SPX1117M33.3[共16页].pdf

® SPX1117
800mA Low Dropout Voltage Regulator
FEATURES APPLICATIONS
■ Guaranteed Output Current ■ Desktop PC's Servers
■ Guaranteed 1A Peak Current ■ SCSI-II Active Terminator
■ Three Terminal Adjustable or Fixed ■ Portable/ Palm Top / Notebook
, , , , , Computers
and 5V ■ Cordless Phones
■
Low Quiescent Current ■ Battery Chargers
■
Low Dropout Voltage of at ■ Disk Drives
■
% Line and % Load Regulation ■ Portable Consumer Equipment
■
Stable with Ceramic Capacitor ■ Portable Instrumentation
■
Overcurrent and Thermal Protection ■ SMPS Post-Regulator
■ Available Packages: SOT-223,TO-252,
Now Available in Lead Free Packaging
TO-220, and TO-263
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 at a full load. As output current decreases,
quiescent current flows into the load, increasing efficiency. SPX1117 is available in adjustable
or fixed , , ,, , , 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 µF
capacitor is sufficient for most applications.
FUNCTIONAL DIAGRAM