DESCRIPTION

The UTC UD182013 is an 2A synchronous step- down DC-DC

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

UD182013 adopts the COT architecture to achieve fast transient

responses for high voltage step down applications. The UTC

UD182013 operates in pulse skip mode that maintains high

efficiency during light load operation. The UTC UD182013 features

cycle-by-cycle current limit protection and prevent the UTC

UD182013 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 UD182013 also includes

input under-voltage lockout, output under-voltage protection, and

over-temperature protection to provide safe and smooth operation in

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

*Input Over-Voltage Protection

*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