LX8940 Datasheet, PDF (1/4 Pages) Microsemi Corporation – 5V LOW DROPOUT REGULATOR

T H E I N F I N I T E P O W E R O F I N N O VAT I O N
L I N D O C #: 8940
LX8940
5V LOW DROPOUT REGULATOR
PR O D U C T I O N D ATA S H E E T
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.
NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com.
PRODUCT HIGHLIGHT
5.3V
IN
0.1µF
LX8940
GND
OUT
5V/100mA
10µF
KEY FEATURES
s 2% Internally Trimmed Output
s Output Current In Excess Of 1A
s Input-Output Differential
Less Than 0.4V At 1A
p Reverse Battery Protection
p 60V Load Dump Protection
p -50V Reverse Transient Protection
p Short Circuit Protection
p Internal Thermal Overload Protection
p Available In 3-Lead Plastic TO-220
p Drops In Most lM2940 Sockets
A P P L I C AT I O N S
s Small Headroom Battery Applications
s High Efficiency Linear Regulators
s Post Regulators For Switching Power
Supplies
s Green PC Monitor Applications
LOAD TRANSIENT RESPONSE
5.000V
T_A = 25°C C_O = 47µF Electrolytic
C_IN = 1µF
V_IN = 5.30V
4.980V
100mA
0mA
Time - (20µs/Div.)
D R O P O U T V O L TA G E V S . O U T P U T C U R R E N T
VS . TEMPERATURE
600
500
125°C
400
25°C
300
200
-40°C
100
0
100
500
1000
Output Current - (mA)
PACKAGE ORDER INFO
T_A (°C)
P
Plastic TO-220
3-pin
0 to 125
LX8940CP
-40 to 125
LX8940IP
LINFINITY MICROELECTRONICS INC.
Copyright © 1999
Rev. 1.3 3/99
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: [phone]
1