LTC3456 Просмотр технического описания (PDF) - Linear Technology

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LTC3456

2-Cell, Multi-Output DC/DC Converter with USB Power Manager

Linear Technology 

LTC3456

BLOCK DIAGRA

USB

USB

10

4.7µF

1Ω

4V

+–

R

–

+VOS

EN

AC

ADAPTER

VEXT

AO

USB

CONTROLLER

11.3k

4.32k

D1

1k

D2

SUSPEND

18

USBHP

12

WALLFB +

7

–

1.25V

EXT_PWR

8

10µF

VEXT

9

AO

2

USB

CONTROL

LOGIC

USB_RDY

0.8V

VBATT

80.6k

100k

4.7µF

AIN

1

VBATT

4

L1

VCORE

10µH

SW1

5

DRV

220pF 100k

FB1

24

10µF

80.6k

–

0.8V +

USB

VEXT

VINT

VBATT

PowerPath

CONTROLLER

VMAX

11

1µF

+

4V –

VEXT_RDY

PWRKEY

19

PBSTAT

20

START-UP

LOGIC

TURN-ON

SWITCHERS

262ms

TIMER

PWRON

21

MODE

22

RESET

23

HSO

17

HSO

R–

1µF

VEXT

+VOS

PSWITCH

200k 625k

–

0.8V +

DRV

VMAIN

16

VINT

15

SW2_BST

14

1µF

L2

4.7µH

VMAIN

VBATT

4.7µF

SW2_BK

13

L3

10µH

AGND 3

PGND 6

3456 F01

VINT

22µF

Figure 1. LTC3456 Block Diagram

3456fa

11

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