LX8940

Microsemi

Integrated Products Division

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

Page 1

Copyright

© 2000

Rev. 1.3a, 2005-11-18

5V Low Dropout Regulator

TM

®

DESCRIPTION

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.

IMPORTANT:

PRODUCT H I GHLIGHT

Part

VIN

OUT

GND

LX8940

0.1µF

10µF

5V / 100mA

5.3V

KEY FEATUR ES

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 TO-

220

Drops In Most lM2940 Sockets

APPLI C ATION S

Small Headroom Battery

Applications

High Efficiency Linear

Regulators

Post Regulators For Switching

Power Supplies

Green PC Monitor Applications

T

C

C

V

Load Transient Response

5.00V

4.98V

100mA

0mA

125°C

25°C

-40°C

600

500

400

300

200

100

0

100

500

1000

Dropout Voltage vs. Output

Current v.s Temperature

PACKAGE ORDER INFO

P

Plastic TO-220

3-Pin

RoHS Compliant / Pb-free

Transition DC: 0543

0 to 125

LX8940CP

-40 to 125

LX8940IP

Note: Available in Tape & Reel. Append the letters “TR” to the part

number. (i.e. LX8940IP-TR)