UNISONIC TECHNOLOGIES CO., LTD

UU28121

CMOS IC

www.unisonic.com.tw

1 of 6

Copyright © 2016 Unisonic Technologies Co., Ltd

QW-R135-001.C

1.2MHz, HIGH VOLTAGE,

BOOST CONVERTER

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DESCRIPTION

The UTC UU28121 is a current mode step up converter

intended for small, low power applications.

The converter input voltage ranging from 2.5V to 5.5V. The

Output voltage can be set up to 28V. The frequency is 1.2MHz

allows the use of small external inductors and capacitors and

provides fast transient response. Internal soft start results in small

inrush current and extends battery life. Internal power MOSFET

with very low RDS (ON) provides high efficiency. The UTC

UU28121

automatically transits from PWM to PFM during light load

condition further increasing efficiency. The converter also provides

protection functions such as under-voltage lockout, current limit

and thermal shutdown.



FEATURES

* 2.5V~5.5V operating input voltage range

* 1.2MHz Fixed Switching Frequency

* Adjustable output voltage range up to 28V

* Internal 1.2A switching current limit

* Internal Soft-start Function

* Current limit and Thermal shutdown protection

* Under voltage Lockout

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ORDERING INFORMATION

Ordering Number

Package

Packing

UU28121G-AF5-R

SOT-25

Tape Reel

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MARKING