SPX3940 Datasheet, PDF (1/11 Pages) Sipex Corporation – 1A Low Dropout Voltage Regulator Fixed Output, Fast Response

®
SPX3940
1A Low Dropout Voltage Regulator
Fixed Output, Fast Response
FEATURES
■ 1% Output Accuracy SPX3940A
■ Guaranteed 1.5A Peak Current
■ Low Quiescent Current
■ Low Dropout Voltage of 280mV at 1A
■ Extremely Tight Load and Line Regulation
■ Extremely Fast Transient Response
■ Reverse-battery Protection
■ Internal Thermal Protection
■ Internal Short Circuit Current Limit
■ Replacement for LM3940
■ Standard SOT-223, TO-220
and TO-263 packages
APPLICATIONS
■ Powering VGA & Sound Card
■ Automotive Electronics
■ LCD Monitors
■ Cordless Telephones
■ Power PC^TM Supplies
SPX3940
3 Pin TO-263
1 23
V_{IN GND} V_OUT
Now Available in Lead Free Packaging
■ SMPS Post-Regulator
■ Laptop, Palmtop, and Note-
book Computer
■ High Efficiency Linear Power
Supplies
■ Portable Instrumentation
■ Constant Current Regulators
DESCRIPTION
The SPX3940 is a 1A, accurate voltage regulators with a low drop out voltage of 280mV(typical)
at 1A. These regulators are specifically designed for low voltage applications that require a low
dropout voltage and a fast transient response. They are fully fault protected against over-current,
reverse battery, and positive and negative voltage transients.
The SPX3940 is offered in 3-pin SOT-223, TO-220 & TO-263 packages. For a 3A version, refer
to the SPX29300 data sheet.
TYPICAL APPLICATIONS CIRCUIT
V_IN
6.8µF+
1 ^SPX3940 3
2
V_OUT
+10_µF
Figure 1. Fixed Output Linear Regulator.
Date: 5/25/04
SPX3940 1A Low Dropout Voltage Regulator
1
© Copyright 2004 Sipex Corporation