Top View

Bottom View

A1

A2

A3

D1

D2

B1

B2

B3

C1

C2

C3

D3

A1

A2

A3

D1

D2

D3

B1

B2

B3

C1

C2

C3

LM3269

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SNVS793D – NOVEMBER 2011 – REVISED MAY 2015

5 Pin Configuration and Functions

YZR Package

12-Pin DSBGA

Top View

Pin Functions

PIN

DESCRIPTION

NUMBER

NAME

A1

NC

—

Non Connection. Leave this pin floating; do not connect to PVIN or PGND.

A2

NC

—

Non Connection. Leave this pin floating, do not connect to PVIN or PGND.

A3

PVIN

P/I

Power MOSFET input and power current input pin. Optional low-pass filtering may help buck and

buck-boost modes for radiated EMI and noise reduction.

B1

VCON

A/I

Voltage Control analog input. VCON controls the output voltage in PWM and PFM modes.

B2

EN

D/I

Enable pin. Pulling this pin higher than 1.2 V enables part to function.

B3

PVIN

P/I

Power MOSFET input and power current input pin. Optional low-pass filtering may help buck and

buck-boost modes for radiated EMI and noise reduction.

C1

FB

A

Feedback input to inverting input of error amplifier. Connect output voltage directly to this node at

load point.

C2

SGND

G

Signal Ground for analog circuits and control circuitry.

C3

SW1

P/O

Switch pin for Internal Power Switches. Connect inductor between SW1 and SW2.

D1

VOUT

O

Regulated output voltage of the LM3269. Connect this to a 4.7-µF ceramic output filter capacitor

to GND.

D2

SW2

P/O

Switch pin for Internal Power Switches. Connect inductor between SW1 and SW2.

D3

PGND

G

Power Ground for Power MOSFETs and gate drive circuitry.

(1)

A: Analog Pin, D: Digital Pin, G: Ground Pin, P: Power Pin, I: Input Pin, O: Output Pin.

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