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

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

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LTC3633A/LTC3633A-1

BLOCK DIAGRAM

OSC1

COMP

SELECT

140k

VIN 0.6V (LTC3633A)

1.5V (LTC3633A-1)

ION

CONTROLLER

VON

RUN

1.22V

AV = 1

6V (LTC3633A)

12V (LTC3633A-1)

RUN

INTVCC

tON

VVON

IION

ICMP

+â

SWITCH

LOGIC

AND

ANTI-

SHOOT

THROUGH

IREV

â+

SENSEâ

SENSE+

CIN

VIN

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

RRT

PHMODE

OSC1

OSC

PHASE

SELECT

OSC2

OSC

PLL-SYNC

0.48V AT START-UP

0.10V AFTER START-UP

CHANNEL 2 (SAME AS CHANNEL 1)

VIN1

3.3V

REG

MODE/SYNC

INTVCC

2.5V

V2P5

REG

SGND

CVCC

3633a BD

3633a1f

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