UNISONIC TECHNOLOGIES CO., LTD

UC3656

CMOS IC

www.unisonic.com.tw

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Copyright © 2017 Unisonic Technologies Co., Ltd

QW-R502-469.K

1.6MHz, 1A SYNCHRONOUS

BUCK CONVERTER

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DESCRIPTION

The UTC UC3656 is a synchronous buck converter for a DC/DC

converter optimized for high-performance microprocessor

applications.

It is configured with current mode for excellent line and load

transient response. At 1.6MHz operation frequency, the use of

small surface mount inductor and capacitor is enabled. The built-in

synchronous switch saves the use of an external Schottky diode

and increases efficiency.

The UTC UC3656 is a low-noise synchronous step-down

DC/DC converter that is ideally suited for systems requiring

supplies from a 1-cell Li-ion battery or from a 3-cell to 4-cell NiCd,

NiMH, or alkaline battery.

The UTC UC3656 is generally applied in power supply for

portable devices and USB-based power system.

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FEATURES

* High Efficiency

* Input Voltage Range: 2.5V ~ 5.5V

* Schottky Diode is Saved

* Output Current: 1000mA (@5V Input 3.3V Output)

* 1.6MHz Oscillation Frequency

* Internal ON/OFF

* 100% Duty Cycle Allows Low Dropout Operation

* Stand-by Current: 1μA (Max.)

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ORDERING INFORMATION

Ordering Number

Lead Free

Halogen Free

Package

Packing

UC3656L-AF5-R

UC3656G-AF5-R

SOT-25

Tape Reel

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MARKING