DESCRIPTION

The UTC UD48101A is an easy to use synchronous stepdown

Buck, which integrated with highside and low-side power MOSFETs.

The UTC UD48101A can provide up to 1A of output current

efficiently with current-mode control for fast loop response.

Wide 4.5V to 48V input range accommodates a variety of power

meter step-down applications. UTC UD48101A uses high duty cycle

and low dropout mode for low power meter input voltage conditions.

The UTC UD48101A achieves high power conversion efficiency

over a wide load range by scaling down the switching frequency

under light-load conditions to reduce switching and gate driving

losses.

The UTC UD48101A has built-in full protection features,

cycle-by-cycle current limit, hiccup mode short-circuit protection, and

thermal shutdown in case of excessive power dissipation.

FEATURES

* 4.5V to 48V Input Voltage Range

* 50V Absolute Maximum Rating

* 1A Continuous Output Current

* 100ns Minimum Switching-On Time

* 2%~98% Large Range Duty Cycle

* Stable with Ceramic/Electrolytic Output Capacitors

* 650KHz Switching Frequency

* Light Load Pulse Frequency Modulation

* 420mΩ/220mΩ Internal Power MOSFETs

* Support Startup with Pre-Biased Output

* Short Circuit Protection with Hiccup Mode

* ±1.5% Tolerance Voltage Reference at 25°C

* Output Voltage Adjustable from 0.8V

* Precision Enable

* Over Temperature Protection

* Green & Pb Free