LTC3554-3 View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC3554-3

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

Linear Technology 

Block Diagram

LTC3554/LTC3554-1/

LTC3554-2/LTC3554-3

VBUS 20

HPWR 1

SUSP 19

INPUT

CURRENT

LIMIT

CC/CV

CHARGER

NTC 15

CHRG 14

BATTERY

TEMP

MONITOR

CHARGE

STATUS

EXTPWR UVLO

FSEL 2

2.25MHz/

1.125MHz

OSCILLATOR

÷

4096

STBY 10

PWR_ON1 9

PWR_ON2 8

PBSTAT 3

ON 5

PUSH BUTTON

INTERFACE

OSC

0.8V

EN

STBY

200mA STEP-DOWN DC/DC

OSC

0.8V

EN

STBY

200mA STEP-DOWN DC/DC

POWER GOOD

COMPARATORS

21

GND

18 VOUT

17 BAT

16 PROG

13 SW1

6 FB1

12 BVIN

11 SW2

7 FB2

4 PGOOD

3554 BD1

3554123ff

13

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