UNISONIC TECHNOLOGIES CO., LTD

LXXLD50

CMOS IC

www.unisonic.com.tw

1 of 11

Copyright © 2011 Unisonic Technologies Co., Ltd

QW-R502-474.B

0.8V REFERENCE ULTRA LOW

DROPOUT LINEAR REGULATOR

DESCRIPTION

The UTC LXXLD50 is a 5A ultra low dropout linear regulator

providing designers with well supply voltage for applications of NB and

front-side-bus termination on motherboards.

A control voltage for the circuitry and a main supply voltage for

power conversion are needed as supply voltages to reduce power

dissipation and provide extremely low dropout.

The UTC LXXLD50 contains some function circuits. A Power-On-

Reset (POR) circuit monitors both supply voltages to prevent undesired

operations. A thermal shutdown and current limit circuits prevent this

device from being damaged due to thermal and current over-loads. A

POK indicates the output status with a pre-set time delay. It can control

other converter for power sequence. The UTC LXXLD50 can be

enabled by other power system. Pulling and holding the EN pin below 0.3V shuts off the output.

The UTC LXXLD50 is ideal for applications,such as front side bus VTT (1.2V/5A), note book PC applications,

and motherboard applications.

FEATURES

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Low ESR Output Capacitor

*

*

High Output Accuracy : ±1.5% Over Line, Load and Temperature

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Fast Transient Response

*

*

Protection function: Internal Soft-Start

Current-Limit Protection

Under-Voltage Protection

Thermal Shutdown with Hysteresis

Over-Voltage Protection

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Power-OK Output with a Delay Time

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Shutdown for Standby or Suspend Mode

*

Lead Free Available (RoHS Compliant)

ORDERING INFORMATION

Ordering Number

Lead Free

Halogen Free

Package

Packing

LXXLD50L-SH2-R

LXXLD50G-SH2-R

HSOP-8

Tape Reel

Note: xx: Output Voltage, refer to Marking Information.