DESCRIPTION

The UTC UD17301 is a fully integrated, highfrequency,

synchronous, rectified, step-down, switchmode converter with internal

power MOSFETs. The UD17301 offers a very compact solution that

achieves 3A of continuous output current with excellent load and line

regulation over a wide input range.

The UD17301 uses synchronous-mode operation for higher

efficiency over the output current-load range.

Constant-on-time (COT) control operation provides very fast

transient response, easy loop design, and very tight output regulation.

Full protection features include shortcircuit protection (SCP),

over-current protection (OCP), under-voltage protection (UVP), and

thermal shutdown.

FEATURES

* Wide 4.2V to 17V Operating Input Range

* 63mΩ / 36mΩ Low RDS(ON) Internal Power MOSFETs

* 200µA Low IQ

* High-Efficiency Synchronous Mode Operation

* Forced PWM Operation Mode

* Fast Load Transient Response

* 1.2MHz Switching Frequency

* Internal Soft Start (SS)

* Over-Current Protection (OCP) and Hiccup

* Thermal Shutdown

* Output Adjustable from 0.8V