LM9071S National Semiconductor, LM9071S Datasheet

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LM9071S

Manufacturer Part Number
LM9071S
Description
Low-Dropout System Voltage Regulator with Delayed Reset
Manufacturer
National Semiconductor
Datasheets

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LM9071S
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© 1999 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
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).
Typical Application and Connection Diagrams
See NS Package Number T05A
Order Number LM9071T
5-Lead TO-220 Package
DS012832
DS012832-2
DS012832-1
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
(Top View)
Order Number LM9071S
5-Lead TO-220 Package
DS012832-4
December 1999
www.national.com
DS012832-3

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LM9071S Summary of contents

Page 1

... View) 5-Lead TO-220 Package Order Number LM9071T/Flow LB03 See NS Package Number T05D 5-Lead TO-263 Surface Mount Package DS012832-1 Tab and Backside metal on all packages internally connected to ground. Order Number LM9071S See NS Package Number TS5B DS012832-2 December 1999 DS012832-3 DS012832-4 www.national.com ...

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) Electrical Characteristics The ...

Page 3

Typical Performance Characteristics Turn ON Characteristics DS012832-5 Output Voltage at Input Voltage Extremes DS012832-8 Dropout Voltage vs Temperature DS012832-11 = 25˚C unless indicated otherwise Turn OFF Characteristics DS012832-6 Quiescent Current vs Input Voltage DS012832-9 Reset Delay Time vs ...

Page 4

Typical Performance Characteristics Maximum Power Dissipation (TO-220 Package) DS012832-14 Reset Operation and Protection Features Block Diagram www.national.com = 25˚C unless indicated otherwise) (Continued Maximum Power Dissipation (TO-263 Package) DS012832-15 DS012832-16 DS012832-17 4 ...

Page 5

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 fail-safe system performance. FAULT TOLERANT FEATURES While ...

Page 6

Physical Dimensions inches (millimeters) unless otherwise noted www.national.com 5-Lead Molded TO-220 Order Number LM9071T NS Package Number T05A 5-Lead Molded TO-220 Order Number LM9071T/Flow LB03 NS Package Number T05D 6 ...

Page 7

... National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. 5-Lead Molded TO-263 Order Number LM9071S NS Package Number TS5B 2. A critical component is any component of a life ...

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