UC3206X

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

4 of 4

www.unisonic.com.tw

QW-R211-031.a

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OPERATIONAL DESCRIPTION

Soft Start

The UTC UC3206X provides 0.25ms (Typ.) high speed soft-start. Soft start time is defined as the time to reach

90% of the output nominal voltage when the EN pin is turned on.

UVLO Circuit

When the IN pin voltage becomes 1.4V or lower, the P-channel output driver transistor is forced OFF to prevent

false pulse output caused by unstable operation of the internal circuitry. When the IN pin voltage becomes 1.8V or

higher, switching operation takes place.

CL High Speed Discharge

The UTC UC3206X can quickly discharge the electric charge at the output capacitor (CL) when a low signal to the

EN pin which enables a whole IC circuit put into OFF state, is inputted via the N-channel transistor located between

the LX pin and the GND pin.

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TYPICAL APPLICATION CIRCUIT

UTC assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.