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SPX1117M3-1.5

800mA Low Dropout Voltage Regulator

Signal Processing Technologies 

®

SPX1117

800mA Low Dropout Voltage Regulator

FEATURES

■ Guaranteed 0.8A Output Current

■ Guaranteed 1A Peak Current

■ Three Terminal Adjustable or Fixed

1.5V, 1.8V, 2.5V, 2.85V, 3.0V,

3.3V and 5V

■ Low Quiescent Current

■ Low Dropout Voltage of 1.1V at 0.8A

■ 0.1% Line and 0.2% Load Regulation

■ Stable with 2.2uF Ceramic Capacitor

■ Overcurrent and Thermal Protection

■ Available Packages: SOT-223,TO-252,

TO-220, and TO-263

APPLICATIONS

■ Desktop PC's Servers

■ SCSI-II Active Terminator

■ Portable/ Palm Top / Notebook

Computers

■ Cordless Phones

■ Battery Chargers

■ Disk Drives

■ Portable Consumer Equipment

■ Portable Instrumentation

■ SMPS Post-Regulator

Now Available in Lead Free Packaging

DESCRIPTION

The SPX1117 is a low power positive-voltage regulator designed to satisfy moderate power

requirements with a cost effective, small footprint solution. This device is an excellent choice for

use in battery-powered applications and portable computers. The SPX1117 features very low

quiescent current and a low dropout voltage of 1.1V at a full load. As output current decreases,

quiescent current flows into the load, increasing efficiency. SPX1117 is available in adjustable

or fixed 1.5V, 1.8V, 2.5V,2.5V, 2.85V, 3.0V, 3.3V and 5V output voltages.

The SPX1117 is offered in several 3-pin surface mount packages: SOT-223, TO-252, TO-220

and TO-263. An output capacitor of 10µF provides unconditional stability while a smaller 2.2µF

capacitor is sufficient for most applications.

FUNCTIONAL DIAGRAM

VIN

Date: 8/25/04

Current Limit

+

-

ICL

+

AMP

- 1.25V

VOUT

Thermal Limit

+

–

I TL

VREF

ADJ/GND

IADJ ~ 50µA

SPX1117 800mA Low Dropout Voltage Regulator

1

© Copyright 2004 Sipex Corporation

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