SPX1117 Datasheet, PDF (1/15 Pages) Sipex Corporation – 800mA Low Dropout Regulator

®
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
V_IN
Date: 8/25/04
Current Limit
+
-
I_CL
+
AMP
- ^1.25V
V_OUT
Thermal Limit
+
–
I _TL
V_REF
ADJ/GND
I_ADJ ^~ 50µA
SPX1117 800mA Low Dropout Voltage Regulator
1
© Copyright 2004 Sipex Corporation