Rev1.0

Preliminary and all contents are subject to change without prior notice

© Seaward Electronics Inc., 2014. • www.seawardinc.com.cn • Page 2

SE2490

2.8A，Wide-Input Sensorless CC/CV Step-Down

DC/DC Converter

Pin Configuration

Pin Description

Pin

Pin Function Description

Pin

Pin Function Description

BS

Bootstrap Pin. This provides power to

the internal high-side MOSFET gate

driver. Connect a 0.1uF capacitor from

BS pin to LX pin.

FB

Output voltage feedback control

LX

Power Switching Output to

External Inductor.

COMP

Error Amplifier Output. This pin is used

to compensate the converter.

SENSE1

Current Sense input1

VIN

Power Supply Input. Bypass this pin with

a 0.1uF ceramic capacitor to GND,

placed as close to the IC as possible.

SENSE2

Current Sense input2

GND

GND pin.

Ordering Information

Part Number

Marking Information

Package

Remarks

SE2490-LF

SE2490

YYWW-LF

PSOP-8

YYWW means

Production batch

XX=LF: Lead Free.