DESCRIPTION

The UTC UD05158 is a high-frequency, synchronous, rectified,

step-down, switch-mode converter with internal power MOSFETs.

It offers a very compact solution to achieve a 1.5A continuous

output current over from 2.7V to 5.5V input supply range, with

excellent load and line regulation.

The output voltage is adjustable from 0.6V to the input voltage.

During shutdown, the input is disconnected from the output and the

shutdown current is less than 1uA. Other key features include

over-temperature and short circuit protection, and under-voltage

lockout to prevent deep battery discharge.

The UTC  UD05158 at 1.5A maximum output current while

consuming only 200μA of no-load quiescent current. Ultra-low

RDS(ON) integrated MOSFETs   and 100% duty cycle operation make

the UTC  UD05158  an ideal choice for high-output voltage,

high-current applications which require a low dropout threshold.

FEATURES

* Output Current : Up to 1.5A

* Output Voltage : 0.6V to VIN

* Input Voltage : 2.7V to 5.5V

* Low-RDS(ON) Internal Power MOSFETs.

* High-Efficiency Synchronous-Mode Operation, up to 95%

* 200uA (typ.) No Load Quiescent Current

* Shutdown Current < 1µA

* 100% Duty Cycle Operation

* Fixed 1.5MHz Switching Frequency.

* Current Mode Operation

* Internal Soft-Start.

* Current Limit Protection  

* Over-temperature Protection.

* Input Under Voltage Lockout (UVLO)