LTC3522EUD 查看數據表（PDF） - Linear Technology

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LTC3522EUD

Synchronous 400mA Buck-Boost and 200mA Buck Converters

Linear Technology 

LTC3522

BLOCK DIAGRAM

8

PVIN1*

11 10

SW1A SW1B

A

BC

PGND1 PGND2

12

VOUT1

+

D

0.85A –

+

0.250A –

+

0A –

IZERO

FILTER

0.9V +

–

PGOOD1

6

VOUT1

GATE

DRIVES

BUCK-BOOST

PWM

LOGIC

15 PVIN2*

INTERNAL

VCC

OSCILLATOR

UVLO

1.00V

FB1

5

SOFT-START

RAMP

SHDN1

7

PWM

2

SW2

14

GATE

DRIVES

BUCK

PWM

LOGIC

PGND1

0A

+

ZERO CROSSING

–

+

ILIMIT

0.4A –

+

SLOPE

COMPENSATION

SHDN2

16

1.00V

0.594V

0.9V

0.548V

BANDGAP

REFERENCE

AND OT

SHUTDOWN

FB2

–gm

+

1

+

0.594V +

–

SOFT-START

RAMP

GND PGND1

3

13

*PVIN1 AND PVIN2 MUST BE CONNECTED TOGETHER IN THE APPLICATION.

PGND2

9

0.548V +

–

PGOOD2

4

3522 BD

3522fa

8

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