LM3754_15 datasheet(2/47 Pages) TI

Nome de Peças	LM3754

Descrição Electrónicos	Scalable 2-Phase Synchronous Buck Controller with Integrated FET Drivers and Linear Regulator Controller

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Fabricante Electrônico	TI [Texas Instruments]

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32

DAP (should be tied to

SGND and PGND on board)

BOOT2

PH

CS1

CSM

ILIM

CS2

EN

IAVE

BOOT1

PGOOD

SYNCOUT

SYNC

NBASE

VIN

VCC

LM3754

WQFN-32

5 x 5 x 0.8 mm body size

0.5 mm pitch

FAULT

LM3754

SNVS789B – JANUARY 2012 – REVISED APRIL 2013

www.ti.com

Connection Diagram

Figure 1. Top View

32-Lead WQFN

Pin Descriptions

Pin Number

Pin Name

Description

1

HG2

Gate drive of the high-side N-channel MOSFET for Phase 2.

2

SW2

Switching node of the power stage of Phase 2.

3

LG2

Gate drive of the low-side N-channel MOSFETs for Phase 2.

4

VDD

Power supply for gate drivers. Decouple VDD to PGND with a ceramic capacitor. VDD can either be

supplied by an external 5V ±10% bus, or by the internal regulator, which uses an external NPN pass

device. If using the internal regulator, connect VDD to the emitter of the NPN pass device.

5

PGND

Power Ground. Tie PGND and SGND together on the board through the DAP.

6

LG1

Gate drive of the low-side N-channel MOSFETs for Phase 1.

7

SW1

Switching node of the power stage of Phase 1.

8

HG1

Gate drive of the high-side N-channel MOSFET for Phase 1.

9

BOOT1

Bootstrap of Phase 1 for the high-side gate drive power supply.

10

PGOOD

Power Good open-drain output. Active HIGH.

11

SYNCOUT

Synchronization Output. For multi-controller systems this pin should be connected to the SYNC pin of

the next controller in daisy-chain configuration

2

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