LTC3446 查看數據表（PDF） - Linear Technology

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LTC3446

Monolithic Buck Regulator with Dual VLDO Regulators

Linear Technology 

LTC3446

Block Diagram

3

ITH

2

VIN

BUCKFB

12

0.4V

0.8V

VOLTAGE

REFERENCE

ERROR

AMPLIFIER

+

–

+

VB

ITH

PARK

ITH

LIMIT

–

BCLAMP

B

PMOS CURRENT

COMPARATOR

+

BURST

COMPARATOR

OSCILLATOR

SLOPE

COMPENSATION

SW

14

PGOOD

4

POWER

GOOD

ENBUCK

13

MODESEL

1

ENLDO1

11

SOFT-START

ENLDO2

8

SOFT-START

LOGIC

NMOS

OVERCURRENT

COMPARATOR

REVERSE

CURRENT

COMPARATOR

VIN

+

VLDO1

–

6µA

VIN

+

VLDO2

–

6µA

8

GND

15

EXPOSED

PAD

LVIN

6

LVOUT1

5

LVFB1

10

LVOUT2

7

LVFB2

9

3446 BD

3446ff

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