LM9070 NSC | Alldatasheet

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Technical content

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 DS012831-1 Backside metal is internally connected to ground. Order Number LM9070S See NS Package Number TS7B 20-Pin SO Package DS012831-2 Order Number LM9070M See NS Package Number M20B December 1999 LM9070 Low-Dropout System Voltage Regulator with Keep-Alive ON/OFF Control © 1999 National Semiconductor Corporation DS012831 www.national.com

Connection Diagrams and Ordering Information(Top View) (Continued) 7-Lead TO-220 Package (Odd numbered pins bent forward away from package body) DS012831-3 Tab is internally connected to ground. Order Number LM9070T See NS Package Number TA07B 7-Lead TO-220 Package (Even numbered pins bent forward away from package body) DS012831-4 Tab is internally connected to ground. Order Number LM9070T/Flow LB09 See NS Package Number TA07D LM9070 www.national.com 2

Absolute Maximum Ratings(Note 1) Input Voltage ON/OFF, Keep-Alive Inputs (through 1 kΩ ) DC Input Voltage −26V to +26V Positive Input Transient (t <100 ms) 60V Negative Input Transient (t<1 ms) −50V Reset Output Sink Current 5 mA Power Dissipation Internally Limited Junction Temperature 150˚C ESD Susceptibility (Note 2) 12 kV, 2 kV Lead Temperature (Soldering, 10 seconds) 260˚C Storage Temperature −50˚C to +150˚C Operating Ratings(Note 1) Input Voltage 6V to 26V Ambient Temperature −40˚C to +125˚C θjc, TO-220, TO-263 Packages 3˚C/W θja, TO-220, TO-263 Packages 43˚C/W θj-pins, SO20 Package 25˚C/W θja, SO20 Package 85˚C/WElectrical Characteristics The following specifications apply for VCC = 6V to 26V, −40˚C≤ TA≤ 125˚C, unless otherwise specified. COUT =47 µFd with an ESR < 3Ω .C IN= 1 µFd. Symbol Parameter Conditions Min Max Units REGULATOR OUTPUT V OUT Output Voltage 5 mA ≤ IOUT ≤ 250 mA 4.85 5.15 V ΔVOUT Line Line Regulation I OUT = 5 mA, 9V≤ VIN ≤ 16.5V IOUT = 5 mA, 6V≤ VIN ≤ 26V mV mV ΔVOUT Load Load Regulation V IN = 14.4V, 5 mA≤ IOUT ≤ 250 mA 50 mV Iq Quiescent Current V ON/OFF ≤ VIN IOUT = 5m A IOUT = 250 mA, VIN ≥ 8V IOUT = 5 mA, VIN = 5V IOUT = 250 mA, VIN = 6V mA mA mA mA Ioff OFF Quiescent Current V IN ≤ 16.5V, Regulator OFF 60˚C ≤ TJ ≤ 135˚C µA µA Vdo Dropout Voltage I OUT = 5m A IOUT = 250 mA 300 800 mV mV Isc Short Circuit Current R L = 1Ω 0.4 1.5 A RR Ripple Rejection fripple = 120 Hz, Vripple= 1 Vrms IOUT = 50 mA 60 dB VothOFF Safety VOUT Latch-OFF Threshold In Keep-Alive mode VON/OFF = 0V, VKA = 0V 4 4.5 V OVthr Overvoltage Shutdown Threshold 27 V Vo Transient V OUT during Transients V IN Peak ≤ 60V, R L = 100Ω ,τ = 100 ms 7V RESET OUTPUT Vth Threshold Voltage ΔVOUT Required to Generate a Reset Output 4.85V ≤ V OUT ≤ 5.15V −300 −500 mV Vlow Reset Output Low Voltage Isink = 1.6 mA, VOUT > 3.2V 0.4 V 1.4V ≤ VOUT ≤ 3.2V 0.8 V Vhigh Reset Output High Voltage 0.9 V OUT VOUT V tdelay Delay Time Cdelay = 0.1 µFd 7 31 ms Idelay Charging Current for Cdelay 10 30 µA Rpu Internal Pull-up Resistance 12 80 k Ω CONTROL LOGIC V KA low Low Input Threshold Voltage, Keep-Alive Input 3.5V ≤ VOUT ≤ 5.25V 0.3 V OUT 0.5 VOUT V LM9070 www.national.com3

Electrical Characteristics(Continued) The following specifications apply for VCC = 6V to 26V, −40˚C≤ TA≤ 125˚C, unless otherwise specified. COUT =47 µFd with an ESR < 3Ω .C IN= 1 µFd. Symbol Parameter Conditions Min Max Units CONTROL LOGIC V KA high High Input Threshold Voltage, Keep-Alive Input 3.5V ≤ VOUT ≤ 5.25V 0.6 V OUT 0.8 VOUT V VON/OFF low Low Input Voltage, ON/OFF Input Rseries = 1k Ω −2 2 V VON/OFF high High Input Voltage, ON/OFF Input Rseries= 1k Ω 42 6 V ION/OFF Input Current, ON/OFF Input V ON/OFF ≤ 4V 330 µA 4V < VON/OFF < 7V 670 µA VON/OFF ≥ 7V 10 mA Rpu KA Internal Pull-up Resistance, Keep-Alive Input 0V ≤ VIN ≤ 26V 20 100 k Ω Rpd ON/OFF Internal Pull-down Resistance ON/OFF Input 0V ≤ VON/OFF ≤ 26V 50 210 k Ω Note 1: Absolute Maximum Ratingsindicate limits beyond which damage to the device may occur.Operating Ratingsindicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and conditions, see theElectrical Characteristics. Note 2:All pins will survive an ESD impulse of±2000V using the human body model of 100 pF discharged through a 1.5 kΩ resistor. In addition, input pins VIN and the ON/OFF input will withstand ten pulses of±12 kV from a 150 pF capacitor discharged through a 560Ω resistor with each pin bypassed with a 22 nF, 100V ca- pacitor. Reset Operation and Protection Features DS012831-5 LM9070 www.national.com 4

Typical Performance Characteristics(TA = 25˚C unless indicated otherwise) Turn ON Characteristics DS012831-6 Turn OFF Characteristics DS012831-7 Normalized Output Voltage vs Temperature DS012831-8 Output Voltage at Input Voltage Extremes DS012831-9 Quiescent Current vs Input Voltage DS012831-10 Input Current vs Input Voltage Regulator Switched OFF DS012831-11 Dropout Voltage vs Temperature DS012831-12 Reset Delay Time vs Temperature DS012831-13 Short Circuit Current vs Temperature DS012831-14 LM9070 www.national.com5

Typical Performance Characteristics(TA = 25˚C unless indicated otherwise) (Continued) ON/OFF, Keep-Alive and Safety Latch-Off Control Diagrams Note:If Keep-Alive is provided by a microprocessor powered by the output voltage of the LM9070, the logic “1” voltage level will track VOUT as the regulator turns OFF. Output Capacitor ESR DS012831-15 Maximum Power Dissipation (TO-220 Package) DS012831-16 Maximum Power Dissipation (TO-263 and SO-20 Packages) DS012831-17 Simple ON/OFF control (Keep-Alive input must be high to turn OFF output) DS012831-18 Keep-Alive Mode; Turn ON with ON/OFF control, Keep output biased with Keep-Alive input, Turn OFF with Keep-Alive (Keep-Alive low keeps output ON, Keep-Alive going high turns output OFF) DS012831-19 Switch ON with ON/OFF input; Keep output biased with Keep-Alive; Hold ouput ON with ON/OFF; Turn OFF with ON/OFF input. (Temporary Keep-Alive Mode) DS012831-20 Safety Latch OFF of VOUT when in Keep-Alive Mode (ON/OFF going high required to turn Output back ON) DS012831-21 LM9070 www.national.com 6

Output Operating Condition L X 0V L Low quiescent current standby (OFF) condition ↑ X5 V ↑ after delay Output turns ON H X 5V H Normal ON condition ↓ H 0V L Output turns OFF ↓ L 5V H Output kept ON by Keep-Alive Input ↑ L 5V H Output remains ON (or turns ON) HX ΔVOUT ≥ −300 mV L Output pulled out of regulation, reset flag generated LL V OUT ≤ 4V L Output latches OFF Block Diagram

Application Information

The LM9070 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 not specifically guaranteed due to production testing limitations, the LM9070 has been tested and shown to con- tinue to provide a regulated output and, not generate an er- roneous system reset signal while subjected to high levels of RF electric field energy (up to 300 V/m signal strength over a 2 MHz to 400 MHz frequency range). This is very important in vehicle safety related applications where the system must continue to operate normally. To maintain this immunity to RFI the output bypass capacitor is important (47 µF is rec- ommended). This regulator is suitable for applications where continuous connection to the battery is required ( Refer to the Typical Ap- plication Circuit). ON/OFF control of the regulator and sys- tem can be accomplished by switching the ON/OFF input to the battery or ignition supply V IN supply through a SPST switch. If this input becomes open circuited, an internal pull-down resistor ensures that the regulator turns OFF. When the regulator is switched OFF the current load on the battery drops to less than 60 µA. With the possibility in many applications for V IN and the ON/OFF input pins to be con- nected in a system through long lengths of wire, the ESD protection of these pins has been increased to 12 kV with the addition of small input bypass capacitors. DS012831-22 DS012831-23 FIGURE 1. Typical Application Circuit

Application Information(Continued) DS012831-25 LM9070 www.national.com9

Physical Dimensionsinches (millimeters) unless otherwise noted 20-Lead (0.300" Wide) Molded Small Outline Package, JEDEC Order Number LM9070M LM9070 www.national.com 10

Physical Dimensionsinches (millimeters) unless otherwise noted (Continued) 7-Lead Molded TO-220 Order Number LM9070T LM9070 www.national.com11

Physical Dimensionsinches (millimeters) unless otherwise noted (Continued) 7-Lead Molded TO-220 Order Number LM9070T/Flow LB09 7-Lead Molded TO-263 Order Number LM9070S LM9070 www.national.com 12

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 into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. National Semiconductor Corporation Americas Tel: 1-800-272-9959 Fax: 1-800-737-7018 Email: support@nsc.com National Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 1 80-530 85 85 English Tel: +49 (0) 1 80-532 78 32 Français Tel: +49 (0) 1 80-532 93 58 Italiano Tel: +49 (0) 1 80-534 16 80 National Semiconductor Asia Pacific Customer Response Group Tel: 65-2544466 Fax: 65-2504466 Email: sea.support@nsc.com National Semiconductor Japan Ltd. Tel: 81-3-5639-7560 Fax: 81-3-5639-7507 www.national.com LM9070 Low-Dropout System Voltage Regulator with Keep-Alive ON/OFF Control 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.