Linear LTC4413-1, LTC4413-2 Schematic [ru]

LTC4413-1/LTC4413-2

Dual 2.6A, 2.5V to 5.5V

Fast Ideal Diodes

in 3mm × 3mm DFN

FEATURES

n

2-Channel Ideal Diode OR’ing or Load Sharing

n

Low Loss Replacement for PowerPath™ OR’ing

Diodes

n

Fast Response Replacement for LTC4413

n

Low Forward On-Resistance (140mΩ Max at 3.6V)

n

Low Reverse Leakage Current

n

Low Regulated Forward Voltage (18mV Typ)

n

Overvoltage Protection Sensor with Drive Output for

an External P-Channel MOSFET (LTC4413-2 Only)

n

2.5V to 5.5V Operating Range

n

2.6A Maximum Forward Current

n

Internal Current Limit Protection

n

Internal Thermal Protection

n

Status Output to Indicate if Selected Channel is

Conducting

n

Programmable Channel On/Off

n

Low Profi le (0.75mm) 10-Lead 3mm × 3mm DFN

Package

APPLICATIONS

n

Battery and Wall Adapter Diode OR’ing in Handheld

Products

n

Backup Battery Diode OR’ing

n

Power Switching

n

USB Peripherals

n

Uninterruptable Supplies

DESCRIPTION

The LTC®4413-1 and LTC4413-2 each contain two mono­lithic ideal diodes, each capable of supplying up to 2.6A
from input voltages between 2.5V and 5.5V. The ideal
diodes use a 100mΩ P-channel MOSFET to independently
connect INA to OUTA and INB to OUTB. During normal
forward operation, the voltage drops across each of
these diodes are regulated to as low as 18mV. Quiescent
current is less than 80μA for diode currents up to 1A. If
either of the output voltages exceeds its respective input
voltage, that MOSFET is turned off and less than 1μA of
reverse current fl ows from OUT to IN. Maximum forward
current in each MOSFET is limited to a constant 2.6A and
internal thermal limiting circuits protect the part during
fault conditions. An internal overvoltage protection sensor
detects when a voltage exceeds the LTC4413-2 absolute
maximum voltage tolerance.

Two active-high control pins independently turn off the two
ideal diodes contained within the LTC4413-1/LTC4413-2.
When the selected channel is reverse biased, or the
LTC4413-1/LTC4413-2 is put into low power standby, the
status signal is pulled low by an 11μA open drain.

The LTC4413-1/LTC4413-2 are housed in a 10-lead 3mm
× 3mm DFN package.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. PowerPath is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.

TYPICAL APPLICATION

Automatic Switchover from a Battery to a Wall Adapter

FDR8508

WALL

ADAPTER

INPUT

INA

0.1μF

1Ω

10μF

ENBA

GND

BAT

+

STAT IS HIGH WHEN WALL ADAPTER IS
SUPPLYING LOAD CURRENT

OVP IS HIGH WHEN WALL ADAPTER VOLTAGE > 6V

ENBB
INB

IDEAL

LTC4413-2

IDEAL

OUTA

STAT

OVI

OVP

OUTB

V

CC

441312 TA01a

470k

4.7μF

STAT

OVP

TO LOAD

Power Loss vs Load

700

600

500

400

300

1N5817

POWER LOSS (mW)

200

100

0

0

500 1000

LTC4413-1

2000 3000

1500 2500

LOAD (mA)

441312 TA01b

441312fd

1

LTC4413-1/LTC4413-2

(

(

ABSOLUTE MAXIMUM RATINGS

INA, INB, OUTA, OUTB, STAT,

ENBA, ENBB Voltage .................................... –0.3V to 6V

OVI, OVP Voltage ....................................... –0.3V to 13V

(Note 1)

Storage Temperature Range ..................–65°C to 125°C

Continuous Power Dissipation ..........................1500mW

(Derate 25mW/°C Above 70°C)

Operating Temperature Range .................–40°C to 85°C

PIN CONFIGURATION

LTC4413-1 LTC4413-2

TOP VIEW

10

INA

1

ENBA

2

11

3

GND

4

ENBB

5

INB

DD PACKAGE

3mm × 3mm) PLASTIC DFN

10-LEAD

T

= 125°C, θJA = 43°C/W

EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB

JMAX

OUTA

9

STAT

NC

8

7

NC

6

OUTB

TOP VIEW

10

INA

1

ENBA

2

11

3

GND

4

ENBB

5

INB

DD PACKAGE

3mm × 3mm) PLASTIC DFN

10-LEAD

T

= 125°C, θJA = 43°C/W

EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB

JMAX

OUTA

9

STAT

OVI

8

7

OVP

6

OUTB

ORDER INFORMATION

LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE

LTC4413EDD-1#PBF LTC4413EDD-1#TRPBF LCPP

LTC4413EDD-2#PBF LTC4413EDD-2#TRPBF LCPQ

10-Lead (3mm × 3mm) Plastic DFN

10-Lead (3mm × 3mm) Plastic DFN

LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE

LTC4413EDD-1 LTC4413EDD-1#TR LCPP

LTC4413EDD-2 LTC4413EDD-2#TR LCPQ

10-Lead (3mm × 3mm) Plastic DFN

10-Lead (3mm × 3mm) Plastic DFN

Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/

For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/

ELECTRICAL CHARACTERISTICS

The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at TA = 25°C. (Notes 2, 6)

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

, V

V

IN

Operating Supply Range for Channel A or B VIN and/or V

OUT

Proper Operation

UVLO UVLO Turn-On Rising Threshold Max (V

UVLO Turn-Off Falling Threshold Max (V

I

QF

I

QRIN

I

QRGND

Quiescent Current in Forward Regulation,
Measured via GND

Current Drawn from or Sourced into IN
When V

is Greater than V

OUT

IN

Quiescent Current While in Reverse
Turn-Off, Measured via GND

V

= 3.6V, I

INA

I

= 0mA (Note 3)

INB

VIN = 3.6V, V

V

= V

INA

V

STAT

INA

INA

INB

= 0V

Must be in This Range for

OUT

, V

, V

, V

, V

= V

OUTB

OUTB

OUTA

)

)

INB

INB

OUTA

, V

, V

INB

OUTA

= 100mA, V

INA

= 5.5V (Note 6)

OUT

= 0V, V

OUTB

= 0V,

= 5.5V,

l

2.5 5.5 V

l

l

1.7 V

l

l

–1 2.5 4.5 μA

–40°C to 85°C

–40°C to 85°C

–40°C to 85°C

–40°C to 85°C

2.45 V

40 58 μA

28 36 μA

441312fd

2

LTC4413-1/LTC4413-2

ELECTRICAL CHARACTERISTICS

The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T

SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS

I

QROUTB

I

QOFF

V

RTO

V

FWD

R

FWD

R

ON

t

ON

t

OFF

Short-Circuit Response

I

OC

I

QOC

STAT Output

I

SOFF

I

SON

t

S(ON)

t

S(OFF)

ENB Inputs

V

ENBIH

V

ENBIL

V

ENBHYST

I

ENB

OVI Input (LTC4413-2 Only)

V

OVIH

V

OVIL

V

OVID

I

OVI

Quiescent Current While in Reverse
Turn-Off. Current Drawn from V

OUTA

When

OUTB Supplies Chip Power

Quiescent Current with Both ENBA and
ENBB High

Reverse Turn-Off Voltage (V

Forward Voltage Drop (VIN – V
at I

= –1mA

OUT

On-Resistance, R

Regulation

FWD

– VIN)V

OUT

)

OUT

(Measured as ΔV/ΔI)

On-Resistance, RON Regulation
(Measured as V/I at I

= 1A)

IN

PowerPath Turn-On Time VIN = 3.6V, from ENB Falling to I

PowerPath Turn-Off Time VIN = 3.6V, from ENB Rising with IIN = 100mA

Current Limit V

Quiescent Current While in Overcurrent
Operation

STAT Off Current Shut Down

STAT Sink Current VIN > V

STAT Pin Current Turn-On Time VIN = 3.6V, from ENB Falling 1.8 μs

STAT Pin Current Turn-Off Time VIN = 3.6V, from ENB Rising 0.8 μs

ENB Inputs Rising Threshold Voltage V

ENB Inputs Falling Threshold Voltage V

ENB Input Hysteresis V

ENB Inputs Pull-Down Current V

OVI Input Rising Threshold Voltage V

OVI Input Falling Threshold Voltage V

OVI-OVP Voltage Drop V

OVI Bias Current V

= 25°C. (Notes 2, 6)

A

= V

V

INA

V

INA

IN

V

IN

VIN = 3.6V, I

V

IN

= 0V, V

INB

= V

= 3.6V, V

INB

= 3.6V

= 3.6V

OUT

= 3.6V, IIN = 1A (Note 5) 140 200 mΩ

OUTA

ENBA

= 3.6V, V

= V

ENBB

OUTB

= 1V

= 5.5V

= –100mA to –500mA (Note 5) 100 140 mΩ

Ramp

OUT

l

l

l

–5 10 mV

l

3.5 6.5 μA

28 38 μA

18 24 mV

11 μs

Starting

2μs

Falling to 0mA

= 3.6V (Note 5) 1.8 A

INA OR B

V

= 3.6V, I

INA OR B

, V

OUT

Rising

ENB

Falling

ENB

= (V

ENBHYST

< VIN = 3.6V, V

OUT

Rising 5.9 6.2 V

OVI

Falling 5.4 5.6 V

OVI

= 8V, No Load at OVP 100 mV

OVI

= 8V 80 μA

OVI

= 1.8A (Note 5) 100 130 μA

OUT

l

–1 0 1 μA

< VIL, TJ < 135°C, I

CTL

– V

ENBIH

ENB

ENBIL

< V

IL

< I

OUT

)90mV

MAX

l

71115 μA

l

l

400 460 mV

l

234 μA

540 600 mV

Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.

Note 2: The LTC4413-1/LTC4413-2 are guaranteed to meet performance
specifi cations from 0°C to 85°C. Specifi cations over the –40°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.

Note 3: Quiescent current increases with diode current: refer to plot of
I

vs I

OUT

.

QF

Note 4: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions.
Overtemperature protection will become active at a junction temperature
greater than the maximum operating temperature. Continuous operation
above the specifi ed maximum operating junction temperature may impair
device reliability.

Note 5: Specifi cation is guaranteed by correlation to wafer-level
measurements.

Note 6: Unless otherwise specifi ed, current into a pin is positive and
current out of a pin is negative. All voltages referenced to GND.

441312fd

3

LTC4413-1/LTC4413-2

TYPICAL PERFORMANCE CHARACTERISTICS

IQF vs I

120

100

80

(μA)

60

QF

I

40

20

0

1 100 1000 10000

IQF vs V

90

80

70

60

50

(μA)

QF

I

40

30

20

10

0

2.5

2

(Log) IQF vs I

LOAD

10

LOAD (mA)

IN

IQF = 1A

IQF = 100mA

4

VIN (V)

4.5

5

3

3.5

120°C

80°C

40°C

0°C

–40°C

441312 G01

5.5

441312 G04

(Linear) IQF vs Temperature

120

100

(μA)

QF

I

80

60

40

20

0

LOAD

120°C

80°C

40°C

0°C

–40°C

0

1000 1500 2000

500

LOAD (mA)

2500 3000

441312 G02

120

100

(μA)

QF

I

1A

80

60

40

20

0

–40

0 40 80 120

TEMPERATURE (°C)

500mA

100mA

1mA

441312 G03

IOC vs Temperature UVLO Thresholds vs Temperature

3500

3000

2500

2000

(mA)

OC

I

1500

1000

500

6

0

–40

0 40 120

TEMPERATURE (°C)

80

441312 G05

2.20

2.15

2.10

2.05

2.00

1.95

UVLO THRESHOLDS (V)

1.90

1.85
–40

0 40 120

TEMPERATURE (°C)

RISING

FALLING

80

441312 G06

UVLO Hysteresis vs Temperature

250

200

150

100

UVLO HYSTERESIS (mV)

50

0

–40

–20 0

20 60 120

TEMPERATURE (°C)

4

ENB Thresholds vs Temperature ENB Hysteresis vs Temperature

600

500

400

300

200

ENBIH/ENBIL (mV)

100

0

40

80 100

441312 G07

–40

0 40 80 120

TEMPERATURE (°C)

ENBIH
ENBIL

441312 G08

120

100

80

60

40

ENB HYSETERSIS (mV)

20

0

–40

040

–20 20

TEMPERATURE (°C)

80

60

100

441312 G09

441312fd

120

TYPICAL PERFORMANCE CHARACTERISTICS

0

R

FWD

80

78

76

74

72

70

500mA (mΩ)

68

FWD

R

66

64

62

60

2

2.5 3.5

V

FWD

250

200

150

(mV)

FWD

V

100

50

vs VIN and I

3

vs I

120°C
80°C
40°C
0°C
–40°C

LOAD

(Log)

4

VIN (V)

LOAD

4.5

= 500mA

5.5

5

441312 G10

V

and R

FWD

500

400

300

(mΩ)

FWD

R

200

100

0

6

0

120

100

(mΩ)

FWD

R

120°C
80°C
40°C
0°C
–40°C

500

R

FWD

80

60

40

20

vs I

FWD

1000 1500 2000

LOAD

LOAD (mA)

vs Temperature

100mA

1A

(Linear)

V

FWD

R

FWD

2500 3000

441312 G11

500mA

LTC4413-1/LTC4413-2

R

250

200

150

100

50

0

V

FWD

(mV)

600

500

400

(mΩ)

300

FWD

R

200

100

0

1

0.01

(μA)

LEAK

I

0.001

0.0001

FWD

1

0.1

and V

R

FWD

I

LEAK

V

REVERSE

vs I

FWD

10 100 1000 10000

LOAD (mA)

LOAD

120°C
80°C
40°C
0°C
–40°C

V

(Log)

FWD

441312 G12

vs Temperature at

= 5.5V

5.5V

3.6V

300

250

200

150

100

50

0

V

FWD

(mV)

0

1 100 1000 10000

100

10

1

0.1

(μA)

0.01

LEAK

I

0.001

0.0001

0.00001
0

I

LEAK

10

LOAD (mA)

vs V

REVERSE

120°C
80°C
40°C
0°C
–40°C

241356

V

(V)

REVERSE

0

–40

441312 G13

0 40 80 120

TEMPERATURE (°C)

441312 G14

Response to 800mA Load Step
in <16μs

CH1 = IN 100mV/DIV

CH2 OUT

100mV/DIV

CH4 I

OUT

200mV/DIV

4μs/DIV

441312 G16

441312 G17

0.00001
–40 40 80

0–20 60 10020

TEMPERATURE (°C)

ENB Turn-On, 30μs to Turn On
with 180mA Load

CH1 IN 1V/DIV

CH3 ENB

1V/DIV

CH4 I

OUT

200mV/DIV

10μs/DIV

12

441312 G15

CH2 OUT
1V/DIV

441312 G18

441312fd

5

LTC4413-1/LTC4413-2

0

TYPICAL PERFORMANCE CHARACTERISTICS

ENB Turn-Off, 2μs to Disconnect
IN from 180mA Load

CH2 OUT

1V/DIV

CH3 ENB

1V/DIV

4μs/DIV

CH1 IN 1V/DIV

CH4 I

IN

100mV/DIV

441312 G19

Effi ciency vs Load Current Power Loss vs Load Current

100

99

98

97

96

95

94

EFFICIENCY (%)

93

92

91

90

120°C
80°C
40°C
0°C
–40°C

1 100 1000 10000

10

LOAD (mA)

441312 G20

1000

100

10

POWER LOSS (mW)

1

0

120°C
80°C
40°C
0°C
–40°C

1

100 10 1000 1000

LOAD (mA)

441312 G21

Overvoltage Thresholds
vs Temperature (LTC4413-2 Only)

6.4

6.2

6.0

5.8

5.6

OVPIH/OVPIL (V)

5.4

5.2

5.0
–40

OVP RISING

OVP FALLING

0 40 120

TEMPERATURE (°C)

OVI-OVP Voltage Drop
vs OVI Voltage (LTC4413-2 Only)

6

TA = 25°C

5

4

3

OVP (V)

2

1

0

0

24

812

610

OVI (V)

Overvoltage Hysteresis
vs Temperature (LTC4413-2 Only)

400

350

300

250

200

150

OVP HYSTERESIS (mV)

100

50

0

80

441312 G22

–40

0

40

TEMPERATURE (°C)

120

80

441312 G23

IQ OVI vs Temperature
(LTC4413-2 Only)

180

441312 G25

160

140

120

100

OVI (μA)

80

Q

I

60

40

20

0

–40

IQ OVI = 13V

IQ OVI = 6.5V

0

40

TEMPERATURE (°C)

80

120

441312 G26

OVI Current vs Voltage
(LTC4413-2 Only)

140

TA = 25°C

120

100

80

(μA)

OVI

I

60

40

20

0

0

24

OVI-OVP vs Temperature
(LTC4413-2 Only)

160

140

120

100

80

OVI-OVP (mV)

60

40

20

0

–40

–20

0

V

OHOVP

20

TEMPERATURE (°C)

812

610

V

(V)

OVI

V

OHOVP

= 6.5V

40

60

= 13V

441312 G24

80

100

441312 G27

120

6

441312fd