LTC3633A-2 Datasheet, PDF(10/28 Page) Linear Technology – Dual Channel 3A, 20V Monolithic Synchronous Step-Down Regulator

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LTC3633A-2 Datasheet, PDF (10/28 Pages) Linear Technology – Dual Channel 3A, 20V Monolithic Synchronous Step-Down Regulator

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LTC3633A-2/LTC3633A-3

BLOCK DIAGRAM

OSC1

COMP

SELECT

140k

PVIN

0.6V (LTC3633A-2)

1.5V (LTC3633A-3)

ION

CONTROLLER

VON

AV = 1

RUN

1.22V

RUN

tON

VVON

IION

6V (LTC3633A-2)

12V (LTC3633A-3)

RUN

SWITCH

LOGIC

AND

ANTI-

SHOOT

THROUGH

INTVCC

ICMP

+â

IREV

â+

SENSEâ

SENSE+

CIN

PVIN

BOOST

PGND

CBOOST

COUT

ITH

CC1

PGOOD

0.648V

TRACK

+ 0.552V

FC BURST

MODE

SELECT

IDEAL DIODES

0.6V

REF

INTERNAL

SOFT-START

INTVCC

1.4Î¼A

TRACKSS

CSS

CHANNEL 1

OSC1

0.48V AT START-UP

0.10V AFTER START-UP

RRT

PHMODE

OSC

PLL-SYNC

PHASE

SELECT

OSC2

SVIN

CSVIN

MODE/SYNC

3.3V

INTVCC

REG

CVCC

SGND

CHANNEL 2 (SAME AS CHANNEL 1)

3633a23 BD

3633a23f

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