lm9071t National Semiconductor Corporation, lm9071t Datasheet

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lm9071t

Manufacturer Part Number
lm9071t
Description
Low-dropout System Voltage Regulator With Delayed Reset
Manufacturer
National Semiconductor Corporation
Datasheet

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LM9071T
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NS
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© 2004 National Semiconductor Corporation
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 protec-
tion and a wide operating temperature range.
Design techniques have been employed to allow the regu-
lator 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).
Typical Application and Connection Diagrams
(Top View)
See NS Package Number T05A
Order Number LM9071T
5-Lead TO-220 Package
DS012832
01283202
01283201
Features
n Automotive application reliability
n 3% output voltage tolerance
n Insensitive to radiated RFI
n Dropout voltage less than 800 mV with 250 mA output
n Externally programmed reset delay interval
n Thermal shutdown
n Short circuit protection
n Reverse battery protection
n Wide operating temperature range −40˚C to +125˚C
n TO-220 and TO-263 power surface mount power
n Pin for pin compatible with the LM2927, L4947 and
Tab and Backside metal on all packages internally connected to ground.
current
packages
TLE4260
5-Lead TO-263 Surface Mount Package
Order Number LM9071T/Flow LB03
See NS Package Number TS5B
See NS Package Number T05D
Order Number LM9071S
5-Lead TO-220 Package
01283204
www.national.com
March 2001
01283203

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lm9071t Summary of contents

Page 1

... TO-220 and TO-263 power surface mount power packages n Pin for pin compatible with the LM2927, L4947 and TLE4260 Order Number LM9071T/Flow LB03 See NS Package Number T05D 5-Lead TO-263 Surface Mount Package 01283201 Tab and Backside metal on all packages internally connected to ground. ...

Page 2

Absolute Maximum Ratings DC Input Voltage < Positive Input Transient (t 100 ms) < Negative Input Transient (t 1 ms) Reset Output Sink Current Power Dissipation Junction Temperature ESD Susceptibility (Note 2) Lead Temperature (Soldering, 10 seconds) Storage Temperature Electrical ...

Page 3

Typical Performance Characteristics (T = 25˚C unless indicated otherwise) A Turn ON Characteristics Normalized Output Voltage vs Temperature Quiescent Current vs Input Voltage Turn OFF Characteristics 01283205 01283207 01283209 3 01283206 Output Voltage at Input Voltage Extremes 01283208 Short Circuit ...

Page 4

Typical Performance Characteristics Dropout Voltage vs Temperature Output Capacitor ESR Maximum Power Dissipation (TO-263 Package) www.national.com (T = 25˚C unless indicated otherwise) (Continued) A 01283211 Maximum Power Dissipation 01283213 01283215 4 Reset Delay Time vs Temperature 01283212 (TO-220 Package) 01283214 ...

Page 5

Reset Operation and Protection Features Block Diagram Application Hints The LM9071 voltage regulator has been optimized for use in microprocessor based automotive systems. Several unique design features have been incorporated to address many FMEA (Failure Mode Effects Analysis) concerns for ...

Page 6

Application Hints (Continued) RESET FLAG Excessive loading of the output to the point where the output voltage drops by 300 mV to 500 mV will signal a reset flag to the micro. This will warn supply that ...

Page 7

... Physical Dimensions inches (millimeters) unless otherwise noted 5-Lead Molded TO-220 Order Number LM9071T NS Package Number T05A 7 www.national.com ...

Page 8

... Physical Dimensions www.national.com inches (millimeters) unless otherwise noted (Continued) 5-Lead Molded TO-220 Order Number LM9071T/Flow LB03 NS Package Number T05D 8 ...

Page 9

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

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