LTC3446(RevD) Просмотр технического описания (PDF) - Linear Technology

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LTC3446
(Rev.:RevD)

Monolithic Buck Regulator with Dual VLDO Regulators

Linear Technology 

LTC3446

BLOCK DIAGRAM

BUCKFB

12

3

ITH

ENBUCK

0.4V

0.8V

VOLTAGE

REFERENCE

ERROR

AMPLIFIER

+

ITH

PARK

ITH

LIMIT

–

BCLAMP

B

SOFT-START

PMOS CURRENT

COMPARATOR

–

+

+

VB

BURST

COMPARATOR

OSCILLATOR

SLOPE

COMPENSATION

2

VIN

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

GND

15

EXPOSED

PAD

LVIN

6

LVOUT1

5

LVFB1

10

LVOUT2

7

LVFB2

9

3446 BD

3446fd

9

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