UNISONIC TECHNOLOGIES CO., LTD

P1580

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

1 of 6

Copyright © 2010 Unisonic Technologies Co., Ltd

QW-R103-049.A

380KHz, 2.5A STEP-DOWN

SWITCHING REGULATOR

DESCRIPTION

The UTC P1580 is a current mode, PWM controller with 380kHz

fixed frequency. It achieves 2.5A continuous output current over a

wide input supply range with excellent load and line regulation. By

using an external compensation pin, this device offers user flexibility

in determining loop dynamic.

The UTC P1580 integrates control, monitor and protection

functions to provide a low cost and perfect power solution. The

device provides 3.5 to 28V wide range operating input and

high-efficiency up to 90%.

An Under- Voltage-Lock-Output (UVLO) circuit monitors the

supply voltage to prevent from wrong logic control. An internal

1.222V reference voltage provides low output voltage down to 1.22V

for further applications. The over-current protection of controller

monitors the output current by using the voltage drop across a

current sensing resistor. Additional under voltage protection monitors

the voltage on FB pin for short-circuits protection.

The UTC P1580 provides fast transient response and requires

very few external devices for operation.

FEATURES

* 2.5A Output Current

* 380kHz Frequency of Operation

* 3.5V to 28V Input Voltage Range

* 5μA Shutdown Supply Current

* Output Adjustable From 1.22 to 21

* Frequency Feedback at Short Circuit

* Thermal Shutdown

* Under Voltage Lock Output

* Current Mode With Low ESR Output Ceramic Capacitors

* Up to 90% Efficiency

* Frequency Synchronization Input

ORDERING INFORMATION

Ordering Number

Package

Packing

P1580G-SH2-R

HSOP-8

Tape Reel