LX8940| Datasheet

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LX8940
TM

5V Low Dropout Regulator
P RODUCTION D ATA S HEET

DESCRIPTION

KEY FEATURES 2% Internally Trimmed Output Output Current In Excess Of 1A Input-Output Differential Less Than 0.4V At 1A Reverse Battery Protection 60V Load Dump Protection -50V Reverse Transient Protection Short Circuit Protection Internal Thermal Overload Protection Available In 3-Lead Plastic TO220 Drops In Most lM2940 Sockets
APPLICATIONS

The LX8940 is a 5V, low dropout, low quiescent current regulator rated for 1A of output current. It can regulate with as low as 0.4V headroom between the input and output voltages, thus minimizing power dissipation. In addition, it can be used in applications where worst

case supplies require a low input-output differential to maintain regulation. This feature makes it ideal for computer monitors that have to comply with energy-efficient / "Green PC" programs, where the input voltage drops to only a few tenths of a volt above the output when power supply enters sleep-mode operation.

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IMPORTANT: For the most current data, consult MICROSEMI's website: http://www.microsemi.com

PRODUCT HIGHLIGHT

5.3V
0.1uF

LX8940 VINPart OUT
GND
10uF

5V / 100mA

Small Headroom Battery Applications High Efficiency Linear Regulators Post Regulators For Switching Power Supplies Green PC Monitor Applications

Load Transient Response
600 TA = 25 C CO = 47uF Electrolytic

Dropout Voltage vs. Output Current v.s Temperature

Output Voltage

CIN = 1uF (20mV/ Div.) VIN = 5.3V 5.00V 500 125 C

Dropout Voltage (mV)

400 25 C

4.98V

300

Output Current

(50mA/ Div.)

200

100mA

-40 C 100 0mA 0 100 500 1000

Time (20uS / Div.)

Output Current (mA)

PACKAGE ORDER INFO

LX8940 LX8940

TA ( C) 0 to 125 -40 to 125

P

Plastic TO-220 3-Pin
RoHS Compliant / Pb-free Transition DC: 0543

LX8940CP LX8940IP

Note: Available in Tape & Reel. Append the letters "TR" to the part number. (i.e. LX8940IP-TR)

Copyright 2000 Rev. 1.3a, 2005-11-18

Microsemi
Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

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LX8940 DATASHEET