FEATURES
• Output Accuracy 2.5V, 3.3V, 5.0V, @ 400mA Output
• Very Low Quiescent Current
• Low Dropout Voltage
• Extremely Tight Load And Line Regulation
• Very Low Temperature Coefficient
• Current & Thermal Limiting
• Error Flag Warns Of Output Dropout
• Logic-Controlled Electronic Shutdown
• Output Programmable From 1.24V to 26V
SPX2920
400mA Low Drop Out Voltage Regulator
with Shutdown
(PRELIMINARY INFORMATION)
APPLICATIONS
• Battery Powered Systems
• Cordless Telephones
• Radio Control Systems
• Portable/Palm Top/Notebook Computers
• Portable Consumer Equipment
• Portable Instrumentation
• Automotive Electronics
• SMPS Post-Regulator
• Voltage Reference
PRODUCT DESCRIPTION
The SPX2920 is a low power voltage regulator. This device is an excellent choice for use in battery-powered applications such as
cordless telephones, radio control systems, and portable computers. The SPX2920 features very low quiescent current (140µA Typ.)
and very low dropout voltage. This includes a tight initial tolerance of 1% max and very low output temperature coefficient, making
the SPX2920 useful as a low-power voltage reference.
The error flag output feature is used as power-on reset for warning of a low output voltage, due to a falling voltage input of batteries.
Another feature is the logic-compatible shutdown input which enables the regulator to be switched on and off. The SPX2920 is
offered in 3-pin and 5-pin TO-220 package, SO-8 (same pin out as SPX2951), SOT-223, and surface mount TO-263 packages.
The regulator output voltage (of the 8-pin SO-8 and 5-pin TO-220 & TO-263) may be pin-strapped for a 2.5V, 3.3V and 5.0V or
programmed from 1.24V to 26V with an external pair of resistors..
PIN CONNECTIONS
TO-263-5 Package
Five Lead Package Pin Functions:
TO-220-5 Package
SPX2920
12 34 5
Top View
SPX2920U51
SPX2920T51
1) ERROR
2) VIN
3) GND
4) VOUT
5) SHUTDOWN
SPX2920U52
SPX2920T52
ADJ
SHUTDOWN
GND
VIN
VOUT
SPX2920
12 34 5
Front View
TO-263-3 Package TO-220-3 Package
SPX2920
1 23
SPX2920
1 23
VIN GND VOUT
Top View
VIN GND VOUT
Front View
SOT-223 (M3)Package
8-Pin Surface Mount
SPX2920
123
V GND V
IN
OUT
Top View
VOUT
SENSE
SHUTDOWN
GND
1
8
2
7
SPX2920
3
6
4
5
Top View
VIN
FEEDBACK
5V/ 3.3V TAP
ERROR
Rev. 10/30/00