UNISONIC TECHNOLOGIES CO., LTD

U8021

Preliminary

CMOS IC

www.unisonic.com.tw

1 of 6

Copyright © 2013 Unisonic Technologies Co., Ltd

QW-R502-A13.a

VOLTAGE MODE PWM

CONTROLLER WITH LINEAR

POWER REGULATOR



DESCRIPTION

The UTC U8021 provides the control and protection features

necessary for a synchronous buck converter and a linear

regulator in high performance graphic card applications.

The UTC U8021 is designed to directly drive the high and low

MOSFETs of the buck converter. It allows the converter to

operate with 4V~25V power rail and as low as 0.5V output. The

UTC U8021 is capable to drive a N-type MOSFET in a linear

regulator with as low as 0.5V output.

The UTC U8021 features soft-start, UVLO, and OCP. The

UTC U8021 monitors the output current by using the Rdson of the

low MOSFET in the buck converter that eliminates the need for a

current sensing resistor.



FEATURES

* 4V~25V power rails

* Internal LDO

* 1.5A gate drive current

* Adaptive non-overlapping gate drives provide shoot-through

protection for MOSFETs

* Programmable output voltages

* Internal soft start

* Under voltage lockout

* Short circuit protection



ORDERING INFORMATION

Ordering Number

Package

Packing

Lead Free

Halogen Free

U8021L-S14-T

U8021G-S14-T

SOP-14

Tube

U8021L-S14-R

U8021G-S14-R

SOP-14

Tape Reel