Datasheet > UD05122

UD05122

更新时间： 2024-11-05 14:55:07

品牌	Logo	应用领域
友顺 - UTC		/
页数	文件大小	规格书
5页	189K
描述
1.4MHz, 1.2A, VFB=0.6V synchronous step-down conve...

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UD05122 数据手册

UNISONIC TECHNOLOGIES CO., LTD

UD05122

Preliminary

CMOS IC

1.4MHz, 1.2A, V_FB=0.6V

SYNCHRONOUS STEP-DOWN

CONVERTER



DESCRIPTION

UTC UD05122 is a 1.4MHz constant frequency current mode

PWM step-down converter. It is ideal for portable equipment

requiring very high current up to 1.2A from single-cell Lithium-ion

batteries while still achieving over 90% efficiency during peak load

conditions. The 2.5V to 5.5V input voltage range makes UTC

UD05122 ideally suited for single Li-Ion, two to four AA

battery-powered applications. 100% duty cycle provides low

dropout operation, extending battery life in portable systems. Pulse

skipping mode operation provides very low output ripple voltage for

noise sensitive applications. Switching frequency is internally set at

1.4MHz, allowing the use of small surface mount inductors and

capacitors. The internal synchronous switch increases efficiency

and decreases need of an external Schottky diode. Low output

voltages are easily supported with the 0.6V feedback reference

voltage.



FEATURES

* Input Voltage Range :2.5V~5.5V

* Output Voltage: from 0.6V to V_IN

* High Efficiency: Up to 92%

* Constant Frequency Operation:1.4MHz

* Output Current:1.2A

* Quiescent Current: 200uA (input < 4.2V)

* No Schottky Diode Required

* 100% Duty Cycle in Dropout

* 0.6V Reference Allows Low Output Voltages

* Current Mode Operation for Excellent Line and Load Transient

Response

* Current limit, Enable function

* Short Circuit Protect (SCP)

* ≤1µA Shutdown Current

www.unisonic.com.tw

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