UNI SONI C TECHNOLOGI ES CO., LTD

UC3552

CMOS IC

www.unisonic.com.tw

1 of 7

Copyright © 2016 Unisonic Technologies Co., Ltd

QW-R502-134.C

PWM DC-DC CON V ERT ER

WI T H I N T ERN AL SWI T CH AN D

SOFT -ST ART



DESCRI PT I ON

The UTC UC3552 is a step-up PWM DC-DC converter with a

internal switch which is 1.6A, 0.23

Ω. UTC UC3552 offers users

flexibility in determining loop dynamics and adjusting operating

frequency cause it’s equipped with an external compensation

pin ,and it also allows the use of small, low equivalent resistance

(ESR) ceramic output capacitors. UTC UC3552 is capable of

converting a standard input of 3.3V to multiple outputs of 8V,

− 8V ,

and 23V. Otherwise, filtering and loop performance are enhanced

and facilitated by a high switching frequency of either 640 kHz

or1.3MHz.

As a power-smart design in shutdown mode a soft-start with an

external capacitor that sets the input current ramp rate, reduces the

current consumption to 0.1

μA. A mere 2.6V input yields an

impressive output voltage to 12V when operating.



FEAT U RES

* 1.6A, 0.23

Ω, internal switch

* High efficiency: 90%

* Adjustable frequency: 640kHz or 1.3MHz

* Wide input range: +2.6V ~ +5.5V

* Low shutdown current: 0.1

μA

* Programmable soft-start



ORDERI N G I N FORM AT I ON

Ordering Number

Package

Packing

UC3552G-S08-R

SOP-8

Tape Reel

UC3552G-SM1-R

MSOP-8

Tape Reel