MARK and ORDERING INFORMATION

Mark Explanation

aa: Type

b: Year

c: Week

PINOUT DESCRIPTION

PIN #

NAME

DESCRIPTION

1

BST

Bootstrap pin. Connect a 10nF capacitor from this pin to SW

2

GND

Ground

3

FB

Feedback Input. Connect an external resistor divider from the output to FB and GND to set VOUT

4

EN

Enable pin for the IC. Drive this pin high to enable the part, low to disable.

5

IN

Supply Voltage. Bypass with a 10μF ceramic capacitor to GND

6

SW

Inductor Connection. Connect an inductor Between SW and the regulator output.

BLOCK DIAGRAM

REG

&REF

PWM

Logic

DRIVER

FB

+

Slope Comp

OSC

Σ

IN

BST

SW

GND

UVLO &

Thermal

shutdown

Current

Sense

EA

+

-

-

EN

COMP

network

LESHAN RADIO COMPANY, LTD.

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