LM9071 Low-Dropout System Voltage Regulator with Delayed Reset
December 1999
LM9071
Low-Dropout System Voltage Regulator with Delayed
Reset
General Description
The LM9071 is a 5V, 250 mA low-dropout voltage regulator.
The regulator features an active low delayed reset output
flag which can be used to reset a microprocessor system on
turn-ON and in the event that the regulator output falls out of
regulation for any reason. An external capacitor programs a
delay time interval before the reset output can return high.
Designed for automotive application the LM9071 contains a
variety of protection features such as reverse battery,
over-voltage shutdown, thermal shutdown, input transient
protection and a wide operating temperature range.
Design techniques have been employed to allow the regula-
tor to remain operational and not generate false reset signals
when subjected to high levels of RF energy (300V/m from
2 MHz to 400 MHz).
Features
n
n
n
n
n
n
n
n
n
n
n
Automotive application reliability
3% output voltage tolerance
Insensitive to radiated RFI
Dropout voltage less than 800 mV with 250 mA output
current
Externally programmed reset delay interval
Thermal shutdown
Short circuit protection
Reverse battery protection
Wide operating temperature range 鈭?0藲C to +125藲C
TO-220 and TO-263 power surface mount power
packages
Pin for pin compatible with the LM2927, L4947 and
TLE4260
Typical Application and Connection Diagrams
(Top View)
5-Lead TO-220 Package
DS012832-3
Order Number LM9071T/Flow LB03
See NS Package Number T05D
5-Lead TO-263 Surface Mount Package
DS012832-1
5-Lead TO-220 Package
DS012832-4
Tab and Backside metal on all packages internally connected to ground.
Order Number LM9071S
See NS Package Number TS5B
DS012832-2
Order Number LM9071T
See NS Package Number T05A
漏 1999 National Semiconductor Corporation
DS012832
www.national.com
1
2
3
4
5
6
7
