LM9076

LM9076 NSC | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 8

Technical content

Features

n Ultra Low Ground Pin Current, 25µA typical for 100µA load n VOUT initial accuracy of +/-1% n VOUT accurate to +/2% over Load and Temperature Conditions n Low Dropout Voltage, 200mV typical with 150mA load n Low Off State Ground Pin current n Delayed RESET output pin for low VOUT detection n +70V/-50V Voltage Transients n Operational VIN up to +40V Typical Application 20083030 Package Outline 20083027 Top View Part Number LM9076S–5.0 See NS TO-263 Package Number TS5 20083028 Top View Part Number LM9076BMA–5.0 See NS SOIC Package Number M08A December 2003 LM9076 - 150mA Ultra-Low Quiescent Current LDO Regulator with Delayed Reset Output © 2004 National Semiconductor Corporation DS200830 www.national.com

Absolute Maximum Ratings (Note 1) VIN(DC) -15V to +55V VIN(+Transient) t< 10ms, Duty Cycle<1% +70V VIN(-Transient) t< 1ms, Duty Cycle<1% -50V SHUTDOWN Pin -15V to +52V RESET Pin -0.3V to 20V CDELAY Pin -0.3V to V OUT +0.3V Storage Temperature -65˚C to +150˚C Junction Temperature (T J ) +175C ESD, HBM, per AEC - Q100 - 002 +/-2kV ESD, MM, per AEC - Q100 - 003 +/-250V Operating Ratings (Note 1) VIN Pin 5.35V to 40V VSHUTDOWN Pin 0V to 40V Ambient Temperature −40˚C < TA < +125˚C Thermal Resistance TS5B (Note 6) θja 75˚C/W θjc 2.9˚C/W Thermal Resistance M08A (Note 6) θja 156˚C/W θjc 59˚C/W The following specifications apply for VIN= 14V; VSHUTDOWN = Open; ILOAD = 10mA; TA = +25˚C; COUT = 10µF, 0.5Ω < ESR < 4.0Ω; unless otherwise specified.Bold Values indicate −40˚C ≤ TA≤ 125˚C. (Note 4, Note 5) Symbol Parameter Conditions Min Typ Max Units LM9076–5.0 REGULATOR CHARACTERISTICS V OUT Output Voltage 4.95 5.00 5.05 V 1mA ≤ ILOAD ≤ 150mA 4.90 5.00 5.10 V VIN = 60V, RLOAD =1 KΩ,t ≤ 40ms 4.50 5.00 5.50 V Output Voltage Off V SHUTDOWN ≥ 2V, RLOAD =1 KΩ – 40 250 mV Reverse Battery V IN = -15V, RLOAD =1 KΩ – 0 –300 mV ∆VOUT Line Regulation 9.0V ≤ VIN ≤ 16V, ILOAD = 10mA – 4 25 mV 16V ≤ VIN ≤ 40V, ILOAD = 10mA –1 7 2 5 m V Load Regulation 1mA ≤ ILOAD ≤ 150mA – 42 60 mV VDO Dropout Voltage I LOAD = 10mA – 30 50 mV ILOAD = 50mA – 80 – mV ILOAD = 150mA – 150 250 mV IGND Ground Pin Current 9V ≤ VIN ≤ 16V, ILOAD = 100uA –2 5 3 5 µ A 9V ≤ VIN ≤ 40V, ILOAD = 10mA – 125 160 µA 9V ≤ VIN ≤ 40V, ILOAD = 50mA – 0.6 – mA 9V ≤ VIN ≤ 16V, ILOAD = 150mA – 3.6 4.5 mA Ground Pin Current in Shut- down Mode 9V ≤ VIN ≤ 40V, VSHUTDOWN =2 V –1 5 2 5 µ A ISC VOUT Short Circuit Current VIN = 14V, RLOAD =1 Ω 200 400 750 mA PSRR Ripple Rejection V IN = (14VDC)+ (1VRMS @ 120Hz) ILOAD = 50mA 50 60 dB RESET PIN CHARACTERISTICS VOR Minimum VIN for valid RESET Status (Note 3) – 1.3 2.0 V LM9076 www.national.com 2

The following specifications apply for VIN= 14V; VSHUTDOWN = Open; ILOAD = 10mA; TA = +25˚C; COUT = 10µF, 0.5Ω < ESR < 4.0Ω; unless otherwise specified.Bold Values indicate −40˚C ≤ TA≤ 125˚C. (Note 4, Note 5) Symbol Parameter Conditions Min Typ Max Units RESET PIN CHARACTERISTICS VTHR VOUT Threshold for RESET Low (Note 3) 0.83 0.89 0.94 X V OUT (Nom) VOH RESET pin high voltage External pull-up resistor to VOUT = 100kΩ VOUT X 0.90 V OUT X 0.99 V OUT V VOL RESET pin low voltage CDELAY < 4.0V, ISINK = 250µA – 0.2 0.3 V CDELAY PIN CHARACTERISTICS IDELAY CDELAY Charging Current VIN = 14V, VDELAY =0 V VOL CDELAY pin low voltage VOUT < 4.0V, ISINK =I DELAY — 0.100 — V tDELAY Reset Delay Time V IN = 14V, CDELAY = 0.001uF VOUT rising from 0V, ∆t from VOUT > VOR to RESET pin HIGH 9.5 11.9 14.3 ms SHUTDOWN CONTROL LOGIC — LM9076BMA Only VIL(SD) SHUTDOWN Input Low Threshold Voltage V SHUTDOWN pin falling from 5.0V until Vout >4.5V (Vout = On) 1 1.5 — V VIH(SD) SHUTDOWN Input High Threshold Voltage V SHUTDOWN pin rising from 0V until Vout< 0.5V (Vout = Off) — 1.5 2 V IIH(SD) SHUTDOWN Pin High Bias Current VSHUTDOWN = 40V — 35 µA VSHUTDOWN = 5V — 15 35 µA VSHUTDOWN =2 V — 6 1 0 µ A IIL(SD) SHUTDOWN Input Low Bias Current VSHUTDOWN = 0 V—0— µ A Note 1: Absolute Maximum Ratings indicate the limits beyond which the device may cease to function, and/or damage to the device may occur. Note 2: Operating Ratings indicate conditions for which the device is intended to be functional, but does not guarantee specific performance limits. For guaranteed specifications and conditions refer to the Electrical Characteristics Note 3: Not Production tested, Guaranteed by Design. Minimum, Typical, and/or Maximum values are provided for informational purposes only. Note 4: Pulse testing used maintain constant junction temperature (TJ ). Note 5: The regulated output voltage specification is not guaranteed for the entire range of VIN and ouput loads. Device operational range is limited by the maximum junction temperature (TJ ). The junction temperature is influenced by the ambient temperature (T A ), package selection, input voltage (VIN ), and the output load current. When operating with maximum load currents the input voltage and/or ambient temperature will be limited. When operating with maximum input voltage the load current and/or the ambient temperature will be limited. Note 6: Worst case (FREE AIR) per EIA/JESD51–3. LM9076 www.national.com3

Typical Performance Characteristics Output Capacitor ESR Output Capacitor ESR 20083031 20083032 Low Voltage Behavior High Voltage Behavior 20083033 20083034 Dropout Voltage Ground Pin Current vs Load Current 20083036 20083037 LM9076 www.national.com 4

Typical Performance Characteristics (Continued) Output Voltage vs Junction Temperature 20083038

Application Information

This regulator is suitable for Automotive applications where continuous connection to the battery is required (refer to the Typical Application circuit). The pass transistor of the regulator is an PNP device. A 10uF capacitor on the V OUT pin will provide adequate performance in most circumstances. There is no maximum value for the regulator output bypass capacitance. INPUT CAPACITOR The LM9076 requires a low source impedance to maintain regulator stability because portions of the internal bias cir- cuitry are connected directly to V IN. At a minimum, at 0.1µF ceramic capacitor should be placed between the LM9076 V IN and Ground pins, as close as is physically possible. OUTPUT CAPACITOR An output capacitor is also required for stability. This capaci- tor must be placed between the LM9076 VOUT and Ground pins, as close as is physically possible, using traces that are not part of the main load current path. The output capacitor must meet the requirements for mini- mum capacitance and also maintain the appropriate ESR value of the full operating ambient temperature range to assure stability. There is no maximum limit for the output capacitance value, as long as ESR is maintained. See the Typical Performance Characteristics curves for details. Solid tantalum capacitors are recommended as they gener- ally maintain capacitance and ESR ratings over a wide tem- perature range. Ceramic capacitor types XR7 and X5R may be used if a series resistor is added to simulate the ESR requirement. Aluminum electrolytic capacitors are not recommend, as they are subject to wide changes in capacitance and ESR values across temperature. DELAY CAPACITOR The capacitor on the Delay pin must be a low leakage type since the charge current is minimal (500nA typical) and the pin must fully charge to 5V. Ceramic, Mylar, and polystyrene capacitor types are generally recommended, although changes in capacitance values across temperature changes will have some effect on the delay timing. SHUTDOWN PIN The basic On/Off control of the regulator is accomplished with the SHUTDOWN pin. By pulling the SHUTDOWN pin high the regulator output is switched Off. When the regulator is switched Off the load on the battery will be primarily due to the SHUTDOWN pin current. When the SHUTDOWN pin is low, or left open, the regulator is switched On. When an unregulated supply, such as V BATTERY , is used to pull the SHUTDOWN pin high a series resistor in the range of 10KΩ to 50KΩ is recommended to provide reverse voltage transient protection of the SHUT- DOWN pin. Adding a small capacitor (0.001uF typical) from the SHUTDOWN pin to Ground will add noise immunity to prevent accidental turn on due to noise on the supply line. RESET FLAG Proper operation of the RESET circuity is not guaranteed for VIN voltages of less than 2.0V. The RESET pin will provide information on the status of the regulator VOUT voltage level. Any condition that causes the VOUT voltage to drop to typi- cally 89% normal would cause the RESET pin to go low. This will warn of a system Vcc supply that may cause abnormal operation. Of course, when the regulator is switched Off in normal operation the RESET pin will be low. If the regulator is On, and then switched off, the RESET flag will go low when the VOUT voltage stored on the output capacitor has decayed adequately. Excessive thermal dissipation of the device such that the Thermal Shutdown circuit is activated which then switches the regulator output Off, would cause the RESET pin to go low. The RESET pin is an open collector output and requires an external pull-up resistor to VOUT . The external pull-up resis- tor should be in the range of 10KΩ to 200KΩ. LM9076 www.national.com5

Application Information (Continued) RESET DELAY TIME When the regulator output is switched On, or after recovery from brief VOUT fault condition, the RESET flag can be can be programmed to remain low for an additional delay time. This will give time for any system reference voltages, clock signals, etc., to stabilize before the micro-controller resumes normal operation. This delay time is controlled by the capacitor value on the C DELAY pin. During normal operation the CDELAY capacitor is charged to near VOUT . When a VOUT fault causes the RESET pin to go low, the CDELAY capacitor is quickly dis- charged to ground. When the VOUT fault is removed, and VOUT returns to the normal operating value, the CDELAY capacitor begins charging at a typical constant 0.420uA rate. When the voltage on the C DELAY capacitor reaches the same potential as the VOUT pin the RESET pin will be allowed to return high. The typical RESET delay time can be calculated with the following formula: tDELAY =V OUT X( CDELAY /I DELAY ) F o raC DELAY value of 0.001uF and a I DELAY value of 0.475uA the typical RESET delay time is: tDELAY =V OUT X (0.001uF / 0.475uA) tDELAY = 5.0V X (0.001uF / 0.420uA) = 11.9ms THERMAL PROTECTION Device operational range is limited by the maximum junction temperature (TJ). The junction temperature is influenced by the ambient temperature (TA), package selection, input volt- age (VIN), and the output load current. When operating with maximum load currents the input voltage and/or ambient temperature will be limited. When operating with maximum input voltage the load current and/or the ambient tempera- ture will be limited. Even though the LM9076 is equipped with circuitry to protect itself from excessive thermal dissipation, it is not recom- mended that the LM9076 be operated at, or near, the maxi- mum recommended die junction temperature (T J) as this may impair long term device reliability. The thermal protection circuity monitors the temperature at the die level. When the die temperature exceeds typically 160C the voltage regulator output will be switched off. LM9076 www.national.com 6

Physical Dimensions inches (millimeters) unless otherwise noted 5-Lead Order Number LM9076S LM9076 www.national.com7

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 8-Lead (0.150" Wide) Molded SO Package Order Number LM9076M LIFE SUPPORT POLICY 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. BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. National Semiconductor Americas Customer Support Center Email: new.feedback@nsc.com Tel: 1-800-272-9959 National Semiconductor Europe Customer Support Center Fax: +49 (0) 180-530 85 86 Email: europe.support@nsc.com Deutsch Tel: +49 (0) 69 9508 6208 English Tel: +44 (0) 870 24 0 2171 Français Tel: +33 (0) 1 41 91 8790 National Semiconductor Asia Pacific Customer Support Center Email: ap.support@nsc.com National Semiconductor Japan Customer Support Center Fax: 81-3-5639-7507 Email: jpn.feedback@nsc.com Tel: 81-3-5639-7560 www.national.com LM9076 - 150mA Ultra-Low Quiescent Current LDO Regulator with Delayed Reset Output 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.