VCON

FB

NC

SGND

BPEN

EN

VIN

SW

PGND

VCON

FB

NC

SGND

BPEN

EN

VIN

SW

PGND

LM3242

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SNOSB48E – OCTOBER 2011 – REVISED AUGUST 2015

5 Pin Configuration and Functions

YFQ Package

9-Pin DSBGA

Top View (left); Bottom View (right)

Pin Functions

PIN

TYPE

DESCRIPTION

NUMBER

NAME

A1

VCON

A/I

A2

SGND

G

Signal ground for analog and control circuitry.

A3

PGND

G

Power ground for the power MOSFETs and gate drive circuitry

Enable Input. Set this digital input high for normal operation. For shutdown, set low. Do not

B1

EN

D/I

leave EN pin floating.

B2

NC

—

Do not connect to PGND directly — Internally connected to SGND.

Switching node connection to the internal PFET switch and NFET synchronous rectifier.

B3

SW

P/O

Connect to an inductor with a saturation current rating that exceeds the maximum Switch Peak

Current Limit specification of the LM3242.

Bypass Enable input. Set this digital input high to force bypass operation. For normal operation

C1

BPEN

D/I

with automatic bypass, set low or connect to ground. Do not leave this pin floating.

Feedback analog input and bypass FET output. Connect to the output at the output filter

C2

FB

A

capacitor.

C3

VIN

P/I

Voltage supply input for SMPS converter.

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