DESCRIPTION

The UTC UD182013T is a 2A synchronous step-down DC-DC

converter with an input voltage range of 4.5V to 18V. The UTC

UD182013T adopts the COT architecture to achieve fast transient

responses for high voltage step down applications. The UTC

UD182013T operates in pulse skip mode that maintains high

efficiency during light load operation. The UTC UD182013T features

cycle-by-cycle over current limit protection and prevents the UTC

UD182013T from the catastrophic damage in output short circuit,

over current or inductor saturation. A build-in soft-start block

prevents inrush current during start up. The UTC UD182013T also

includes input under-voltage lockout, output under-voltage

protection, over-temperature protection, providing safe and smooth

operation under all working conditions.

FEATURES

* 4.5V to 18V Input Voltage Range

* 2A Available Load Current

* 580kHz Constant Switching Frequency

* Low RDSON for Internal Switches:

High-side:130mΩ

Low-side:70mΩ

* Soft Start Time: 1.5ms

* Advanced Constant On-Time Control

*Fast Transient Responses

*Input Under-Voltage Lockout

*Output Under-Voltage Protection

*Cycle-by-cycle Over Current Limit

*Short Circuit with Hiccup Mode

*Over-Temperature Protection

*Optimized for Low-ESR Ceramic Output Capacitors