/-3 1–4 4 6 to 28 Switch Mode – –

†

*

†

*

2

C Controlled, † Programmable, ‡ SEL Pin = OV Programs for 4.1V or 4.2V, § 7.5V Start-up Voltage for 1-Cell Operation, # 11.5V Start-up Voltage, ¶ 500mA with External PFET

2–6 4 6 to 28 Switch Mode – –

1 4 6 to 28 Switch Mode – –

2–6 4 6 to 28 Switch Mode – –

2–6 4 6 to 28 Switch Mode – –

2–6 8 6 to 28 Switch Mode – –

Switch Mode – – – – 3x4 DFN-12, MSOP-12E

~

~

~

~

~

~

~

– SSOP-24

– SSOP-24

– SSOP-24

– SSOP-20

– 4x4 QFN-20

– TSSOP-48

– 5x7 QFN-38, SSOP-36

L O W CU R R E NT / C O IN CE L L BAT TE RY C H A RG E R S

8

Low Current/Coin Cell Battery Chargers

L i t h iu m- Io n/ Po ly me r

Our coin cell battery chargers enable highly accurate charging of low
capacity, charge-sensitive coin cells used in thin, compact devices
such as Bluetooth headsets and hearing aids.

LTC4054L: 150mA Standalone Li-Ion Battery Charger for
Coin Cells

V

IN

4.5V TO 6.5V

1µF

90mA Li-Ion Coin Cell Charger

100

90

CONSTANT

80

CURRENT

70

60

50

40

30

CHA RGE C URREN T (mA)

LTC4054L Complete Charge Cycle

20

10

0

0

= 5V

V

CC

= 130°C/W

O

JA

= 1.69k

R

PROG

= 25°C

T

A

0.25 0.75

0.5
TIM E (HO URS)

V

CC

LT4351

GND

PROG

CONSTANT

VOLTAGE

1.75

1.5

BAT

LTC4054L-4.2

1.25 2.25

1.0

2.0

1.69k

4.4

4.3

4.2

4.1

4.0

3.9

3.8

3.7

3.6

3.5

3.4

90mA

Li-Ion
COIN
CELL

BAT T E RY VO LTA GE ( V )

LTC4054L:

Actual Size
Demo Circuit

LTC4065L: 250mA Standalone Linear Li-Ion Battery Charger in
2mm x 2mm DFN

V

IN

4.3V TO 5.5V

Standalone Li-Ion Charger

110

100

90

CONSTANT
CURRENT

80

70

60

50

40

CHARGE CURRENT (mA)

30

20

V

CC

10

R

PROG

0

0

0.5

LTC4065L Complete Charge Cycle

= 5V

= 2k

1

R1
510

2

1.5
TIME (HOURS)

TERMINATION

2.5

V

CC

LTC4065L

CHRG

EN

CONSTANT
VOLTAGE

CHRG
TRANSITION

CHARGE

3 3.5 4

BAT

PROG

GND

4.5

4.3

4.1

3.9

3.7

3.5

3.3

100mA

BAT T E RY VO LTA GE ( V )

4.2V

+

Li-Ion
BATTERY

R3
2k

Part Number

Charge Current Range
(mA) Input Voltage (V)

Battery Charger
Type Standalone

Charge Termination
(Plus Indication)

Thermal
Regulation

Integrated
Power Transistor

Package
(mmx mm)

Coin Cell Li-Ion Battery Chargers

LTC4070 0.001-50

†

Unlimited Shunt

~ ~

–

~

2x3 DFN-8
MSOP-8E

LTC4071 0.001-50 Unlimited Shunt

~ ~

–

~

2x3 DFN-8
MSOP-8E

LTC4054L 10-150 4.25 to 6.5 Linear

~

C/10

~ ~

ThinSOT

LTC1734L 10-180 4.55 to 8 Linear – – – External ThinSOT

LTC4065L/LX

*

LTC4059/A 90-900 3.75 to 8 Linear – –

“X” (No Trickle Charge) Versions Useful when the System Load Exceeds the Trickle Charge Current at Very Low Battery Voltages, † 500mA with ext PFET

*

15-250 3.75 to 5.5 Linear

~

Timer + C/10

~ ~

~ ~

2x2 DFN-6

2x2 DFN-6

N i M H /N iC d

NiMH and NiCd Battery Chargers

N i M H & Ni C d BAT TE RY C H A RG E R S

9

Our nickel battery chargers reduce component count, speed design
and allow fast, accurate and reliable charging of both NiMH and
NiCd cells.

LTC4060: Standalone 2A Linear NiMH/NiCd Fast
Battery Charger

V

= 5V

IN

330Ω

“CHARGE”

NTC

698Ω

2-Cell, 2A Standalone NiMH Fast Charger with Optional
Thermistor and Charge Indicator

Part
Number Topology

SHDN

CHRG

NTC

LTC4060

PROG

ARCT

SEL0

SEL1

V

CC

ACP

SENSE

DRIVE

BAT

TIMER

CHEM

PAUSE

GND

Number
of Battery
Cells

*

(Series)

1.5nF

Maximum
Charge
Current
(A)

+

NiMH
BATTERY

Input
Voltage
(V) Charge Termination

LTC4011: High Efficiency 4A Standalone Switch Mode
Battery Charger with Analog INFET Control

2A NiMH Battery Charger

NiMH/NiCd Battery Chargers – Standalone

LTC4060 Linear 1 – 4 2 4.5 to 10 -dV, t, V, T –

LTC4010 Synchronous Step-Down 1 –16 4 4.5 to 34 -dV, dT/dt, T, t –

†

LTC4011

Synchronous Step-Down 1 –16 4 4.5 to 34 -dV, dT/dt, T, t –

LTC4060:

Actual Size
Demo Circuit

Integrated
Power
Transistor

LTC4011

End­of-Charge
Signal

AC
Present
Signal

~ ~ ~

~ ~ ~

~ ~ ~

Thermistor
Interface

LTC4011:

Actual Size
Demo Circuit

Package
(mm x mm)

3x5 DFN-16, TSSOP-16

TSSOP-16E

TSSOP-20E

NiMH/NiCd Battery Chargers – Non-Standalone

LT1512 SEPIC 1 – 12 0.8 2.4 to 29 External µC

LT1510 Step-Down 1 – 12 1 7 to 29 External µC

LT1513 SEPIC 1 – 12 1.6 2.4 to 29 External µC

LT1769 Step-Down 1 – 12 2 7 to 29 External µC

LT1511 Step-Down 1 – 12 3 7 to 29 External µC

LTC4008 Synchronous Step-Down 4– 14 4 6 to 28 External µC –

LTC4009/

Synchronous Step-Down 2 – 14 4 6 to 28 External µC –

-1/-2

LTC4012/

-1/-2/-3

Synchronous Step-Down 2 – 14 4 6 to 28 External µC –

†

LT1505 Synchronous Step-Down 1–12 8 6.7 to 26 External µC –

LTC1960 Step-Down 4–16 8 6 to 28 External µC, SPI –

~

~

~

~

~

NiMH/NiCd Battery Chargers – Smart Chargers (SMBus)

LTC4110 Synchronous Flyback up to 10 3 6 to 20 Smart Battery, External µC – –

LTC4100 Step-Down 1 –13 4 6 to 28 Smart Battery, External µC – –

LTC4101 Step-Down 2 –3 4 6 to 28 Smart Battery, External µC – –

LTC1759 Step-Down 1 –13 8 11 to 24 Smart Battery, External µC – –

Based on Maximum Cell Voltage of 1.8V, † Includes PowerPath Control

*

– – – SO-8

– – – SO-8, SSOP-16, SO-16

– – – DD Pak, TO-220

– – – TSSOP-20, SSOP-28

– – – SO-24

~ ~

~

~

~

–

~

~

~

– – SSOP-28

– – 5x7 QFN-38, SSOP-36

~ ~

~ ~

~ ~

~ ~

SSOP-28

– 4x4 QFN-20

– 4x4 QFN-20

5x7 QFN-38

SSOP-24

SSOP-24

SSOP-36

10

U S B PO W E R M A NA G E R S

USB Power Managers: Battery Chargers with PowerPath Control

L i t h iu m- Io n/ Po ly me r

L i F e PO

4

PowerPath products and architectures permit the load to be
powered from both V

and the battery, enabling shorter charge

IN

time, instant-on operation (even with a dead or missing battery)
and more flexibility for the portable device designer. Other key
features include standalone operation and thermal regulation.

LTC4098/-1: USB Power Manager with Overvoltage Protection

HV

INPUT

AUTOMOTIVE,

FIREWIRE, ETC.

INPUT

USB

3

TO µC

Overvoltage Protection

6.04k

LT3480

V

V

BUS

10µF

C

LTC4098/LTC4098-1

OVGATE

LTC4098/LTC4098-1

OVSENS

D0-D2

CLPROG PROG GNDSWBATSENS

0.1µF 3.01k 1k

WALL ACPR

V

IDGATE

3.3µH

OUT

BAT

Li-Ion

SYSTEM
LOAD

10µF

+

LTC4098:

Actual Size
Demo Circuit

LTC4090:

Actual Size
Demo Circuit

LTC4090: USB Power Manager with 2A
High Voltage Bat-Track Buck Regulator

USB ONLY
BAT ONLY

SW

HVOUT

HVPR

OUT

BAT

100k2k

HIGH (6V-36V)

VOLTAGE INPUT

5V WALL

ADAPTER

USB

59k

270pF

HVIN

IN

V

TIMER

V

V

C

R

T

40.2k

(TYP)

OUT

+ 0.3V

BAT

5V
5V

V

BAT

BOOST

LTC4090

CLPROG GND PROG

AVAILABLE INPUT

HV INPUT (LTC4090)

HV INPUT (LTC4090-5)

High Voltage USB Power Manager with Bat-Track Adaptive Output ControlHigh Efficiency USB/Automotive Power Manager with

1k

+

Li-Ion

SYSTEM
LOAD

Part
Number

Number of
Battery Cells
(Series)

Max Charge
Current from
Wall (A)

Max Charge
Current from
500mA USB (mA)

Input
Voltage (V)

Power
Manager
Topology

Charge
Termination
(Plus Indication) Ideal Diode RdsON

Package
(mm x mm)

USB Power Managers and Li-Ion/Polymer Linear Battery Chargers with PowerPath Control

*

LTC4055/-1

*

LTC4089

1 1 500 4.35 to 5.5 Linear Timer 200mΩ 4x4 QFN-16

1 1.2 500 4.35 to 5.5 USB,

Linear Timer + C/10 215mΩ, (<50mΩ Opt.) 3x6 DFN-22

6-36, 40 Max Wall

LTC4089-5 1 1.2 500 4.35 to 5.5 USB,

Linear Timer + C/10 215mΩ, (<50mΩ Opt.) 3x6 DFN-22

6-36, 40 Max Wall

LTC4089-1

1 1.2 500 4.35 to 5.5 USB,

Linear Timer + C/10 215mΩ, (<50mΩ Opt.) 3x6 DFN-22

†

*

6-36, 40 Max Wall

LTC4090

*

1 1.2 500 4.35 to 5.5 USB,

Linear Timer + C/10 215mΩ, (<50mΩ Opt.) 3x6 DFN-22

6-38, 60 Max Wall

LTC4090-5 1 1.2 500 4.35 to 5.5 USB,

Linear Timer + C/10 215mΩ, (50mΩ Opt.) 3x6 DFN-22

6-36, 60 Max Wall

LTC4067 1 1.25 500 4.35 to 5.5, 13 OVP Linear Timer + C/10 200mΩ, (<50mΩ Opt.) 3x4 DFN-12

LTC4066/-1

1 1.5 500 4.35 to 5.5,

Linear Timer + C/x 50mΩ 4x4 QFN-24

†

USB + Wall Inputs

LTC4085/-1

1 1.5 500 4.35 to 5.5,

Linear Timer + C/10 215mΩ, (<50mΩ Opt.) 3x4 DFN-14

†

USB + Wall Inputs

LTC4088/-1/-2*1 1.5 700 4.35 to 5.5 Switch Mode Timer + C/x 180mΩ, (<50mΩ Opt.) 3x4 DFN-14

LTC4098/-1

1 1.5 700 4.35 to 5.5 USB, 66 OVP,

Switch Mode Timer + C/x 180mΩ, (<50mΩ Opt.) 3x4 QFN-20

†

*

Wall = 5V Adapter or
Buck High-V

#

LTC4098-3.6

*

1 1.5 700 4.35 to 5.5 USB, 66 OVP,

Switch Mode Timer + C/x 180mΩ, (<50mΩ Opt.) 3x4 QFN-20
Wall = 5V Adapter or
Buck High-V

†§

*

LTC4160/-1

*

LTC4099

LTC4155*

LTC4156*

Bat-Track Adaptive Output Control, † 4.1V Cell Voltage, ‡ I2C Controlled, Selectable 4.1V/4.2V Float Voltage, § USB On-The-Go, # For 1-cell Lithium Iron Phosphate (LiFePO4) Batteries, ** I2C Controlled, Selectable Float Voltage

*

1 1.5 700 4.35 to 5.5 USB, 66 OVP Switch Mode Timer + C/x 180mΩ, (<50mΩ Opt.) 3x4 QFN-20

‡

1 1.5 700 4.35 to 5.5 USB, 66 OVP Switch Mode Timer + C/x 180mΩ, (<50mΩ Opt.) 3x4 QFN-20

§

** 1 3.5 700 4.35 to 5.5 USB, 77 OVP Switch Mode Timer + C/x 180mΩ 4x5 QFN-28

#§

** 1 3.5 700 4.35 to 5.5 USB, 77 OVP Switch Mode Timer + C/x 180mΩ 4x5 QFN-28

L i t h iu m- Io n/ Po ly me r

PMICs: Switch Mode Power Manager-Based

P M I C S

11

Our power management integrated circuits (PMICs) address
battery charging and multiple system power rail needs for
single-cell lithium-ion/polymer portable products. Switch mode
power management enables higher efficiency charging, less
heat dissipation and compatibility with wall adapter, USB and
high voltage power sources.

LTC3556: High Efficiency Switch Mode USB Power Manager +
Battery Charger + Dual Step-Down DC/DC + Buck-Boost + LDO

Features:

Power Manager

• High Efficiency Switching PowerPath Controller with Bat-Track

Adaptive Output Control

• Programmable USB or Wall Current Limit (100mA/500mA/1A)

• Full Featured Li-Ion/Polymer Battery Charger

• 1.2A Maximum Charge Current

• Internal 180mΩ Ideal Diode + External Ideal Diode Controller

Powers Load in Battery Mode

• Low No-Load Quiescent Current when Powered from BAT (<30µA)

DC/DCs

• Dual High Efficiency Step-Down DC/DCs (400mA/400mA I

• High Efficiency Buck-Boost DC/DC (1A I

• All Regulators Operate at 2.25MHz

• Dynamic Voltage Scaling on Two Buck Outputs

2

• I

C Control of Enables, MODE, Two V

• Low No-Load Quiescent Current: 20µA

• Always-On, 3.3V/25mA LDO

• Low Profile 4mm × 5mm 28-Pin QFN Package

OUT

Settings

OUT

)

OUT

)

Applications:

• HDD-Based MP3 Players, PDAs, PMPs

• PNDs, DMB/DVB-H; Digital/Satellite Radio

• Portable Industrial/Medical Products

• Universal Remotes, Photo Viewers

• Other USB-Based Handheld Products

LTC3556:

Actual Size
Demo Circuit

USB/WALL

4.5V TO 5.5V

CHARGE

ENALL

SEQ

2

I

C

USB COMPLIANT

STEP-DOWN
REGULATOR

CC/CV

BATTERY

CHARGER

LTC3556

DUAL HIGH EFFICIENCY

BUCKS

HIGH EFFICIENCY

I

2

C PORT

BUCK-BOOST

3

0V

T

ALWAYS ON LDO

1

2

3

High Efficiency PowerPath Manager, Dual Buck, Buck-Boost and LDO

700

600

500

BATTERY CHARGE CURRENT

EXTRA CURRENT
FOR FASTER CHARGING

500mA USB CURRENT LIMIT

400

300

CHARGE CURRENT (mA)

200

= 5V

V

BUS

100

5X MODE
BATTERY CHARGER PROGRAMMED FOR 1A

0

2.8

3.2

3

3.4

3.6

3.8

4.2

4

BATTERY VOLTAGE (V)

Battery Charge Current from USB

OPTIONAL

+

Li-Ion

0.8V TO 3.6V/400mA

0.8V TO 3.6V/400mA

2.5V to 3.3V/1A

PGOODALL

TO OTHER
LOADS

3.3V/25mA

RTC/LOW
POWER LOGIC

MEMORY
CORE
µP

HDD I/O

Input

Part Number

Number of
Regulators

Voltage
(V)

Buck(s)

)

(I

OUT

Buck-Boost
(I

)

OUT

Boost
(I

OUT

LDO(s)

)

(I

)

OUT

Switch Mode PowerPath Management Integrated Circuits (PMICs)

LTC3566 2 4.35 to 5.5 – 1A – 3.3V/25mA

LTC3567 2 4.35 to 5.5 – 1A – 3.3V/25mA

LTC3555/-1/-3

4 4.35 to 5.5 1A, 400mA

– – 3.3V/25mA

*

x 2

LTC3556 4 4.35 to 5.5 400mA x 2 1A – 3.3V/25mA

†

*

LTC3576/-1

4 4.35 to 5.5,

High-V, OVP

*

LTC3586/-1

4.1V Battery Float Voltage, † See Page 12 for Compatible High Voltage Buck Regulators

*

5 4.35 to 5.5 400mA x 2 1A 0.8A 3.3V/20mA

1A, 400mA
x 2

– – 3.3V/20mA

Li-Ion/ Polymer
Charger

~

~

~

~

~

~

Max
Charge
Current
(A)

Ideal
Diode Interface

Package
(mmx mm)

1.5 Int + Ext (Opt.) Simple 4x4 QFN-24

1.5 Int + Ext (Opt.) I2C 4x4 QFN-24

1.5 Int + Ext (Opt.) I2C 4x5 QFN-28

1.5 Int + Ext (Opt.) I2C 4x5 QFN-28

1.5 Int + Ext (Opt.) I2C 4x6 QFN-38

1.5 Int + Ext (Opt.) Simple 4x6 QFN-38

P M I C S

12

PMICs: Linear Power Manager-Based

L i t h iu m- Io n/ Po ly me r

Our power management integrated circuits (PMICs) address battery
charging and multiple system power rail needs in single-cell lithium­ion/polymer portable products. Linear power management allows
seamless transition and manages power flow between input power
sources such as a wall adapter, USB port, lithium battery and the
system load.

LTC3577/-1: Highly Integrated 6-Channel PMIC

Features:

• Full Featured Li-Ion Charger/PowerPath

Controller with Instant-On Operation

• High Temperature Battery Voltage

Reduction Improves Safety and
Reliability

• 1.5A Maximum Charge Current with

Thermal Limiting

• Pushbutton On/Off Control with

System Reset

• Dual 150mA Current Limited LDOs

• Triple Adjustable High Efficiency

Step-Down Switching Regulators
(600mA, 400mA, 400mA I

• 200mΩ Internal Ideal Diode Plus

OUT

)

External Ideal Diode Controller Provides
Low Loss Power Path from Battery

• Bat-Track Control for External HV

Buck DC/DCs

2

• I

C Adjustable SW Slew Rates for EMI

Reduction

• Overvoltage Protection for USB

(VBUS)/Wall Input

• Integrated 40V Series LED Driver

with 60dB Brightness and Gradation
Control via I

• Small 4mm × 7mm 44-Pin QFN

2

C

Package

Applications:

• PNDs, DMB/DVB-H; Digital/Satellite

Radio

• Portable Industrial/Medical Products

• Universal Remotes, Photo Viewers

• Other USB-Based Handheld Products

LTC3577:

Complete Solution

Solution Size =
22mm x 15mm

Actual Size,

90

85

80

75

70

EFFICIENCY (%)

65

60

55

50

0

LED Driver Efficiency (10 LEDS)

HIGH VOLTAGE

BUCK DC/DC

100mA/500mA

1000mA

CC/CV

CHARGER

LTC3577/LTC3577-1

2

I

LED BACKLIGHT WITH DIGITALLY

TRIPLE HIGH EFFICIENCY
STEP-DOWN SWITCHING

PUSHBUTTON CONTROL

DUAL LDO

C PORT

REGULATORS

CONTROLLED DIMMING

REGULATORS WITH

0V

NTC

USB

HV SUPPLY

OPTIONAL

OVERVOLTAGE

PROTECTION

CHARGE

PB

2

USB Plus HV Input Charger and Multichannel PMIC

5

I

LED

V

OUT

+

SINGLE CELL
Li-Ion

0.8V to 3.6V/150mA

0.8V to 3.6V/150mA

0.8V to 3.6V/600mA

0.8V to 3.6V/400mA

0.8V to 3.6V/400mA

10

(mA)

UP TO 10 LED
BOOST

V

OUT

3.8V

3.6V

3.4V

3.2V

20

15

Part Number

Number of
Regulators

Input
Voltage (V) Buck(s) (I

) LDO(s)

OUT

Li-Ion/
Polymer
Charger

Max
Charge
Current

PowerPath
Topology

Ideal
Diode Interface

Package
(mmx mm)

Linear PowerPath Management Integrated Circuits (PMICs)

LTC3553 2 4.35V to 5.5V 200mA 150mA

LTC3554 2 4.35V to 5.5V 200mA x 2 –

‡

LTC3455 3 2.7 to 5.5,

400mA, 600mA

Controller

500mA

~

500mA

~

500mA

~

~ ~

~ ~

~

– – 4x4 QFN-24

– 3x3 QFN-20

– 3x3 QFN-20

USB + Wall Inputs

LTC3557/-1

LTC3577/-3
LTC3577-1/-4

4 2.7 to 5.5, USB,

High-V Bat-Track (*)

#

6

§

2.7 to 5.5, USB,
High-V Bat-Track (*),

600mA, 400mA
x 2

800mA, 500mA
x 2

3.3V/25mA

2x150mA

1.5A

~

1.5A

~

~

~

Int + Ext (Opt.) – 4x4 QFN-28

Int + Ext (Opt.) – 4x7 QFN-44

§

OVP

LTC3677-3

6 2.7 to 5.5, USB,

High-V Bat-Track (*),

800mA, 500mA
x 2

2x150mA

1.5A

~

~

Int + Ext (Opt.) – 4x7 QFN-44

¶

OVP

See Table Below for Compatible High Voltage Buck Regulators, † Includes 50mA Hot Swap™ Controller, ‡ May be Increased to 1A with Additional Components, § 4.1V Battery Float Voltage, # Includes 10-LED Boost, ¶ No LED Driver

*

Part Number

Input Voltage,
Maximum (V) Efficiency (%) ISW/I

(A)

OUT

Switching
Frequency

Reference
Voltage (V)

Inductor
(µH)

Output
Capacitor (µF)

Quiescent
Current ISD (µA)

Package
(mmx mm)

*High Voltage Buck Regulators (Compatible with LTC3557, LTC3576 and LTC3577)

LT3505 3.6-36, 40 >85 1.75 / 1.2 300k-3MHz 0.78 6.8 10-Ceramic 2mA <2 3x3 DFN-8,

MSOP-8E

LT3480 3.6-38, 60 >85 3 / 2 200k-2MHz 0.79 4.7 22-Ceramic 70µA <1 3x3 DFN-10,

MSOP-10E

LT3481 3.6-34, 36 >85 3.2 / 2 300k-2.8MHz 1.26 4.7 22-Ceramic 50µA <1 3x3 DFN-10,

MSOP-10E

LT3653 7.5-30, 60 >85 2 / 1.2 1.5MHz n/a 4.7 10-Ceramic 2.8mA n/a 2x3 DFN-8

L i t h iu m- Io n/ Po ly me r

PMICs: Linear Battery Charger (Battery-Fed)

P M I C S

13

Our power management integrated circuits (PMICs) address battery
charging and multiple system power rail needs in single-cell lithium
portable products. A high level of integration is offered in a small
footprint for a compact total solution size and ease-of-use.

LTC3558: Linear USB Battery Charger with Buck-Boost and
Buck Regulators

Features:

Power Manager

• Standalone USB Charger

• Up to 950mA Charge Current Programmable via Single Resistor

• HPWR Input Selects 20% or 100% of Programmed Charge Current

• NTC Input for Temperature Qualified Charging

• Internal Timer Termination

• Bad Battery Detection

Switching Regulators

• 400mA Output Current per Regulator

• 2.25MHz Constant Frequency Operation

• Power Saving Burst Mode

• Low Profile 3mm × 3mm 20-Pin QFN Package

®

Operation

Applications:

• PNDs, DMB/DVB-H; Digital/Satellite Radio

• SD/Flash-Based MP3 Players

• Portable Industrial/Medical Products

• Universal Remotes, Photo Viewers

• Other USB-Based Handheld Products

• Low Power Handheld Applications

LTC3558: Actual Size,

Complete Solution

Solution Size =
12mm x 11mm

100

= 3.3V

V

OUT

I

= 10mA

I

LOAD

= 400mA

LOAD

PV

IN2

95

90

85

80

75

70

EFFICIENCY (%)

65

60

55

50

2.7 3.0 3.3 3.6 3.9 4.2

Buck-Boost Regulator Efficiency
vs Input Voltage

USB (4.3V TO 5.5V)

DIGITAL

CONTROL

V

CC

1µF

1.74k
PROG

NTC

LTC3558

CHRG

SUSP

HPWR

MODE

EN1

EN2

GND

EXPOSED

PAD

BAT

PV

PV

SW1

FB1

SWAB2

SWCD2

V

OUT2

FB2

V

IN1

IN2

10µF

4.7µH

C2

2.2µH

324k

105k

324k

649k

121k

33pF

15k

330pF

USB Charger Plus Buck Regulator and Buck-Boost Regulator

I

= 100mA

LOAD

(V)

SINGLE

+

Li-lon CELL
(2.7V TO 4.2V)

1.2V AT 400mA

10pF

3.3V AT 400mA

= 1mA

I

LOAD

Burst Mode
OPERATION
PWM MODE

10pF

10µF

22µF

Part Number

Number of
Regulators

Maximum Charge
Current (mA) Input Voltage (V)

Buck(s)
(I

)

OUT

Buck-Boost(s)
(I

)

OUT

Power Management Integrated Circuits (PMICs), Charger-Fed

LTC4080 1 500 2.7 - 4.5 300mA –

LTC4081 1 500 2.7 - 4.5 300mA –

LTC3550/-1 1 950 2.5 - 5.5 600mA –

LTC3552/-1 2 950 2.5 - 5.5 400mA/800mA –

LTC3558 2 950 3.0 - 4.2 400mA 400mA

LTC3559 2 950 3.0 - 4.2 400mA x 2 –

Li-Ion/Polymer
Charger

~

~

~

~

~

~

PowerPath
Topology

Package
(mmx mm)

– 3x3 DFN-10,

MSOP-10E

– 3x3 DFN-10

– 3x5 DFN-16

– 3x5 DFN-16

– 3x3 QFN-20

– 3x3 QFN-16

S W I T C H M O DE BU C K BAT TE RY C H A RG E R S

14

L i t h iu m- Io n/ Po ly me r

L i F e PO

4

N i M H /N iC d

L e a d -A ci d

M u l t ic he mi st ry

Switch Mode Buck Battery Chargers

Our step-down (buck) battery chargers enable high efficiency charging from a wide input voltage range for a variety of battery chemistries.

LT3651: Monolithic 4A High Voltage Li-Ion Battery Charger

MBRS340

V

IN

5.5V TO 32V

54.9k

CLP

SHDN
ACPR
FAULT
CHRG

RT

LT3651-4.2

TIMER

I

RNG/SS

LIM

V

CLN

IN

SW

BOOST

SENSE

BAT

NTC

GND

7.5V to 32V Single Cell 4A Charger 24V 5-Cell LiFePO4 Charger (18V at 1.5A) with C/10 Termination

1µF

1N5819

22µF

3.3µH

24m

TO
SYSTEM
LOAD

100µF

+

BATTERY

LT3652HV: Power Tracking 2A Battery Charger

750k

10µF

44.2k

MBRS340

51.1k

V

IN

LT3652HV

V

IN_REG

SHDN

CHRG

FAULT

TIMER

BOOST

SENSE

SW

BAT

NTC

V

FB

1µF

127k

R1
10K
B = 3380

10V

1N4148

AC ADAPTER

INPUT

24VDC AT 1A

665k

150k

20µH

10µF

D3

MBRS340

0.068

5-Cell LiFePO

(18V FLOAT)

SYSTEM
LOAD

+

PACK

4

Part Number

Maximum
Charge
Current (A)

V
(V)

BAT

Range

Battery
Chemistry

Number of
Battery
Cells (Series)

Input
Voltage (V)

Integrated
Power
Transistor Synchronous

Charge
Termination

Package
(mmx mm)

Switch Mode Multichemistry Buck (Step-Down) Battery Chargers

LT1510 1 2.5 to 26 NiMH NiCd

SLA Li-Ion

LT3652 2 3.3 to 14.4 SLA

LiFePO

4

Li-Ion

LT3652HV 2 3.3 to 18 SLA

LiFePO

4

Li-Ion

LT1769 2 2.5 to 26 NiMH NiCd

SLA Li-Ion

LT1511 3 2.5 to 26 NiMH NiCd

SLA Li-Ion

LTC4008 4 3 to 28 NiMH NiCd

SLA Li-Ion

‡

‡

LTC4009/-1

*

/-2

4 2 to 28 NiMH NiCd

SLA Li-Ion

‡

*

LTC4012/-1

/-2‡/-3 4 2 to 28 NiMH NiCd

SLA Li-Ion

LT1505 8 2.5 to 23 NiMH NiCd

SLA Li-Ion

LTC1960 8 3.5 to 28 NiMH NiCd

SLA Li-Ion

1-12 Ni, SLA
1-4 Li-Ion

SLA
1-4 LiFePO4
1-3 Li-Ion

SLA
1-5 LiFePO4
1-4 Li-Ion

1-12 Ni, SLA
1-4 Li-Ion

1-12 Ni, SLA
1-4 Li-Ion

4-18 Ni, SLA
2-6 Li-Ion

2-18 Ni,
1-6 Li-Ion

2-18 Ni,
1-6 Li-Ion

1-12 Ni, SLA
1-4 Li-Ion

4-16 Ni, SLA
2-6 Li-Ion

7 to 29

~

– External µC

or LTC1729

4.9 to 32

4.9 to 34

7 to 29

†

†

~

~

~

– Timer or C/10 3x3 DFN-12,

– Timer or C/10 3x3 DFN-12,

– External µC

or LTC1729

7 to 29 – – External µC

or LTC1729

6 to 28 –

6 to 28 –

6 to 28 –

11 to 26 –

6 to 28 –

~

~

~

~

~

External µC SSOP-20

External µC 4x4 QFN-20

External µC 4x4 QFN-20

External µC SSOP-28

External µC 5x7 QFN-38,

SO-8, SSOP-16,
SO-16

MSOP-12E

MSOP-12E

TSSOP-20
SSOP-28

SO-24

SSOP-36

Switch Mode Li-Ion Buck Battery Chargers

LT1571 1.5 2.5 to 26 Li-Ion 1-2, Adj 6.2 to 27

~

– External µC SSOP-16

SSOP-28

LTC4001/-1

*

LT3650-4.1/-4.2 2 4.1, 4.2 Li-Ion 1 4.75 to 32

LT3650-8.2/-8.4 2 8.2, 8.4 Li-Ion 2 9 to 32

LT3651-4.1/4.2 4 4.1, 4.2 Li-Ion 1 4.8 to 32

LT3651-8.2/8.4

2 4.2 Li-Ion 1 4 to 5.5

(40 Max)

(40 Max)

4 8.2, 8.4 Li-Ion 2 9 to 32

~ ~

†

~

– Timer + C/10 3x3 DFN-12

Timer 3x3 QFN-16

MSOP-12E

†

~

– Timer + C/10 3x3 DFN-12

MSOP-12E

~ ~

~ ~

Timer + C/10 5x6 QFN-36

Timer + C/10 5x6 QFN-36

LTC4002-4.2/-8.4 4 4.2, 8.4 Li-Ion 1-2 4.7 to 22 – – Timer 3x3 DFN-10

SO-8

LTC4006-2/-4/-6 4 5 to 16.8 Li-Ion 2-4 6 to 28 –

LTC4007/-1 4 7.5 to 16.8 Li-Ion 3-4 6 to 28 –

* 4.1V Cell Voltage

†

Minimum Start-Up Voltage is + 3.3V Above V

‡

–1 and –2 Versions are Fixed Voltage Options for 1-4 Li-Ion Cells

BATMAX

~

~

Timer SSOP-16

Timer SSOP-24

L i t h iu m- Io n/ Po ly me r

L i F e PO

4

N i M H /N iC d

Switch Mode Buck-Boost Battery Chargers

L e a d -A ci d

M u l t ic he mi st ry

S W I T C H M O DE BU C K - BO O S T B AT T E R Y C HA R G E RS

15

Our buck-boost battery chargers seamlessly charge a battery as
its voltage varies below, above or equal to the input voltage.

LTC4110: Battery Backup System Manager

Package: 5mm x 7mm QFN-38

Features:

• Complete Backup Battery Manager for Li-Ion/ Polymer, Lead Acid,

NiMH/NiCd Batteries and Supercapacitors

• Charge and Discharge Battery with Voltages Above and Below the

Input Supply Voltage

• “No Heat” Battery Calibration Discharge Using System Load

• Automatic Battery Backup with Input Supply Removal Using

PowerPath Control

• Standalone for Li-Ion/Polymer, SLA, and Supercapacitors

• Optional SMBus Support Allows Battery Capacity Calibration

Operation with Host

• Over- and Under-Battery Voltage Protection

• Adjustable Battery Float Voltage

• Programmable Charge/Calibration Current Up to 3A with

±3% Accuracy

• Wide Backup Battery Supply Range: 2.7V to 19V

• Wide Input Supply Range: 4.5V to 19V

SYSTEM LOAD

DCIN

0V

UVLO

SET POINT

BACKUP LOAD (DCOUT)

IND BATID

LTC4110

DCDIV

Battery Backup System Manager

LTC4110

HOST CPU

ON ONOFF

CHGFET

DCHFET

CURRENT FLOW

SMBus

CURRENT FLOW

BATTERY

SYSTEM LOAD

(DC/DC, ETC.)

BACKUP LOAD

(MEMORY, ETC.)

BATTERY

100

90

80

70

60

50

40

EFFICIENCY (%)

30

20

10

0

EFFICIENCY

POWER LOSS

0.20.1 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.00

0

I

LOAD

(A)

Charging Efficiency/Power Loss, 12VIN and 12.6V

Part Number

Number of
Battery
Cells (Series)

Maximum
Charge
Current (A) V

2.5

2.0

POWER

1.5
LOSS

(W)

1.0

0.5

0

OUT

Battery

Range (V)

BAT

Chemistry

Switch Mode Buck-Boost (Step-Down/Step-Up) Battery Chargers

LT1512 1-12 Ni 0.8 1.5 to 20 NiCd NiMH

SLA

LT1513 1-12 Ni 1.6 1.5 to 20 NiCd NiMH

SLA

LTC1980 1-2 Li 4 2.85 to 10 NiCd NiMH

Li-Ion

LTC4110

Up to 10 Ni,
1-4 Li,

4 3.5 to 18 NiCd NiMH

SLA, Li-Ion

†

*

Up to 6 SLA

* Flyback Topology,

†

Supercapacitor Compatible

Server Backup System (In Backup Mode)

LTC4110:

Actual Size
Demo Circuit

Integrated
Input
Voltage (V)

2.4 to 29

2.4 to 29

Power

Transistor Synchronous Charge Termination

~

~

– External µC SO-8

– External µC DD Pak,

4.1 to 12 – – External µC,

Timer (Li)

6 to 19 –

~

Timer, C/10, SMBus 5x7 QFN-38

Package
(mmx mm)

TO-220

SSOP-24

S M A R T BAT TE R Y CH A R G ER S

B AT TE RY M AN A G E ME N T SO L UT I O N S

16

Smart Battery Chargers

L i t h iu m- Io n/ Po ly me r

L i F e PO

4

N i M H /N iC d

M u l t ic he mi st ryL e a d -A ci d

Our smart battery chargers offer true plug-and-play operation,
independent of chemistry and cell configuration, built-in safety
features, reliable battery detection and automatic charge
management.

LTC1760:

Actual Size
Demo Circuit

LTC4100: Smart Battery Charger Controller

DCIN

CHGEN

3V

TO 5.5V

ACP

1.13k

54.9k

1.21k

13.7k

LTC4100

17

V

DD

11

DCDIV

6

CHGEN

10

ACP

7

SMBALERT

9

SCL

8

SDA

15

THB

16

THA

13

I

LIM

14

V

LIM

20

I

10k

DC

LTC1760: Dual Smart Battery System Manager

DC

IN

SafetySignal 1

SMBus 1

SMART

BATTERY

Dual Battery Charger/Selector System Architecture

5

DCIN

INFET

CLN

TGATE

BGATE

PGND

CSP

V

GND

4

24

CLP

23

1

3

2

21

22

BAT

18

SET

19

I

TH

12

6.04k

5k

SafetySignal 2

SMBus 2

LTC1760

SMART BATTERY

SMBus (HOST)

SYSTEM LOAD

SYSTEM
LOAD

SMBALERT#

SMBCLK

SMBDAT

SafetySignal

SMBCLK

SMBDAT

SMBus Smart Battery Charger Controller

Maximum

Part Number

Charge
Current (A)

V

BAT

Range (V) Standalone

Serial
Bus Type

Single or Dual
Battery Pack

Float Voltage
Accuracy

Safety
Limits

AC Present
Output

Charger
On Status

Thermistor
Interface

Package
(mm x mm)

SMBus/SPI Battery Chargers (Controllers)

LTC4110 3 3.5 to 18

LTC4100 4 3.5 to 26

LTC4101 4 2.7 to 4.2

LTC1760 4 3.5 to 28

LTC1759 8 3 to 23

~

~

~

~

~

SMBus 1.1 Single * 0.5% –

SMBus 1.1 Single 0.8%

SMBus 1.1 Single 0.8%

SMBus 1.1 Dual 0.2%

SMBus 1.0 Single 1%

~ ~ ~

~ ~ ~ ~

~ ~ ~ ~

~ ~ ~ ~

~

–

~ ~

5x7 QFN-38

SSOP-24

SSOP-24

TSSOP-48

SSOP-36

LTC1960 8 6 to 28 – SPI Dual 0.8% – – – – 5x7 QFN-38,

SSOP-36

* Scalable

L i t h iu m- Io n/ Po ly me r

Ideal Diodes/PowerPath Controllers

I D E A L DI O DE S / P OW E R PAT H CO NT R O L L ER S

17

Our Ideal Diode devices provide a low loss, near “ideal” diode function. They feature much lower forward
voltage drop and reverse leakage current than conventional Schottky diodes. This reduces power loss and
eases thermal management while extending battery run time.

LTC4413:

Actual Size
Demo Circuit

LTC4413: Dual 2.6A, 2.5V to 5.5V Ideal Diodes in 3mm x 3mm DFN

2000

1500

LTC4413

(mA)

1000

OUT

I

500

0

0

100

200

V

(mV)

FWD

LTC4413 vs 1N5817 Schottky

Forward
Voltage (mV)

Forward ON
Resistance

1N5817

300

Reverse
Leakage
Current (µA)

400

Supply
Current (µA)

Package
(mmx mm)

ENBA

GND

WALL

ADAPTER

(0V TO 5.5V)

BAT

ENBB

INB OUTB

INA

Monolithic Dual Ideal Diode

Part Number Ideal Diode

LTC4413

CONTROL CIRCUIT

External
MOSFET

STAT

OUTA

V

CC

470k

Integrated
MOSFET

STAT IS HIGH WHEN
BAT IS SUPPLYING
LOAD CURRENT

TO LOAD

Maximum
Current (A)

Input Voltage
(V)

P-Channel PowerPath/Ideal Diode Controllers

LTC4411 Single P-Channel

1 2.6 to 5.5 28 140mΩ 1 35 ThinSOT

~

LTC4412 Single P-Channel – 2* 2.5 to 28 20 Controller 3 13 ThinSOT

LTC4412HV Single P-Channel – 2* 2.5 to 36 20 Controller 3 13 ThinSOT

LTC4413/-1

LTC4413-2

Dual P-Channel

†

Dual P-Channel

2.6 2.5 to 5.5 28 100mΩ 1 20 3x3 DFN-10

~

2.6 2.5 to 5.5,13 OVP 28 100mΩ 1 20 3x3 DFN-10

~

†

LTC4414 Single P-Channel – 5-75* 3 to 36 22 Controller 3 33 MSOP-8

LTC4416/-1 Dual P-Channel – 5-75* 3.6 to 36 22 Controller 3 70 MSOP-10

* Depends on MOSFET Selection,

†

High Speed Version

LTC4352: MOSFET Diode-OR Controller

Q2

5V

31.6k
1%

1%

3.09k
1%

1k

Si7336ADPQ1Si7336ADP

0.15µF

SOURCE GATE

CPOV

IN

UV

OV

GND

LTC4352

OUT

FAULT

STATUS

5V Ideal Diode Circuit with Input Undervoltage and Overvoltage Protection

V

REV

CC

TO LOAD

5V

5V

1k 1k

D2 D1

FAULT

0.1 µF

D1: GREEN LED LN1351C
D2: RED LED LN1261CAL

MOSFET ON

Part No.

Diode

External
MOSFET

Maximum
Current (A)

Input
Voltage (V)

Package
(mmx mm)

Ideal

N-Channel Power PowerPath/Ideal Diode Controllers

LTC4352 Single N-Channel ≥5* 0 to 18 3x3 DFN-12,

MSOP-12

LTC4357 Single N-Channel ≥5* 9 to 80 2x3 DFN-6,

MSOP-8

LTC4358 Single N-Channel

(Internal)

5 9 to 26.5 4x3 DFN-14

TSSOP-16

LTC1473 Dual N-Channel ≥5* 4.75 to 30 SSOP-16

LTC1473L Dual N-Channel ≥5* 2.8 to 9 SSOP-16

†

LTC2952

Dual N-Channel ≥5* 2.7 to 28 TSSOP-20

4x4 QFN-20

LTC4354 Dual N-Channel ≥5* -4.5 to -100

(Floating)

3x2 DFN-8,
SOIC-8

LTC4355 Dual N-Channel ≥5* 9 to 80 4x3 DFN-14,

SOIC-16

LTC1479 Triple N-Channel ≥5* 6 to 28 SSOP-36

* Depends on MOSFET Selection, † Pushbutton PowerPath Controller with Supervisor

S P E C I A L F UN C T I ON S / B ATT ERY C H AR G E R S U PP O R T DE V IC E S

18

Supercapacitor Chargers

LTC3625/-1: 1A High Efficiency 2-Cell Supercapacitor
Chargers with Automatic Cell Balancing

Package: 3mm x 4mm DFN-12

Features:

• High Efficiency Step-Up/Step-Down Charging of Two Series

Supercapacitors

• Automatic Cell Balancing Prevents Capacitor Overvoltage During Charging

• Programmable Charging Current Up to 500mA

(Single Inductor), 1A (Dual Inductor)

• V

• Selectable 2.4V/2.65V Regulation per Cell (LTC3625)

• Selectable 2V/2.25V Regulation per Cell (LTC3625-1)

• Low No-Load Quiescent Current: 23μA

• I

• Low Profile 12-Lead 3mm x 4mm DFN Package

= 2.7V to 5.5V

IN

, I

< 1μA in Shutdown

VOUT

VIN

V

IN

2.7V TO 5.5V
10µF

61.9k

1A Supercapacitor Charger

V

IN

PROG

PFI
EN
CTL
V

SEL

LTC3625

V

OUT

SW2

SW1

V

MID

PGOOD

PFO

3.3µH

3.3µH

S u p e rc ap ac it or

V

OUT

4.8V

1F

1F

Part Number Topology

Input
Voltage (V) VCAP (Max) (V)

Quiescent Current
(µA)

Charge
Current

Supercapacitor Chargers

LTC3225

Charge Pump-Boost 2.8-5.5 5.5 20 150mA –

LTC3225-1

LTC3625

Switching Buck & Boost 2.7-5.5 5.5 23 1A* –

LTC3625/-1

LTC4425 Linear 2.7-5.5 5.5 20 2A –

* In 2-Inductor Circuit, 500mA in 1-Indicator Configuration,

†

Current-Limited Ideal Diode VIN to V

, ‡ While Charging

OUT

LTC3225/-1: 150mA Supercapacitor Charger

Package: 2mm x 3mm DFN-10

Features:

2.8V/3V TO 5.5V

• Low Noise Constant Frequency Charging of Two Series Supercapacitors

• Automatic Cell Balancing Prevents Capacitor Overvoltage During Charging

• Programmable Charging Current (Up to 150mA)

• Selectable 2.4V or 2.65V Regulation per Supercapacitor Cell (LTC3225)

• Selectable 2.0V and 2.25V Regulation per Supercapacitor Cell (LTC3225-1)

• Automatic Recharge

• I

= 20μA in Standby Mode

VIN

• I

< 1μA When Input Supply is Removed

VOUT

• No Inductors

• Tiny Application Circuit (2mm x 3mm DFN Package,

Charge Pump-Based Supercapacitor Charger

All Components < 1mm High)

Power
Path

V

IN

PROGRAMMING

†

Automatic SCap
Balancing

~

~

~ ~

2.2µF

1µF

ON/OFF

OUTPUT

SCap Overvoltage
Protection Package

‡

‡

IN

+

LTC3225

–

SEL

PROG

C

OUT

GND

PGOOD

12k

CX

V

C

C

SHDN

V

~

~

2x3 DFN-10

3x4 DFN-12

3x3 DFN-12
MSOP-12

V

OUT

0.6F

0.6F

4.8V/5.3V

100k

L i t h iu m- Io n/ Po ly me r

Special Functions/Battery Charger Support Devices

LTC4000: 60V Battery Charging Controller & Power Manager

Packages: 4mm x 5mm QFN-28 and SSOP-28

Features:

• Implements a Complete High Performance Battery Charger when Paired
with a DC/DC Converter (Buck, Buck-Boost, Boost, SEPIC, Flyback)

• Wide Input and Output Voltage Range: 3V to 60V

• Input Ideal Diode for Low Loss Reverse Blocking and Load Sharing

• Output Ideal Diode for Low Loss PowerPath™ and Load Sharing with the Battery

• Instant-On Operation with Heavily Discharged Battery

• Programmable Input and Charge Current: ±1% Accuracy

• Accurate Programmable Float Voltage: ±0.2% at Room and ±1%
Over Temperature

• Programmable C/X or Timer Based Charge Termination

• NTC Input for Temperature Qualified Charging

• 28-Lead 4mm × 5mm QFN or SSOP Packages

Target Applications:

• High Power Battery Charger Systems

• High Performance Portable Instruments

• Industrial Battery Equipped Devices

• Notebook/Subnotebook Computers

• General Purpose Charging

LTC4000 Demo Circuit

4m

IN

1µF

365k

100k

3.0V

10nF

10nF

LTC3789

OUT

ITHRUN

14.7k

ITH CC IID

RST
CLN
IN

VM

ENC

CHRG

FLT

IIMON

IBMON

C O N TR O L L ER PO W E R M A NA G E R S

330µF

2

47nF

LTC4000

CLILTMR

24.3k

Si7135DP

887k

CSP

IGATE

CSN

BGATE

BAT

OFB

FBG

BFB

NTC

GND BIAS

CX

10k

1µF0.1µF

10k

NTHS0603

N02N1002J

64.9k

115k

1.58M

10k

SYSTEM6V TO 36V

10m

Si7135DP

16.8V FLOAT
5A MAX CHARGE
CURRENT

4-CELL Li-Ion
BATTERY PACK

19

5A Buck-Boost Converter 4-Cell Li-Ion Battery Charger with 2.9h Timer
Termination and 600mA Trickle Charge Current

100

V

= 15V, I

11

= 4A, fSW = 400kHz

OUT

EFFICIENCY

POWER LOSS

16 21

VIN (V)

26 31

OUT

98

96

94

EFFICIENCY (%)

92

90

88

6

7

6

POWER LOSS (W)

5

4

3

2

1

36

Efficiency and Power Loss for the LTC4000/
LTC3789: 5A 4-Cell Li-Ion Battery Charger System

S P E C I A L F UN C T I ON S / B ATT ERY C H AR G E R S U PP O R T DE V IC E S

20

Special Functions /Battery Charger Support Devices

LTC4150: Coulomb Counter and Battery
Gas Gauge

Package: MSOP-10

Features:

• Indicates Charge Quantity and Polarity

• ± 50mV Sense Voltage Range

• 2.7V to 8.5V Operation

• High Side Sense

Battery Gas Gauge and Coulomb Counter

4.7µF

BAT

+

R

SENSE

SENSE–SENSE

+

C

F

LTC4150

–

C

F

GND

L i t h iu m- Io n/ Po ly me r

CHARGER

LOAD

4.7µF

R

R

L

+

V

DD

L

INT

CLR

POL

CHG

DISCHG

µP

SHDN

Measures

Part Number

Supply
Voltage (V)

Max Shutdown
Current (µA)

Accumulated
Charge & Discharge

Battery Gas Gauges

LTC4150 2.7 to 8.5 1.5

LTC2941/-1 2.7 to 5.5 2

LTC2942/-1 2.7 to 5.5 2

LT3755: LED Driver Controller as SEPIC
SLA Battery Charger

Packages: 3mm x 3mm QFN-16 and
MSOP-16

Features:

• Wide VIN Range: 4.5V to 40V

• Adjustable Frequency: 100kHz to 1MHz

• Low Shutdown Current: < 1µA

• Constant-Current and Constant-Voltage Regulation

Charge Accuracy
(%)

~

~

~

IN

No Spec – – – 2 μC I/O Pins MSOP-10

1

1

8V to 40V

C7

4.7µF

R9
287k

R10

12.1k

R5
499k

R6

90.9k

4700pF

28.7k
400kHz

R7

OPENLED

10k

INTV

CC

Integrated
R

SENSE

– /~

– /~ ~ ~

SHDN/UVLO

OPENLED

V

REF

CTRL

V

C

C4

SS

0.01µF

R

T

PWM

Measures
Current

V

IN

LT3755

IN

GND

Temperature
Sensor Interface Package

2

– – I

C1

4.7µF

OPENLED

L1
22µH

OUT

BAT

R8

33.1k

PWM

INTV

GATE

SENSE

OUT

Coiltronics
DRQ127-220

CC

FB

ISP

ISN

C/SMBus 2x3 DFN-6

2

C/SMBus 2x3 DFN-6

I

C5

D1

1µF

MBRS360

L2
22µH

Q1
Si7850DP

R1
15m

R13
432k

Q2

C6
15pF

= 13.5V

V

FLOAT

V

CHARGE

at T = 25ºC

C2
10µF

R14

63.4k

Q3

< 14.7V

R2

38.3k

R3

80.6k

R15

9.63k

BAT

OUT

R4

+

50m
RT1
10k

BAT

NTC

R12
10k

Integrated

SEPIC Sealed Lead Acid (SLA) Battery Charger

L i t h iu m- Io n/ Po ly me r

S P E C I A L F UN C T I ON S / B ATT ERY C H AR G E R S U PP O R T DE V IC E S

High Side and Low Side Current Sensing

Sensing and controlling current flow is a fundamental requirement
in many battery charger and monitor applications.

High side current sense amplifiers extract small differential voltages
from high common mode voltages. This is used to measure the
voltage on a small sense resistor placed in series between a power
supply and load, providing a direct measurement of current flowing
into the load.

In some applications, low side current sensing can be used, where
a sense resistor is placed between load and ground. The best solu­tions for low side sensing are micropower, rail-to-rail input amplifiers
with low input bias current and low offset voltage.

For more information, see our complete current sense solutions guide
at www.linear.com/currentsense

Dual Current Sensor for Charge and Discharge Monitoring

LTC6104: Dual Current Sensor for Charge and
Discharge Monitoring

Part Number Directional Sense

Input Voltage
Range (V)

Response
Time (µsec) VOS Max (µV) VOS Drift I

High Side Current Sense Amplifiers

LT1787 Bidirectional 2.5 to 40 10 75 0.5µV/°C 20uA Fixed Av=8 SO-8, MSOP-8

LT1787HV Bidirectional 2.5 to 65 10 75 0.5µV/°C 20uA Fixed Av=8 SO-8, MSOP-8

LTC4151 Unidirectional 7 to 80 n/a 4000 n/a n/a n/a DFN-10, MSOP-10

LT6100 Unidirectional 4.1 to 48 40 300 0.5µV/°C 10µA 10,12.5,20,25,40,50V/V DFN-8, MSOP-8

LTC6101 Unidirectional 4 to 70 1 300 1µV/°C 170nA Adj w/ 2 Resistors SOT-23, MSOP-8

LTC6101HV Unidirectional 5 to 105 1 300 1µV/°C 170nA Adj w/ 2 Resistors SOT-23, MSOP-8

LTC6102 Unidirectional 4 to 70 1 10 50nV/°C 3nA Adj w/ 2 Resistors DFN-8, MSOP-8

LTC6102HV Unidirectional 5 to 105 1 10 50nV/°C 3nA Adj w/ 2 Resistors DFN-8, MSOP-8

LTC6103 Unidirectional 4 to 70 1 450 1.5µV/°C 170nA Adj w/ 2 Resistors MSOP-8

LTC6104 Bidirectional 4 to 70 1 450 1.5µV/°C 170nA Adj w/ 2 Resistors MSOP-8

LT6105 Unidirectional -0.3 to 44 3.5 300 1µV/°C 25uA Adj w/ 2 Resistors DFN-6, MSOP-8

LT6106 Unidirectional 2.7 to 44 3.5 250 1µV/°C 40nA Adj w/ 2 Resistors SOT-23

LT6107 Unidirectional 2.7 to 44 3.5 250 1µV/°C 40nA Adj w/ 2 Resistors

V

OUT

CHARGER

R

LOAD

R

OUT

V

REF

Max Gain Package

BIAS

LTC6104

R

SHUNTA

A

INB

R

INA

CURRENT

MIRROR

R

SHUNTB

BATTERY

B

SOT-23

21

Part Number Description

Low Side Current Sense Amplifiers

®

LT1490A/91A Dual/Quad Over-The-Top

µPower

Rail-to-Rail Op Amps

LT1636 Over-The-Top Micropower

Rail-to-Rail Single Supply Op Amp

LT1638/39 1.2MHz, Over-The-Top Micropower

Rail-to-Rail Op Amp

LTC2054/55 Single/Dual Low Power, Zero-Drift,

3V, 5V Op Amps

LT6010/11/12 Single/Dual/Quad µPower Precision

Rail-to-Rail Op Amps

LT6105 Precision, High Side or Low Side,

Current Sense Amplifier

Rail­to-Rail

Direction
Sense

Input Voltage
Range (V)

V

Max

OS

(µV) V

I

Drift

OS

BIAS

Max Gain Package

In/Out Bidirectional 2 to 44 500 4µV/°C 8nA Adj w/ 2

Resistors

In/Out Bidirectional 2.6 to 44 225 5µV°C 8nA Adj w/ 2

Resistors

In/Out Bidirectional 2.2 to 44 600 6µV/°C 50nA Adj w/ 2

Resistors

Out Bidirectional 2.7 to 12 3 0.05µ/ºC 3nA Adj w/ 2

Resistors

Out Bidirectional 2.7 to 40 35 0.8µV/°C 0.11nA Adj w/ 2

Resistors

In Unidirectional -0.3 to 44 300 1µV/°C 25uA Adj w/ 2

Resistors

DFN-8, DIP-8, MSOP-8,
SO-8, DIP-14, SO-14

DFN-8, DIP-8, MSOP-8, SO-8

DFN-8, DIP-8, MSOP-8,
SO-8, DIP-14, SO-14

ThinSOT, DFN-8, MSOP-8

DFN-8, SO-8

DFN-6, MSOP-8

S P E C I A L F UN C T I ON S / B ATT ERY C H AR G E R S U PP O R T DE V IC E S

22

High Voltage Battery Stack Monitoring

L i t h iu m- Io n/ Po ly me r

LTC6802: 44-Lead SSOP Supports Hybrid/Electric Vehicles and
Battery Backup Systems

The LTC6802 is a highly integrated battery monitoring IC capable
of measuring up to 12 individual cells. Using a unique level shift­ing technique, multiple LTC6802s can be stacked in series without
optocouplers or isolators, allowing precision voltage monitoring of
every cell in long strings of series-connected cells. Long cell strings
enable high power, rechargeable battery applications, such as elec­tric and hybrid electric vehicles, scooters, motorcycles, golf carts,
wheelchairs, boats, forklifts, robotics, uninterruptible power supply
systems and portable medical equipment.

With superior energy density, lithium-ion batteries are poised to
be the power source of choice for these applications. However,
designing a large, highly reliable and long lasting Li-Ion battery
stack is a very complex problem. Li-Ion cells are sensitive to over­charging or over-discharging, requiring that each cell in a stack is
carefully managed. The LTC6802 makes this possible with quick
and accurate measurements of all cell voltages, even in the pres­ence of stack voltages greater than 1000V+.

The maximum total measurement error is guaranteed to be less
than 0.25% from –40ºC to 85ºC and all cell voltages in a battery
stack can be measured within 13ms. Each cell is monitored for
undervoltage and overvoltage conditions and an associated
MOSFET switch is available to discharge overcharged cells. The
LTC6802 communicates via a 1MHz serial interface. Also included
are temperature sensor inputs, GPIO lines and a precision
voltage reference.

The LTC6802 is designed for the environmental and
reliability challenges of automotive and industrial
applications. It is fully specified for operation from
–40ºC to 85ºC and offers diagnostics and fault
detection. The LTC6802 is available in a small
8mm x 13mm surface mount package. The com­bined robustness, exceptional precision and tiny
package directly address the critical requirements
of emerging and advanced battery technologies.

Features:

• 0.25% Maximum Total Measurement Error from

–40ºC to 85ºC

• Stackable Architecture Enables 1000V+ Systems

• Delta Sigma Converter with Built-In Noise Filter

• 1MHz Serial Interface with Packet Error Checking

• Onboard FETs for Cell Discharge

• Temperature Sensor Inputs

• Diagnostics and Fault Detection

• AEC-Q100 Qualified

• 44-Lead SSOP Package

• Fully Specified for –40ºC to 85ºC

LTC6802:

Demo Board

Measurement Error (%)

-50

Cell Voltage Measurement Error Over Extended
Temperature Range

Representative Units

Temperature (ºC)

Rugged IC for Hybrid/Electric Vehicles and Battery Backup Systems

L i t h iu m- Io n/ Po ly me r

High Voltage Battery Stack Monitoring

LTC6801: Battery Stack Monitor IC Provides Independent
Fault Detection

The LTC6801 is a high voltage battery stack fault monitor that
operates without a microprocessor, and without the need for
optocouplers or isolators. An LTC6801 can monitor up to 12 series­connected battery cells for overvoltage and undervoltage conditions.
Multiple LTC6801 devices can be daisy chained, providing a method
to monitor each individual cell in very long battery strings. When
connected in a daisy-chain, a single differential clock output confirms
that all cells in the stack are within the defined operating range.
This clock interface provides high noise immunity and ensures that
fault conditions are not hidden by frozen bits or short circuit condi­tions. The result is a reliable and simple design that can serve as a
complete monitoring or redundant circuit. The LTC6801 is a low cost
companion to the LTC6802 precision battery measurement and cell
balancing IC, providing a backup circuit for hybrid electric battery
packs, battery backup systems, and other high powered Li-Ion
battery systems.

A wide range of overvoltage and undervoltage thresholds can be
set via pin connections and the LTC6801 offers selectable threshold
hysteresis and adjustable update rates. The LTC6801 is fully specified
for operation from –40°C to 85°C and two temperature sensor inputs
are monitored for overtemperature faults.

S P E C I A L F UN C T I ON S / B ATT ERY C H AR G E R S U PP O R T DE V IC E S

TOP OF STACK

Voltage

Reference

12-Bit

ADC

Voltage

Reference

12-Bit

ADC

23

Features:

• Monitors Up to 12 Li-Ion Cells in Series (60V Max)

• Stackable Architecture Enables > 1000V Systems

• 1% Maximum Overvoltage Detection Level Error

• Adjustable Overvoltage and Undervoltage Detection

• Self-Test Features Guarantee Accuracy

• Robust Fault Detection Using Differential Signals

• Simple Pin-Strapped Configuration Allows Battery Monitoring

without a Microcontroller

• 15.5ms to Monitor All Cells in a System

• Programmable Response Time

• Two Temperature Monitor Inputs

• Low Power Idle Mode

• 36-Lead SSOP Package

1.0

+

V

= 43.2V

0.8

OV = 4.116V

0.6

0.4

0.2

0

ERROR (%)

–0.2

–0.4

–0.6

–0.8

–1.0

–40 20 95–10 50 110 12558 0–25 35 65

5 TYPICAL UNITS

TEMPERATURE (°C)

Voltage

Reference

12-Bit

ADC

CLOCK IN (ENABLE)

BOTTOM OF STACK

CLOCK OUT (STATUS “OK”)

Differential Clock Signals are Transmitted Up and Down Stack via Daisy-Chain

NEXT HIGHER

CELL PACK

NEXT LOWER

CELL PACK

+

1

V

C12

2

C11

3

C2

12

C1

13

–

V

14

NTC

MUX

V

TEMP1VTEMP2

15 16

NTC

LTC6801

CONTROL

LOGIC

12

ADC

“CELLS GOOD”

REFERENCE

V

REF

17

ENABLE

INPUT

STATUS
OUTPUT

20

22

ISOLATION

CLOCK SIGNAL
INPUT ENABLES
THE LTC6801

CLOCK SIGNAL
OUTPUT INDICATES
SYSTEM “OK”

LTC6801 Block Diagram0V Detection Level Error

24

S P E C I A L F UN C T I ON S / B ATT ERY C H AR G E R S U PP O R T DE V IC E S

Battery Monitoring Devices

L i t h iu m- Io n/ Po ly me r

By combining a voltage reference with a comparator, it is easy
to create accurate battery monitors. Linear Technology offers a
number of combination parts, with very low power and high
accuracy voltage references. These parts are available in many pin
configurations to support a wide range of designs with minimum
package footprint and pin count.

The LT6700 is an ideal choice for a micropower “gas gauge”
because of its accuracy (<2% total threshold error over temperature).
As shown, it is simple to implement a 2-threshold “alkaline-cell”
battery monitor. In this example, the bottom comparator output
goes low when the pack voltage falls below 2V (1V per cell), which
corresponds to about 30% capacity remaining. The top comparator
output goes low when the pack voltage falls below 1.6V (0.8V per
cell), indicating that the battery pack has reached its rated end­of-life voltage. The number of threshold points can be increased by
extending the resistor-divider chain and using additional comparators.

LT6700-3: Micropower, Low Voltage, Dual Comparator with
400mV Reference

R3
1M

4

R2

63.4k

+

ALKALINE

+

AA CELLS

3

R1
261k

MONITOR CONSUMES ~10μA
HYSTERESIS IS APPROXIMATELY
2% OF TRIP VOLTAGE

Micropower Battery Monitor

LT6700-3

+

–

VR = 400mV
REFERENCE

–

+

5

COMP B

COMP A

2

V

BATT

1.4V (MIN)
3V (NOM)

R4

R5

1M

1M

6

V

S

1

> 1.6V

V

BATT

> 2V

V

BATT

Supply

Part Number Description

Supply
Voltage (V)

Prop Delay
(µs) Typ

Hysteresis
(mV)

Current
(µA)

Package
(mm x mm)

Comparator and Reference Combinations

LT6700 Dual Comparators with 400mV Reference 1.4 to 18 18 6.5 10 SOT-23, 2x3 DFN-6

LT6700HV 36V Input/Output Dual Comparators and Reference 1.4 to 18 18 6.5 10 SOT-23

LT6700MP Dual Comparators and Reference for –55°C to 150°C 1.4 to 18 18 6.5 10 2x3 DFN-6

LT6703 Single Comparator and Internal Reference 1.4 to 18 18 6.5 10 SOT-23, 2x2 DFN-3

LT6703HV 36V Input/Output Comparator and Reference 1.4 to 18 18 6.5 10 SOT-23

LTC1440 Ultralow Power Comparator with Reference 2 to 11 8 Adj 4 MSOP-8,SO-8, DIP-8,

3x3 DFN-8

LTC1441 Dual Ultralow Power Comparators with Reference 2 to 11 8 None 5.7 DIP-8, SO-8

LTC1442 Dual Ultralow Power Comparators with Reference 2 to 11 8 Adj 5.7 DIP-8, SO-8

LTC1443 Quad Ultralow Power Comparators with Reference 2 to 11 4 None 8.5 DIP-16, SO-16,

4x5 DFN-16

LTC1444 Quad Ultralow Power Comparators with Reference 2 to 11 4 Adj 8.5 DIP-16, SO-16,

4x5 DFN-16

LTC1445 Quad Ultralow Power Comparators with Reference 2 to 11 4 Adj 8.5 DIP-16, SO-16,

4x5 DFN-16

LTC1540 Nanopower Comparator with Reference 2 to 11 50 Adj 0.7 MSOP-8, SO-8,

3x3 DFN-8

LTC1541 Combined Amplifier, Comparator and Reference 2.5 to 12.6 8 2.25 7.5 MSOP-8, SO-8,

3x3 DFN-8

LTC1542 Micropower Amplifier and Comparator 2.5 to 12.6 8 2.25 5 MSOP-8, SO-8,

3x3 DFN-8

LTC1842 Dual Ultralow Power Comparators with Reference 2.5 to 11 4 Adj

5.7 SO-8

LTC1843 Dual Ultralow Power Comparators with Reference 2.5 to 11 4 Adj 5.7 SO-8

LTC1998 High Accuracy Comparator with 1.2V Reference 1.5 to 5.5 150 Adj 3.5 SOT-23

M A S T E R I N DE X — P OW E R MA N AG E R S A N D L IN E A R B AT T E R Y C HA R G E RS

25

10

7, 10

LTC4053 6

Integration/Features

††

††

Most Least

QFN-20 LTC4099 7, 10

QFN-20 LTC4160 7, 10

QFN-20 LTC4098 7, 10

QFN-20 LTC4098-3.6

DFN-14 LTC4088 10

DFN-22 LTC4090 10

DFN-22 LTC4089 7, 10

QFN-24 LTC4066 7, 10

QFN-16 LTC4055 7, 10

DFN-12 LTC4067 10

DFN-14 LTC4085 7, 10

QFN-28 LTC4155 7, 10

QFN-28 LTC4156

~

Thermistor Interface

Thermal Regulation

~

‡‡

‡‡

~ ~

~ ~

~ ~

~ ~

~

~

~ ~

~ ~

DFN-10 LTC4061 6

– DFN-10 LTC4062 6

~

DFN-10

MSOP-10

MSOP-10 LTC4050 6, 7

– DFN-10 LTC4063 6

~

–

~

– DFN-10 LTC4078/X 6

– DFN-10 LTC4075/X 6

– DFN-10 LTC4096/X 6

Thermal Shutdown

‡‡

4

For 1-Cell LiFePO

–

–

–

–

–

–

–

–

–

–

††

AC Present Signal

~ ~ ~ ~

~ ~ ~ ~

End-of-Charge Signal

CHARGE

I

Monitor

#

~ ~ ~

~ ~ ~

~ ~ ~

~ ~ ~

~ ~ ~

Integrated Pass Transistor

¶

¶

¶

¶

~ ~ ~

¶

¶

–

~ ~ ~

~ ~ ~ ~ ~ ~

~

~ ~** ~ ~ ~ ~

‡

¶

¶

‡

¶

~ ~ ~ ~

–

–

~

~ ~ ~

~

~ ~ ~ ~ ~ ~

‡

‡

¶

¶

~ ~

– –

~ ~ ~

~ ~ ~

~ ~ ~ ~ ~ ~

~ ~ ~ ~ ~

~ ~ ~ ~ ~

~ ~ ~ ~ ~

PROG Pin Tracks Charge Current, ** Gas Gauge Capability,

#

‡

‡

†

†

¶

†

Charge Termination

Standalone

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

Timer, § µC, ¶Timer + Current Indication,

‡

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

(Max), A
Battery Charge Current

Current C/x,

†

(Series)

MASTER INDEX—Power Managers and Linear Battery Chargers

Battery Charge Termination & Integration Status Signals Temperature Control Package Part Number Page Number

Number of Battery Cells

Li-Ion/Polymer 4.2V/Cell & 4.1V/Cell Linear Battery Chargers with PowerPath Control (Power Managers)

1 3.5

1 3.5

1 1.5

1 1.5

1 1.5

1 1.5

1 1.5

1 1.2

1 1.2

1 1.5

1 1.25

1 1.25

1 1.5

Li-Ion/Polymer 4.2V/Cell & 4.1V/Cell Linear Battery Chargers

1 1

1 1

1 1

1 2

1 1.25

1 0.95

1 0.95

1 1.2

* Current C/10,

M A S T E R I N DE X — P OW E R MA N AG E R S A N D L IN E A R B AT T E R Y C HA R G E RS

26

Integration/Features

Most Least

LTC4070 7, 8

LTC4071 7, 8

DFN-8 LTC4095 6

– DFN-10 LTC4077 6

– DFN-10 LTC4076 6

– DFN-8 LTC4068/X 6

– DFN-8 LTC4058/X 6

Thermistor Interface

Thermal Regulation

~ ~

–

AC Present Signal

End-of-Charge Signal

CHARGE

Monitor

#

I

~ ~ ~ ~ ~

~ ~ ~ ~ ~

~ ~ ~

Integrated Pass Transistor

†

†

~ ~ ~ ~ ~

* ~ ~ ~ ~ ~

†

¶

‡

Charge Termination

MSOP-10E LTC1733 6, 7

DFN-6 LTC4070 6

– ThinSOT LTC4054/X 6

– DFN-6 LTC4065/A 6

– – MSOP-10 LTC1732 6, 7

~ ~

– –

‡

~

~ ~

– – – MSOP-8 LTC1731 6, 7

–

–

– – – ThinSOT LTC4056 6

~

– –

~ ~ ~ ~ ~ ~

* ~ ~ ~

‡

¶

~

– –

~ ~ ~

~ ~ ~ ~ ~

‡

‡

§

MSOP-10E LTC4064 6, 7

– DFN-6 LTC4059/A 6, 8

– ThinSOT LTC4057 6

~

~ ~

–

– –

– ThinSOT LTC4054L 6, 8

~

–

– – – – ThinSOT LTC1734 6, 7

~

~ ~

~

–

~ ~

~ ~ ~ ~ ~ ~

‡

§

~

* ~ ~ ~

§

~

§

2x3 DFN-8,

MSOP-8E

2x3 DFN-8,

MSOP-8E

– DFN-6 LTC4059/A 6

– DFN-6 LTC4065L/LX 6, 8

~

~

~ ~

–

– – – –

– – – –

~ ~

~ ~ ~ ~ ~

‡

~

500mA With External PFET

††

– – – – ThinSOT LTC1734L 6, 8

Gas Gauge Capability,

**

~

–

PROG Pin Tracks Charge Current,

#

§

~

Timer + Current Indication,

¶

µC,

§

Timer,

‡

Standalone

(Max), A

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~ ~

~ ~ ~

††

Battery Charge Current

Current C/x,

†

(Series)

Battery Charge Termination & Integration Status Signals Temperature Control Package Part Number Page Number

MASTER INDEX—Power Managers and Linear Battery Chargers (Continued)

Number of Battery Cells

Li-Ion/Polymer 4.2V/Cell & 4.1V/Cell Linear Battery Chargers

1 0.95

1 0.95

1 0.95

1 0.95

1 0.95

1, 2 2

1 0.8

1, 2 2

1 1.5

1 0.75

1 0.75

1 0.7

1 0.9 –

1 0.8 –

1 1

1 0.7 –

Li-Ion/Polymer Coin Cell Battery Chargers

1 0.15

1 0.9 –

1 0.25

1 50mA

1 50mA

* Current C/10,

1 0.18 –

Page

Number

M A S T E R I N DE X — S WI T C H M O DE BAT TE R Y CH A R G ER S

9

9

9

LTC4060

Linear

LT1571 14

LTC4002 14

27

Integration/Features

Switch Mode

Switch Mode

Most Least

TSSOP-20E LTC4011

TSSOP-16E LTC4010

DFN-16

TSSOP-16

QFN-36 LT3651-4.x 7, 14

QFN-36 LT3651-8.x 7, 14

SSOP-24 LTC4001/-1 7, 14

DFN-12 LT3650 7, 14

SSOP-24 LTC4007 7, 14

SSOP-16 LTC4006 14

~

~

Thermistor Interface

–

~

–

–

~

~

~

–

–

–

SSOP-28

DFN-10

~

SO-8

Thermal Regulation

– – – SSOP-16

¶,††

– –

PROG Pin Tracks Charge Current

‡‡

~

~

–

for Li-Ion Termination, use LTC1729,

††

– –

~

‡

~

T, t, -dV, dT/dt, ** Timer + Current,

#

~

AC Present Signal

~ ~

~ ~

End-of-Charge Signal

Monitor

‡‡

CHARGE

I

Transistor

– –

~ ~

– –

– –

~ ~ ~ ~

–

Integrated Power

#

#

§

** ~

~ ~ ~

~ ~ ~ ~

–

– –

– –

~ ~ ~

~ ~ ~

–

–

~

‡

** ~

‡

** ~

– – – – – – SSOP-24 LTC1980 7

‡

‡

Charge Termination

T, t, -dV ,

§

~ ~

µC,

¶

Timer,

‡

Standalone

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

~ ~

Current (Max), A
Battery Charge

Current C/x,

†

Cells (Series)

MASTER INDEX—Switch Mode Battery Chargers

Battery Charge Termination & Integration Status Signals Temperature Control Package Part Number

Number of Battery

NiMH/NiCd Battery Chargers

1-16 4

1-4 2

Li-Ion/Polymer Switch Mode Battery Chargers

1 4

2 4

1 2

1-16 4

1-2 2

1-2 2

1-2, adj 1.5 –

2-4 4

3-4 4

1-2 4

* Current C/10,

M A S T E R I N DE X — S WI T C H M O DE BAT TE R Y CH A R G ER S

28

Page

Number

16

7, 9, 14

7, 9, 14

Integration/Features

Most Least

QFN-38 LTC4110 7, 15, 16

Interface

~

Thermistor

–

Thermal Regulation

Signal

~

AC Present

LT1513 9, 15

LT1769 9, 14

1/-2/-3

1/-2

LT3652HV 14

LT3652 14

LT1510 9, 14

LT1571 14

LTC1960 7, 9, 14,

TSSOP-48 LTC1760 7, 16

SSOP-36 LTC1759 9, 16

SSOP-24 LTC4100 7, 16

SSOP-24 LTC4101 16

~

~

~

~

–

–

–

~

~

~

QFN-38

– – – SSOP-28 LT1505 9, 14

3x3 DFN-12

MSOP-12E

~ ~

–

3x3 DFN-12

MSOP-12E

~ ~

–

– QFN-20 LTC4012/-

~ ~

– QFN-20 LTC4009/-

~ ~

SSOP-20 LTC4008 7, 9, 14

TO-220

SSOP-28

SSOP-28

~

–

SSOP-16

SO-16

PROG Pin Tracks Charge Current

‡‡

Status

Signals Temperature Control Package Part Number

‡‡

Signal
End-of-Charge

Monitor

CHARGE

I

Transistor

– – –

Integrated Pass

Method(s)

‡,¶

Termination
Charge

SMBus

~

Standalone

– – – – –

¶

SMBus

~

– – –

¶

SMBus

~

– – –

¶

SMBus

~

– – –

¶

SMBus

~

~

~

–

– – – – – – SSOP-36

– –

¶

¶,††

** ~

~

~ ~

–

~

–

** ~

~ ~

–

~ ~

– – – – – SO-24 LT1511 9, 14

– – – – – SO-8 LT1512 9, 15

– – – – – DD Pak

– – – – – TSSOP-20

– – – – – TSSOP-16

¶,††

– – – – – SO-8

~

~

¶,††

~

~

for Li-Ion Termination, use LTC1729 ,

††

T, t, -dV, dT/dt, ** Timer + Current,

#

T, t, -dV ,

§

µC ,

¶

Timer,

‡

~

~

–

–

– –

~

~

~

~

¶

¶

¶

¶,††

¶,††

¶,††

~

~

~

~

~

¶,††

~

~

Current (Max), A
Battery Charge

BAT

V

Battery Charge Termination & Integration

MASTER INDEX—Switch Mode Battery Chargers (Continued)

Smart Battery Chargers

Range, V

3.5-18 3

3.5-28 4

3.0-5.5 4

Lead Acid, Li-Ion/Polymer, NiMH/NiCd Switch Mode Battery Chargers

3-21 8

3.5-26 4

3.5-28 8 – SPI

2.5-23 8 –

3.3-14.4 2

3.3-18 2

2-28 4 –

2-28 4 –

3-28 4

2.5-26 3 –

1.5-20 0.75 –

1.5-20 2 –

2.5-26 2 –

2.5-26 1.5 –

2.5-26 1 –

Current C/x,

†

* Current C/10,

M A S T E R I N DE X — M ULT I F U NC T I O N P MI C s

29

Page #

Part Number

Package

Integration/Features

Most Least

Interface

7, 11

LTC4080 13

1/-3

10,

3x3 QFN-20 LTC3558 13

C 4x6 QFN-38 LTC3576/-1 7, 11

2

– 4x7 QFN-44 LTC3577/-1/-3/-4 7, 12

– 4x7 QFN-44 LTC3677/-3 12

I

C 4x5 QFN-28 LTC3556 11

2

– 4x4 QFN-28 LTC3557/-1 7, 12

C 4x5 QFN-24 LTC3555/-

2

C 4x4 QFN-24 LTC3567 11

2

MSOP-10E

(V)
Input Voltage

Diode
Ideal

Topology
PowerPath

(A)
Charge Current
Maximum

1.5 Switch Mode Int + Ext (opt.) 5, USB, Li Ion – 4x6 QFN-38 LTC3586/-1 7, 11

Charger
Li-Ion/Polymer

OUT

)

LDO(s) (I

OUT

(I

)

(BB)/ Boost
Buck-Boost

3.3V, 20mA Sync Buck

1A BB,

+ Linear

0.8A

Boost

Hi-V Bat-Track,

2 x 150mA Linear 1.5 Linear Int + Ext (opt.) 5, USB, Li Ion,

10-LED

Boost

OVP

Hi-V Bat-Track,

– 2 x 150mA Linear 1.5 Linear Int + Ext (opt.) 5, USB, Li Ion,

OVP

1.5 Switch Mode Int + Ext (opt.) 5, USB, Li-Ion,

– 3.3V, 20mA Sync Buck

Hi-V 38V with

60V transients;

+ Linear

OVP: 68V

5, USB, Li Ion I

1.5 Switch Mode Int + Ext (opt.)

1A BB 3.3V, 25mA Sync Buck

+ Linear

Hi-V 38V max

1.5 Switch Mode Int + Ext (opt.) 5, USB, Li Ion I

+ Linear

Linear 0.5 Linear – 5, USB, Li Ion – 4x4 QFN-24 LTC3455/-1 7, 12

Block for

LDO

Controller

– 3.3V, 25mA Linear 1.5 Linear Int + Ext (opt.) 5, USB, Li Ion,

– 3.3V, 25mA Sync Buck

– Flexible Gain

1.5 Switch Mode Int + Ext (opt.) 4.25 to 5.5 I

1.5 Switch Mode Int + Ext (opt.) 4.25 to 5.5 – 4x4 QFN-24 LTC3566 11

+ Linear

+ Linear

– – Linear 0.95 – – 4.25 to 8 – 3x5 DFN-16 LTC3552/-1 13

– – Linear 0.5 Linear – 4.35V to 5.5V – 3x3 QFN-20 LTC3554 12

– – Linear 0.95 – – 5, USB – 3x3 QFN-16 LTC3559/-1 7, 13

OUT

)

Onboard Regulators Battery Charger/Power Manager Other Features

MASTER INDEX—Multifunction PMICs

Buck(s) (I

Regulators
Number of

Li-Ion/Polymer Multifunction Power Management Integrated Circuits (PMICs)

x 2

5 400mA

5 600mA,

400mA

x 2

4 600mA,

400mA

x 2

x 2,

4 400mA

1A

x 2

4 400mA

400mA

4 600mA,

400mA

x 2

x 2

600mA

4 1A,

3 400mA,

2 – 1A BB 3.3V, 25mA Sync Buck

2 – 1A BB 3.3V, 25mA Sync Buck

x 2

2 200mA

2 400mA 0.4A BB – Linear 0.95 – – 5, USB –

2 200mA – 150mA Linear 0.5 Linear – 4.35V to 5.5V – 3x3 QFN-20 LTC3553 12

2 400mA

800mA

x 2

1 300mA – – Linear 0.5 – – 2.7 to 4.5 – 3x3 DFN-

1 600mA – – Linear 0.95 – – 4.3 to 8 – 3x5 DFN-16 LTC3550/-1 13

2 400mA,

1 300mA – – Linear 0.5 – – 2.7 to 4.5 – 3x3 DFN-10 LTC4081 13

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