LTC3557EUF View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC3557EUF

USB Power Manager with Li-Ion Charger and Three Step-Down Regulators

Linear Technology 

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BLOCK DIAGRAM

LTC3557/LTC3557-1

VBUS

24

CLPROG

27

3

WALL

WALL

DETECT

25

ACPR

26

VC

VC

CONTROL

INPUT

CURRENT

LIMIT

CC/CV

CHARGER

IDEAL

DIODE

+–

+

–

15mV

VNTC

18

NTC

19

BATTERY

TEMP

MONITOR

CHRG

28

CHARGE

STATUS

ILIM0

1

ILIM1

2

EN1

9

EN2

10

EN3

11

MODE

8

RST2

14

ILIM

LOGIC

EN

LOGIC

3.3V

LDO

600mA, 2.25MHz

BUCK REGULATOR

OSC

REF

EN

MODE

400mA, 2.25MHz

BUCK REGULATOR

OSC

EN

MODE

400mA, 2.25MHz

BUCK REGULATOR

OSC

EN

MODE

GND

29

VOUT

23

GATE

21

BAT

22

PROG

20

LDO3V3

4

VIN1

6

SW1

5

FB1

7

VIN2

16

SW2

15

FB2

13

SW3

17

FB3

12

35571 BD

35571fc

11

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