LX8940_05 Datasheet, PDF (1/6 Pages) Microsemi Corporation – 5V Low Dropout Regulator

LX8940
TM
®
5V Low Dropout Regulator
PRODUCTION DATA SHEET
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: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
PRODUCT HIGHLIGHT
5.3V
0.1µF
LX8940
VINParOt UT
GND
5V / 100mA
10µF
KEY FEATURES
ƒ 2% Internally Trimmed Output
ƒ Output Current In Excess Of
1A
ƒ Input-Output Differential Less
Than 0.4V At 1A
ƒ Reverse Battery Protection
ƒ 60V Load Dump Protection
ƒ -50V Reverse Transient
Protection
ƒ Short Circuit Protection
ƒ Internal Thermal Overload
Protection
ƒ Available In 3-Lead Plastic TO-
220
ƒ Drops In Most lM2940 Sockets
APPLICATIONS
ƒ Small Headroom Battery
Applications
ƒ High Efficiency Linear
Regulators
ƒ Post Regulators For Switching
Power Supplies
ƒ Green PC Monitor Applications
Load Transient Response
5.00V
T_A = 25°C
C_IN = 1µF
V_IN = 5.3V
C_O = 47µF Electrolytic
4.98V
Dropout Voltage vs. Output
Current v.s Temperature
600
500
125°C
400
25°C
300
100mA
0mA
Time (20µS / Div.)
200
-40°C
100
0
100
500
1000
Output Current (mA)
PACKAGE ORDER INFO
T_A (°C)
Plastic TO-220
P _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)
Copyright © 2000
Rev. 1.3a, 2005-11-18
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
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