UNISONIC TECHNOLOGIES CO., LTD

UC3500

CMOS IC

www.unisonic.com.tw

1 of 11

Copyright © 2011 Unisonic Technologies Co., Ltd

QW-R502-072,E

HIGH EFFICIENCY VFM

CONTROLLED STEP-UP

DC/DC CONVERTER

DESCRIPTION

The UTC UC3500 Step-up DC/DC converters are optimized

for applications that prioritize high efficiency and high frequency.

The efficiency is greatly improved by utilizing an internal VFM

controlled scheme that switches with fixed frequency and is

adjustable up to more than 150 KHz depending on the load.

The UTC UC3500 requires only three external components

to realize the conversion from the battery voltage to the selected

output voltage in the range of 2.5V ~ 5.5V.

The start-up voltage of UTC UC3500 is guaranteed at 0.8V

and the device is operating down to 0.5V. The Output current is

guaranteed up to 150mA, while quiescent current is only 18μA.

FEATURES

* 0.8V start-up voltage

* 0.5V hold-on voltage

* Output current up to 150mA

* Low supply current of 18μA

* Wide output voltage range of 2.5V~5.5V

* Output voltage accuracy ±2%

* High efficiency up to 88%

* Low profile and minimum external components

ORDERING INFORMATION

Ordering Number

Package

Packing

Lead Free

Halogen Free

UC3500L-xx-AB3-R

UC3500G-xx-AB3-R

SOT-89

Tape Reel

UC3500L-xx-AE3-R

UC3500G-xx-AE3-R

SOT-23

Tape Reel

UC3500L-xx-AF5-R

UC3500G-xx-AF5-R

SOT-25

Tape Reel