LTC3556_15 datasheet(2/36 Pages) LINER

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LTC3556

3556f

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

VBUS (Transient) t < 1ms, Duty Cycle < 1%.. –0.3V to 7V

VIN1, VIN2, VIN3, VBUS (Static), DVCC,

FB1, FB2, NTC, BAT, ENALL, SCL, SDA,

PGOODALL, CHRG....................................... –0.3V to 6V

SEQ....................–0.3V to Lesser of 6V or (VOUT + 0.3V)

FB3, VC3..............–0.3V to Lesser of 6V or (VIN3 + 0.3V)

ICLPROG ....................................................................3mA

IPGOODALL, ICHRG ....................................................50mA

IPROG........................................................................2mA

ILDO3V3...................................................................30mA

ISW1, ISW2 ............................................................600mA

ISW, IBAT, IVOUT.............................................................2A

ISWAB3, ISWCD3, IVOUT3.............................................2.5A

Operating Temperature Range (Note 2).... –40°C to 85°C

Junction Temperature (Note 3) ............................. 125°C

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

(Note 1)

TOP VIEW

UFD PACKAGE

28-LEAD (4mm

5mm) PLASTIC QFN

11 12 13

28 27 26 25 24

LDO3V3

CLPROG

NTC

SW1

VIN1

FB1

FB3

VC3

GATE

CHRG

PROG

SW2

VIN2

FB2

SDA

PGOODALL

TJMAX = 125°C, θJA = 37°C/W

EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB

ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C. VBUS = 5V, VIN1 = VIN2 = VIN3 = VOUT3 = 3.8V, BAT = 3.8V, DVCC = 3.3V,

RPROG = 1k, RCLPROG = 3.01k, unless otherwise noted.

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LTC3556EUFD#PBF

LTC3556EUFD#TRPBF

3556

28-Lead (4mm

× 5mm) Plastic QFN

–40°C to 85°C

Consult LTC Marketing for parts speciﬁed 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 speciﬁcations, go to: http://www.linear.com/tapeandreel/

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

PowerPath Switching Regulator

VBUS

Input Supply Voltage

4.35

5.5

IBUSLIM

Total Input Current

1x Mode, VOUT = BAT

5x Mode, VOUT = BAT

10x Mode, VOUT = BAT

Suspend Mode, VOUT = BAT

436

800

0.31

460

860

0.38

100

500

1000

0.50

IVBUSQ

VBUS Quiescent Current

1x Mode, IOUT = 0mA

5x Mode, IOUT = 0mA

10x Mode, IOUT = 0mA

Suspend Mode, IOUT = 0mA

0.044

hCLPROG (Note 4)

Ratio of Measured VBUS Current to

CLPROG Program Current

1x Mode

5x Mode

10x Mode

Suspend Mode

224

1133

2140

11.3

mA/mA

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