UNISONIC TECHNOLOGIES CO., LTD

US2351

Preliminary

CMOS IC

www.unisonic.com.tw

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Copyright © 2015 Unisonic Technologies Co., Ltd

QW-R129-011.a

HIGH PRECISION LOW COST

MCM POWER SWITCH

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DESCRIPTION

The UTC US2351 is a high performance, high precision and low

cost PWM Power switch for non-isolated buck application. It

combines a dedicated current mode PWM controller and error

amplifier for low component count. UTC US2351 use UTC

proprietary frequency shuffling technique for EMI performance. And

oscillator with frequency-reduction control is implemented.

The UTC US2351 has soft start control and protection function,

such as Cycle-by-Cycle current limiting, Over Loading Protection,

OVP, and UVLO.

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FEATURES

* Power on soft-start

* Load compensation

* Built-in error amplifier

* Oscillator of fixed frequency with frequency-reduction control

* Frequency shuffling for EMI improvement

* Built-in Leading Edge Blanking (LEB)

* Cycle-by-Cycle current limiting

* Over loading protection

* Output short-circuit protection

SOP-8

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ORDERING INFORMATION

Ordering Number

Package

Packing

US2351G-S08-R

SOP-8

Tape Reel

US2351G-S08-R

(1)Packing Type

(2)Package Type

(1) R: Tape Reel

(2) S08: SOP-8

(3) G: Halogen Free and Lead Free

(3)Green Package

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MARKING