DESCRIPTION

The UTC UD05307 is a constant frequency, current mode,

step-down converter. It can achieve up to 3A continuous output

current from 2.5V to 5.5V input voltage with excellent load and line

regulation. The output voltage can be regulated as low as 0.6V.

The device also can run at 100% duty cycle for low dropout

operation.

The device features cycle-by-cycle current limit protection which

prevents the device from the catastrophic damage in output short

circuit, over current or inductor saturation. An internal soft-start

function prevents inrush current during start-up.

The device also includes Input Under-voltage lockout, Input

over-voltage protection, Output under-voltage protection, Output

Over-voltage protection and Over-temperature protection to provide

safe and smooth operation in all operating conditions.

FEATURES

* 2.5V to 5.5V Input Voltage Range

* 3A Available Load Current

* 1MHz Constant Switching Frequency

* Low RDSON for Internal Switches:

High-side: 65mΩ

Low-side: 45mΩ

* 65μA Typical Quiescent Current

* Soft Start Time: 1ms

* Peak Current Mode Control

* 100% Duty Cycle in Dropout

* Input Under-Voltage Lockout

* Input Over-Voltage Protection

* Output Under-Voltage Protection

* Output Over-Voltage Protection

* Power Good Output Function

* Output Auto Discharge Function

* Cycle-by-cycle Over Current Limit

* Short Circuit with Hiccup Mode

* Over-Temperature Protection