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SPX3940U-2.5-L

Description
Fixed Positive LDO Regulator, 2.5V, 0.55V Dropout, PSFM3, LEAD FREE, TO-220, 3 PIN
CategoryPower/power management    The power supply circuit   
File Size203KB,11 Pages
ManufacturerExar
Environmental Compliance  
Download Datasheet Parametric View All

SPX3940U-2.5-L Overview

Fixed Positive LDO Regulator, 2.5V, 0.55V Dropout, PSFM3, LEAD FREE, TO-220, 3 PIN

SPX3940U-2.5-L Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
MakerExar
Parts packaging codeSFM
package instruction,
Contacts3
Reach Compliance Codecompliant
ECCN codeEAR99
Maximum drop-back voltage 10.55 V
Maximum input voltage16 V
Minimum input voltage3.5 V
JESD-30 codeR-PSFM-T3
JESD-609 codee3
Number of functions1
Number of terminals3
Working temperatureTJ-Max125 °C
Working temperature TJ-Min-40 °C
Maximum output current 11 A
Maximum output voltage 12.588 V
Minimum output voltage 12.412 V
Nominal output voltage 12.5 V
Package body materialPLASTIC/EPOXY
Package shapeRECTANGULAR
Package formFLANGE MOUNT
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Regulator typeFIXED POSITIVE SINGLE OUTPUT LDO REGULATOR
surface mountNO
Terminal surfaceMatte Tin (Sn)
Terminal formTHROUGH-HOLE
Terminal locationSINGLE
Maximum time at peak reflow temperature40
®
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
2
3
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
2
3
+
10µF
V
OUT
Figure 1. Fixed Output Linear Regulator.
Date: 5/25/04
SPX3940 1A Low Dropout Voltage Regulator
© Copyright 2004 Sipex Corporation
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