DESCRIPTION

The UTC UD05124 is a high efficiency, high frequency

synchronous DC-DC step-down converter. The 100 duty cycle

feature provides low dropout operation, extending battery life in

portable systems.

The internal synchronous switch increases efficiency and

eliminates the need for external schottky diode. At shutdown mode,

the input supply current is less than 1μA.

The UTC UD05124 fault protection includes over current

protection, short circuit protection, UVLO and thermal shutdown. The

Internal soft-start function prevents inrush current at turn-on.

FEATURES

* 2.5V ~ 6V Input Voltage Range

* 0.6V Reference Voltage

* 1.2A Output Current

* Low RDS(ON) for Internal Switch: 340 / 210mΩ (Top/Bottom)

* 1.5MHz Switching Frequency

* Internal 1ms Soft-Start Time

* Internal Compensation Function

* 100 Dropout Operation

* Input Over Voltage Protection

* Over Current Protection

* Short Circuit Protection

* Over Temperature Protection with Auto Recovery