LX8940(1999) 查看數據表（PDF） - Microsemi Corporation
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LX8940 Datasheet PDF : 4 Pages
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LX8940
PRODUCT DATABOOK 1996/1997
5V LOW DROPOUT REGULATOR
PRODUCTION DATA SHEET
A B S O L U T E M A X I M U M R AT I N G S (Note 1)
Input Voltage (V ) .......................................................................................... -15V to 26V
IN
Operating Junction Temperature
Plastic (P Package) ................................................................................................ 150°C
Storage Temperature Range ...................................................................... -65°C to 150°C
Lead Temperature (Soldering, 10 seconds) ............................................................. 300°C
Note 1. Exceeding these ratings could cause damage to the device. All voltages are with respect
to Ground. Currents are positive into, negative out of the specified terminal. Pin
numbers refer to DIL packages only.
PACKAGE PIN OUTS
Tab is GROUND
3
2
1
OUTPUT
GND
INPUT
P PACKAGE
(Top View)
T H E R MAL DATA
P PACKAGE:
THERMAL RESISTANCE-JUNCTION TO TAB, θJT
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
3.0°C/W
60°C/W
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The θJA numbers are guidelines for the thermal performance of the device/pc-board system.
All of the above assume no ambient airflow.
BLOCK DIAGRAM
INPUT VOLTAGE
* Required if regulator is located far from power supply filter.
C1*
0.1µF
1 (INPUT)
LX8940
OVERVOLTAGE
THERMAL
SHUTDOWN
REGULATOR
BIAS
1.23V
REFERENCE
3 (OUTPUT)
OUTPUT VOLTAGE
C2
10µF
2 (GND)
2
Copyright © 1999
Rev. 1.3 3/99
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