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PDF LM9070 Data sheet ( Hoja de datos )
| Número de pieza | LM9070 | |
| Descripción | Low-Dropout System Voltage Regulator with Keep-Alive ON/OFF Control | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LM9070 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
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December 1999
LM9070
Low-Dropout System Voltage Regulator with Keep-Alive
ON/OFF Control
General Description
The LM9070 is a 5V, 3% accurate, 250 mA low-dropout volt-
age regulator. The regulator features an active low delayed
reset output flag which can be used to reset a microproces-
sor system on turn-ON and in the event that the regulator
output falls out of regulation for any reason. An external ca-
pacitor programs a delay time interval before the reset out-
put can return high.
Designed for automotive application the LM9070 contains a
variety of protection features such as reverse battery,
over-voltage shutdown, thermal shutdown, input transient
protection and a wide operating temperature range.
A unique two-input logic control scheme is used to enable or
disable the regulator output. An ON/OFF input can be pro-
vided by an ignition switch derived signal while a second,
Keep-Alive input, is generated by a system controller. This
allows for a system to remain ON after ignition has been
switched OFF. The system controller can then execute a
power-down routine and after which command the regulator
OFF to a low quiescent current state (60 µA max).
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 Automotive application reliability
n 3% output voltage tolerance
n Insensitive to radiated RFI
n Dropout voltage less than 800 mV with 250 mA output
current
n Externally programmed reset delay interval
n Keep-alive feature with 2 logic control inputs
n 60V Load dump transient protection
n Thermal shutdown
n Short circuit protection and disable safety features
n Reverse battery protection
n Low OFF quiescent current, 50 µA maximum
n Wide operating temperature range −40˚C to +125˚C
n TO-263 and 20-pin power surface mount packages
n Lead form compatible with TLE4267 TO-220 regulator
(package TA07D)
Connection Diagrams and Ordering Information (Top View)
7-Lead TO-263
Surface Mount Package
20-Pin SO Package
DS012831-1
Backside metal is internally connected to ground.
Order Number LM9070S
See NS Package Number TS7B
Order Number LM9070M
See NS Package Number M20B
DS012831-2
© 1999 National Semiconductor Corporation DS012831
www.national.com
1 page  
Typical Performance Characteristics (TA = 25˚C unless indicated otherwise)
Turn ON Characteristics
Turn OFF Characteristics
Normalized Output Voltage
vs Temperature
DS012831-6
Output Voltage at
Input Voltage Extremes
DS012831-7
Quiescent Current vs
Input Voltage
DS012831-8
Input Current vs
Input Voltage
Regulator Switched OFF
DS012831-9
Dropout Voltage vs
Temperature
Reset Delay Time
vs Temperature
DS012831-10
DS012831-11
Short Circuit Current
vs Temperature
DS012831-12
DS012831-13
DS012831-14
5 www.national.com
5 Page 
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
7-Lead Molded TO-220
Order Number LM9070T
NS Package Number TA07B
11 www.national.com
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet LM9070.PDF ] | |
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| LM9070M | Low-Dropout System Voltage Regulator with Keep-Alive ON/OFF Control | National Semiconductor |
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