MAXIM MAX8819A, MAX8819D Technical data

General Description

The MAX8819_ is a complete power solution for MP3
players and other handheld applications. The IC
includes a battery charger, step-down converters, and
WLED power. It features an input current-limit switch to
power the IC from an AC-to-DC adapter or USB port, a
1-cell lithium ion (Li+) or lithium polymer (Li-Poly) charg­er, three step-down converters, and a step-up converter
with serial step dimming for powering two to six white
LEDs. All power switches for charging and switching the
system load between battery and external power are
included on-chip. No external MOSFETs are required.
The MAX8819C/MAX8819D offer a sequenced power­up/power-down of OUT1, OUT2, and then OUT3.

Maxim’s Smart Power Selector™ makes the best use of
AC-to-DC adapter power or limited USB power. Battery
charge current and input current limit are independent­ly set. Input power not used by the system charges the
battery. Charge current is resistor programmable and
the input current limit can be selected as 100mA,
500mA, or 1A. Automatic input selection switches the
system load from battery to external power. In addition,
on-chip thermal limiting reduces the battery charge rate
to prevent charger overheating.

Applications

MP3 Players

Portable GPS Devices

Low-Power Handheld Products

Cellular Telephones

Digital Cameras

Handheld Instrumentation

PDAs

Features

♦ Smart Power Selector
♦ Operates with No Battery Present
♦ USB/AC Adapter One-Cell Li+ Charger
♦ Three 2MHz Step-Down Converters

95% Peak Efficiency
100% Duty Cycle
±3% Output Accuracy over Load/Line/

Temperature

♦ 2 to 6 Series WLED Driver with Dimming Control
♦ RST1 Output
♦ Short-Circuit/Thermal-Overload/Input

Undervoltage/Overvoltage Protection

♦ Power-Up Sequencing (MAX8819C/MAX8819D)
♦ Total Solution Size: Less Than 90mm

2

MAX8819A–MAX8819D

PMIC with Integrated Chargers and Smart

Power Selector in a 4mm x 4mm TQFN

________________________________________________________________

Maxim Integrated Products

1

19-4166; Rev 0; 6/08

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

Pin Configuration appears at end of data sheet.

Smart Power Selector is a trademark of Maxim Integrated
Products, Inc.

USB/AC-TO-DC

ADAPTER

ENABLE SYSTEM

ENABLE CHARGER

ENABLE BACKLIGHT

SYS

DC

DLIM1

DLIM2

EN123

CEN

EN4

LX4

OVP4

FB4

LX3

LX2

CISET

BAT

SYS

Li+/Li-Poly
BATTERY

OUT1
I/O

OUT2
MEMORY

OUT3
CORE

CHG CHG

LX1

RST1

RST1

MAX8819_

+

Typical Operating Circuit

Ordering Information

+

Denotes a lead-free/RoHS-compliant package.

*

Future product—contact factory for availability.

**

EP = Exposed pad.

PART

TEMP RANGE

PIN­PACKAGE

SYS

VOLTAGE

(V)

MAX8819AETI+

4.35

MAX8819BETI+

5.3

MAX8819CETI+

4.35

MAX8819DETI+

5.3

EVALUATION KIT

AVAILABLE

-40°C to +85°C 28 TQFN-EP**

-40°C to +85°C 28 TQFN-EP**

-40°C to +85°C 28 TQFN-EP**

-40°C to +85°C 28 TQFN-EP**

MAX8819A–MAX8819D

PMIC with Integrated Chargers and Smart
Power Selector in a 4mm x 4mm TQFN

2 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS

(DC, LX_ unconnected; VEP= V

GND

= 0V, V

BAT

= 4V, DLIM[1:2] = 00, EN123 = EN4 = low, V

FB1

= V

FB2

= V

FB3

= 1.1V, V

FB4

= 0.6V,

PV13 = PV2 = SYS, T

A

= -40°C to +85°C, capacitors as shown in Figure 1, R

CISET

= 3kΩ, unless otherwise noted.) (Note 3)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

ABSOLUTE MAXIMUM RATINGS

DC, SYS, BAT, CISET, DLIM1, DLIM2, EN123

CEN, EN4, CHG, RST1, FB1, FB2, FB3 to GND....-0.3V to +6V

PV2 to GND...............................................-0.3V to (V

SYS

+ 0.3V)

PV13 to SYS...........................................................-0.3V to +0.3V

PG1, PG2, PG3, PG4 to GND................................-0.3V to +0.3V

COMP4, FB4 to GND ................................-0.3V to (V

SYS

+ 0.3V)

LX4 to PG4 .............................................................-0.3V to +33V

OVP4 to GND .........................................................-0.3V to +33V

LX1, LX2, LX3 Continuous Current (Note 1) .........................1.5A

LX4 Current ................................................................750mA

RMS

Output Short-Circuit Duration.....................................Continuous

Continuous Power Dissipation (T

A

= +70°C)
28-Pin Thin QFN Single-Layer Board (derate 20.8mW/°C

above +70°C)...........................................................1666.7mW

28-Pin Thin QFN Multilayer Board (derate 28.6mW/°C

above +70°C)...........................................................2285.7mW

Junction-to-Case Thermal Resistance (θ

JC

) (Note 2)

28-Lead Thin QFN...........................................................3°C/W

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature........................................-40°C to +125°C

Storage Temperature.........................................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Note 1: LX1, LX2, LX3 have clamp diodes to their respective PG_ and PV_. Applications that forward bias these diodes must take

care not to exceed the package power dissipation limits.

Note 2: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer

board. For detailed information on package thermal considerations, refer to http://www.maxim-ic.com/thermal-tutorial

.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DC POWER INPUT

DC Voltage Range V

SYS Regulation Voltage V

DC Undervoltage Threshold V

DC Overvoltage Threshold V

DC Current Limit
(Note 4)

DC Quiescent Current I

DC-to-SYS Dropout Resistance R

DC-to-SYS Soft-Start Time t

DC Thermal-Limit Temperature

DC Thermal-Limit Gain

SYSTEM

System Operating Voltage Range V

DC

SYS_REGVDC

UVLO_DCVDC

OVLO_DCVDC

VDC = 5.75V, V

I

DCLIM

DCIQ

SS-D-S

SYS

for MAX8819B/MAX8819D
or V
MAX8819A/MAX8819C

DLIM[1:2] = 11 (suspend) 0.02 0.035

DLIM[1:2] ≠ 11, I
EN123 = low, EN4 = low, CEN = high,
V

DC

DLIM[1:2] ≠ 11, I
EN4 = low, CEN = low, V

VDC = 4V, I

DS

Die temperature where current limit is
reduced

Amount of input current reduction above
thermal-limit temperature

= 5.75V

rising, 500mV typical hysteresis 3.95 4.00 4.05 V

rising, 300mV typical hysteresis 5.811 5.9 6.000 V

= 4V for

SYS

= 5.5V

MAX8819A/MAX8819C 4.3 4.35 4.4

MAX8819B/MAX8819D 5.1 5.3 5.5

= 5V

SYS

= 0mA, I

SYS

= 0mA, EN123 = low,

SYS

= 400mA, DLIM[1:2] = 01 0.330 0.700 Ω

SYS

DLIM[1:2] = 10 90 95 100

DLIM[1:2] = 01 450 475 500

DLIM[1:2] = 00 900 1000 1100

= 0mA,

BAT

= 5.5V

DC

4.1 5.5 V

2.6 5.5 V

1.33

0.95

1.5 ms

100 °C

5%/°C

V

mA

mA

MAX8819A–MAX8819D

PMIC with Integrated Chargers and Smart

Power Selector in a 4mm x 4mm TQFN

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(DC, LX_ unconnected; VEP= V

GND

= 0V, V

BAT

= 4V, DLIM[1:2] = 00, EN123 = EN4 = low, V

FB1

= V

FB2

= V

FB3

= 1.1V, V

FB4

= 0.6V,

PV13 = PV2 = SYS, T

A

= -40°C to +85°C, capacitors as shown in Figure 1, R

CISET

= 3kΩ, unless otherwise noted.) (Note 3)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

System Undervoltage Lockout
Threshold

BAT-to-SYS Reverse Regulation
Voltage

Quiescent Current IPV+I

BATTERY CHARGER (VDC = 5.0V)

BAT-to-SYS On-Resistance R

BAT Regulation Voltage
(Figure 2)

BAT Recharge Threshold (Note 4) -135 -100 -65 mV

BAT Prequalification Threshold V

R

Resistance Range

CISET

CISET Voltage V

BAT Fast-Charge Current Limit

BAT Prequalification Current V

Top-Off Threshold (Note 5) TA = +25°C, R

BAT Leakage Current

V

V

UVLO_SYSVSYS

DC and BAT are delivering current to SYS;

V

BSRED

I

BAT

MAX8819A/MAX8819C (only)

VDC = 0V, EN123 = low, EN4 = low,
V

BAT

VDC = 5V, DLIM[1:2] = 11, EN123 = low,
EN4 = low, V

VDC = 0V, EN123 = high, EN4 = low,

SYS

V

BAT

dropout)

VDC = 0V, EN123 = high, EN4 = high,
V

BAT

dropout)

BS

BATREG

BATPRQVBAT

VDC = 0V, V

TA = +25°C 4.174 4.200 4.221

TA = -40°C to +85°C 4.158 4.200 4.242

Guaranteed by BAT fast-charge current
limit

CISET

R

CISET

DLIM[1:2] = 10, R

DLIM[1:2] = 01, R

DLIM[1:2] = 00, R

DLIM[1:2] = 00, R

DLIM[1:2] = 00, R

BAT

VDC = 0V, EN123 = low, EN4 = low,
CEN = low, V

V

DC

EN4 = low, V

falling, 100mV hysteresis 2.45 2.5 2.55 V

= 95mA; V

= 4V

= 4V (step-down converters are not in

= 4V (step-down converters are not in

DC

BAT

BAT

= 4.3V,

= 4V

= 4.2V, I

50 66 90 mV

10 20

010

128 290

362 730

= 0.9A 0.073 0.165 Ω

SYS

rising, 180mV hysteresis, Figure 2 2.9 3.0 3.1 V

315kΩ

= 7.5kΩ, I

= 2.5V, R

= 5V, DLIM[1:2] = 11, EN123 = low,

= 267mA 0.9 1.0 1.1 V

BAT

= 3kΩ 87 92 100

CISET

= 3kΩ 450 472 500

CISET

= 15kΩ 170 200 230

CISET

= 7.5kΩ 375 400 425

CISET

= 3.74kΩ 740 802 860

CISET

= 3.74kΩ 60 82 105 mA

CISET

= 3.74kΩ 60 82 105 mA

CISET

BAT

BAT

= 4V

= 4V

10 20

0

μA

V

mA

μA

MAX8819A–MAX8819D

PMIC with Integrated Chargers and Smart
Power Selector in a 4mm x 4mm TQFN

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(DC, LX_ unconnected; VEP= V

GND

= 0V, V

BAT

= 4V, DLIM[1:2] = 00, EN123 = EN4 = low, V

FB1

= V

FB2

= V

FB3

= 1.1V, V

FB4

= 0.6V,

PV13 = PV2 = SYS, T

A

= -40°C to +85°C, capacitors as shown in Figure 1, R

CISET

= 3kΩ, unless otherwise noted.) (Note 3)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Charger Soft-Start Time t

Timer Accuracy +15 %

Timer Suspend Threshold

Timer Extend Threshold

Prequalification Time t

Fast-Charge Time t

Top-Off Time t

POWER SEQUENCING (Figures 6 and 7)

REG1, REG2, REG3 Soft-Start
Time

REG4 Soft-Start Time t

REGULATOR THERMAL SHUTDOWN

Thermal Shutdown Temperature TJ rising +165 °C

Thermal Shutdown Hysteresis 15 °C

REG1–SYNCHRONOUS STEP-DOWN CONVERTER

Input Voltage PV13 supplied from SYS V

Maximum Output Current

Short-Circuit Current L = 4.7μH, R

Short-Circuit Detection Threshold 230 mV

Short-Circuit Foldback Frequency f

FB1 Voltage (Note 7) 0.997 1.01 1.028 V

Output Voltage Range 1V

FB1 Leakage Current V

Load Regulation I

Line Regulation (Note 9) 1 %/D

p-Channel On-Resistance V

n-Channel On-Resistance V

p-Channel Current-Limit
Threshold

SS_CHG

t

SS1

t

SS3

SS4

PQ

FC

TO

, t

Slew rate 333 mA/ms

Time from 0 to 500mA 1.5

Time from 0 to 100mA 0.3

Time from 100mA to 500mA 1.2

CISET voltage when the fast-charge timer
suspends; 300mV translates to 20% of the
maximum fast-charge current limit

CISET voltage when the fast-charge timer
extends; 750mV translates to 50% of the
maximum fast-charge current limit

,

SS2

C

L = 4.7μH,
R
(Note 6)

MAX8819A/MAX8819B 0.565 0.600 0.640

MAX8819C/MAX8819D 0.615 0.650 0.750

= 0.022μF to GND 5 ms

COMP4

= 0.13Ω

LSR

= 0.13Ω 600 mA

LSR

= 1.01V

FB1

= 100mA to 300mA 1 %

OUT1

= 4.0V, I

PV13

PV13

= 4.0V, I

LX1

LX1

MAX8819A/MAX8819B 400

MAX8819C/MAX8819D 550

TA = +25°C -50 -5 +50

T

A

= 180mA 190 mΩ

= 180mA 250 mΩ

250 300 350 mV

700 750 800 mV

33 min

660 min

33 min

2.6 ms

SYS

/3 Hz

OSC

= +85°C -10

SYS

ms

V

mA

V

nA

A

MAX8819A–MAX8819D

ELECTRICAL CHARACTERISTICS (continued)

(DC, LX_ unconnected; VEP= V

GND

= 0V, V

BAT

= 4V, DLIM[1:2] = 00, EN123 = EN4 = low, V

FB1

= V

FB2

= V

FB3

= 1.1V, V

FB4

= 0.6V,

PV13 = PV2 = SYS, T

A

= -40°C to +85°C, capacitors as shown in Figure 1, R

CISET

= 3kΩ, unless otherwise noted.) (Note 3)

PMIC with Integrated Chargers and Smart

Power Selector in a 4mm x 4mm TQFN

_______________________________________________________________________________________ 5

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Skip-Mode Transition Current (Note 8) 80 mA

n-Channel Zero-Crossing
Threshold

Maximum Duty Cycle 100 %

Minimum Duty Cycle 12.5 %

PWM Frequency f

Internal Discharge Resistance in
Shutdown

REG2–SYNCHRONOUS STEP-DOWN CONVERTER

Input Voltage PV2 supplied from SYS V

Maximum Output Current

Short-Circuit Current L = 4.7μH, R

Short-Circuit Detection Threshold 230 mV

Short-Circuit Foldback Frequency f

FB2 Voltage (Note 7) 0.997 1.012 1.028 V

Output Voltage Range 1V

FB2 Leakage Current V

Load Regulation I

Line Regulation (Note 9) 1 %/D

p-Channel On-Resistance V

n-Channel On-Resistance V

p-Channel Current-Limit
Threshold

Skip-Mode Transition Current (Note 8) 80 mA

n-Channel Zero-Crossing
Threshold

Maximum Duty Cycle 100 %

Minimum Duty Cycle 12.5 %

PWM Frequency f

Internal Discharge Resistance in
Shutdown

REG2 Disable ΔI

REG3–SYNCHRONOUS STEP-DOWN CONVERTER

Input Voltage PV13 supplied from SYS V

OSC

OSC

SYS

EN123 = low, resistance from LX1 to PG1 1.0 kΩ

L = 4.7μH,

= 0.13Ω

R

LSR

(Note 6)

= 0.13Ω 600 mA

LSR

= 1.01V

FB2

= 100mA to 300mA 1 %

OUT2

= 4.0V, I

PV2

= 4.0V, I

PV2

MAX8819A/MAX8819B 0.512 0.550 0.595

MAX8819C/MAX8819D 0.565 0.600 0.700

EN123 = low, resistance from LX2 to PG2 1.0 kΩ

V

= 0V, REG2 disabled (Note 10) -25 μA

PV2

= 180mA 290 mΩ

LX2

= 180mA 200 mΩ

LX2

MAX8819A/MAX8819B 300

MAX8819C/MAX8819D 500

TA = +25°C -50 -5 +50

= +85°C -50

T

A

1.8 2.0 2.2 MHz

1.8 2.0 2.2 MHz

10 mA

SYS

/3 Hz

OSC

SYS

10 mA

SYS

mA

nA

V

V

A

V

MAX8819A–MAX8819D

PMIC with Integrated Chargers and Smart
Power Selector in a 4mm x 4mm TQFN

6 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(DC, LX_ unconnected; VEP= V

GND

= 0V, V

BAT

= 4V, DLIM[1:2] = 00, EN123 = EN4 = low, V

FB1

= V

FB2

= V

FB3

= 1.1V, V

FB4

= 0.6V,

PV13 = PV2 = SYS, T

A

= -40°C to +85°C, capacitors as shown in Figure 1, R

CISET

= 3kΩ, unless otherwise noted.) (Note 3)

Maximum Output Current

Short-Circuit Current L = 4.7μH, R

Short-Circuit Detection Threshold 230 mV

Short-Circuit Foldback Frequency f

FB3 Voltage (Note 7) 0.997 1.01 1.028 V

Output Voltage Range 1V

FB3 Leakage Current V

Load Regulation I

Line Regulation (Note 9) 1 %/D

p-Channel Current-Limit
Threshold

Skip-Mode Transition Current (Note 8) 80 mA

n-Channel Zero-Crossing
Threshold

p-Channel On-Resistance V

n-Channel On-Resistance V

Maximum Duty Cycle 100 %

Minimum Duty Cycle 12.5 %

PWM Frequency f

Internal Discharge Resistance in
Shutdown

REG4–STEP-UP CONVERTER

Input Voltage Power supplied from SYS (see Figure 1) 2.4 5.5 V

Output Voltage Range V

FB4 Regulation Voltage V

FB4 Leakage REG4 disabled (EN4 = low) -0.050 +0.005 +0.050 μA

Switching Frequency 0.9 1 1.1 MHz

Minimum Duty Cycle 5%

Maximum Duty Cycle 90 94 %

OVP4 Overvoltage Detection

OVP4 Input Current OVP4 = SYS, EN4 = high 4 μA

OVP4 Leakage Current

n-Channel On-Resistance V

n-Channel Off-Leakage Current V

n-Channel Current Limit 555 695 950 mA

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

OSC

OUT4

V

FB4

OVP

L = 4.7μH,

= 0.13Ω

R

LSR

(Note 6)

= 0.13Ω 600 mA

LSR

= 1.01V

FB3

= 100mA to 300mA 1.3 %

OUT3

MAX8819A/MAX8819B 0.512 0.550 0.595

MAX8819C/MAX8819D 0.565 0.600 0.700

= 4.0V, I

PV13

= 4.0V, I

PV13

EN123 = low, resistance from LX3 to PG3 1.0 kΩ

No dimming 475 500 525 mV

REG4 disabled (EN4 = low),
OVP4 = SYS

= 4.0V, I

SYS

= 28V -1 +0.001 +1 μA

LX4

LX3

LX3

= 200mA 395 mΩ

LX4

MAX8819A/MAX8819B 300

MAX8819C/MAX8819D 500

TA = +25°C -50 -5 +50

T

= +85°C -50

A

= 180mA 290 mΩ

= 180mA 120 mΩ

1.8 2.0 2.2 MHz

V

SYS

24 25 26 V

-1 +0.001 +1 μA

/3 Hz

OSC

SYS

10 mA

24 V

mA

V

nA

A

MAX8819A–MAX8819D

PMIC with Integrated Chargers and Smart

Power Selector in a 4mm x 4mm TQFN

_______________________________________________________________________________________ 7

ELECTRICAL CHARACTERISTICS (continued)

(DC, LX_ unconnected; VEP= V

GND

= 0V, V

BAT

= 4V, DLIM[1:2] = 00, EN123 = EN4 = low, V

FB1

= V

FB2

= V

FB3

= 1.1V, V

FB4

= 0.6V,

PV13 = PV2 = SYS, T

A

= -40°C to +85°C, capacitors as shown in Figure 1, R

CISET

= 3kΩ, unless otherwise noted.) (Note 3)

Note 3: Limits are 100% production tested at TA= +25°C. Limits over the operating temperature range are guaranteed through cor-

relation using statistical quality control (SQC) methods.

Note 4: The charger transitions from done to fast-charge mode at this BAT recharge threshold.
Note 5: The charger transitions from fast-charge to top-off mode at this top-off threshold (Figure 2).
Note 6: The maximum output current is guaranteed by correlation to the p-channel current-limit threshold, p-channel on-resistance,

n-channel on-resistance, oscillator frequency, input voltage range, and output voltage range. The parameter is stated for
a 4.7μH inductor with 0.13Ω series resistance. See the

Step-Down Converter Maximum Output Current

section for more

information.

Note 7: The step-down output voltages are 1% high with no load due to the load-line architecture.
Note 8: The skip-mode current threshold is the transition point between fixed-frequency PWM operation and skip-mode operation.

The specification is given in terms of output load current for inductor values shown in the typical application circuit (Figure 1).

Note 9: Line regulation for the step-down converters is measured as ΔV

OUT

/ΔD, where D is the duty cycle (approximately

V

OUT/VIN

).

Note 10: REG2 is disabled by connecting PV2 to ground, decreasing the quiescent current.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

LED DIMMING CONTROL (EN4)

EN4 Low Shutdown Delay t

EN4 High Enable Delay (Figure 8) t

EN4 Low Time t

EN4 High Time t

RESET (RST)

Reset Trip Threshold V

Reset Deassert Delay Time t

Reset Glitch Filter t

LOGIC (DLIM1, DLIM2, EN123, EN4, CHG, RST1)

Logic Input-Voltage Low VDC = 4.1V to 5.5V, V

Logic Input-Voltage High VDC = 4.1V to 5.5V, V

Logic Input Pulldown Resistance V

Logic Leakage Current V

Logic Output Voltage Low I

Logic Output-High Leakage
Current

SHDN

H_INIT

THRST

DRST

GLRST

LO

HI

Voltage from FB1 to GND, V
50mV hysteresis

= 0.4V to 5.5V, CEN, EN123, EN4 400 760 1200 kΩ

LOGIC

= 0 to 5.5V, DLIM1, DLIM2 -1.0 +0.001 +1.0 μA

LOGIC

= 1mA 7 15 mV

SINK

V

= 5.5V -1.0 +0.001 +1.0 μA

LOGIC

falling,

FB1

= 2.6V to 5.5V 0.4 V

SYS

= 2.6V to 5.5V 1.2 V

SYS

100 μs

0.5 500 μs

0.5 μs

0.765 0.858 0.945 V

180 200 220 ms

2 3.2 ms

50 μs

MAX8819A–MAX8819D

PMIC with Integrated Chargers and Smart
Power Selector in a 4mm x 4mm TQFN

8 _______________________________________________________________________________________

Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

BATTERY LEAKAGE CURRENT

vs. BATTERY VOLTAGE

BATTERY VOLTAGE (V)

BATTERY LEAKAGE CURRENT (nA)

MAX8819A toc04

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

0

100

200

300

400

500

600

700

800

900

1000

VDC = 0V
EN123 = 1

CHARGE CURRENT

vs. BATTERY VOLTAGE

BATTERY VOLTAGE (V)

CHARGE CURRENT (mA)

MAX8819A toc05

034215

0

50

100

150

200

250

300

350

400

450

500

R

CISET

= 6.8kΩ

R

CISET

= 15kΩ

BATTERY REGULATION VOLTAGE

vs. TEMPERATURE

TEMPERATURE (°C)

BATTERY REGULATION VOLTAGE (V)

MAX8819A toc06

-40 -15 10 35 60 85

4.15

4.16

4.17

4.18

4.19

4.20

4.21

4.22

4.23

4.24

4.25

SYSTEM VOLTAGE

vs. SYSTEM CURRENT

OUTPUT CURRENT (mA)

SYSTEM VOLTAGE (V)

MAX8819A toc07

0 100 200 300 400 500 600 700 800 900 1000

3.88

3.90

3.92

3.94

3.96

3.98

4.00

4.02

DC UNCONNECTED
V

BATT

= 4V

SYSTEM VOLTAGE

vs. SYSTEM CURRENT

OUTPUT CURRENT (mA)

SYSTEM VOLTAGE (V)

MAX8819A toc08

0 100 200 300 400 500 600 700 800 900 1000

3.8

3.9

4.0

4.1

4.2

4.3

4.4

4.5
VDC = 5.1V
V

BATT

= 4V

DLIM[1:2] = 10

QUIESCENT CURRENT vs.

SUPPLY VOLTAGE (CHARGER ENABLED)

1.2

1.0

0.8

0.6

0.4

QUIESCENT CURRENT (mA)

0.2

0

0123456

RISING

FALLING

SUPPLY VOLTAGE (V)

1.2

1.0

MAX8819A toc01

0.8

0.6

0.4

QUIESCENT CURRENT (mA)

0.2

0

0123456

QUIESCENT CURRENT vs. VDC

CHARGER DISABLED

FALLING

DC VOLTAGE, VDC (V)

RISING

1000

900

MAX8819A toc02

800

700

600

500

400

300

200

BATTERY LEAKAGE CURRENT (nA)

100

BATTERY LEAKAGE CURRENT

vs. BATTERY VOLTAGE

VDC = 5V
EN123 = 1

0

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

MAX8819A toc03

BATTERY VOLTAGE (V)

MAX8819A–MAX8819D

PMIC with Integrated Chargers and Smart

Power Selector in a 4mm x 4mm TQFN

_______________________________________________________________________________________ 9

Typical Operating Characteristics (continued)

(TA = +25°C, unless otherwise noted.)

SYSTEM VOLTAGE

vs. SYSTEM CURRENT

4.5

4.4

4.3

4.2

4.1

SYSTEM VOLTAGE (V)

4.0

VDC = 5.1V

3.9

3.8

= 4V

V

BATT

DLIM[1:2] = 01

0 100 200 300 400 500 600 700 800 900 1000

OUTPUT CURRENT (mA)

POWER-UP SEQUENCING
(MAX8819A/MAX8819B)

V

EN123

V

V1

MAX8819A toc11

MAX8819A toc09

2V/div

0V

2V/div

0V

V

DC

V

SYS

I

DC

I

BAT

V

V3

V

V2

AC-TO-DC ADAPTER CONNECT

CHARGING

4.3V

C

SYS

400μs/div

3.84V

C

DC

BATTERY CHARGER

SOFT-START

POWER-UP SEQUENCING
(MAX8819C/MAX8819D)

MAX8819A toc10

4V

CHARGING

NEGATIVE BATTERY

CURRENT FLOWS

INTO THE
BATTERY

1A

-1A

MAX8819A toc12

5V/div

2V/div

1A/div

1A/div

2V/div
0V

2V/div

0V

V

V2

V

V3

2ms/div

POWER-DOWN SEQUENCING

(MAX8819C/MAX8819D)

V

V3

V

V2

V

V1

V

RST1

100μs/div

MAX8819A toc13

IV3 = 200mA

= 180mA

I

V2

= 220mA

I

V1

2V/div
0V
2V/div
0V

2V/div
0V

2V/div

0V

2V/div

0V
2V/div
0V

V

V1

1ms/div

REG1 EFFICIENCY

vs. LOAD CURRENT (V

100

90

80

70

60

50

40

30

REG1 EFFICIENCY (%)

20

10

0

0.1 1 10 100 1000
LOAD CURRENT (mA)

REG1

= 3.01V)

2V/div

0V

MAX8819A toc14