LM9076 150mA Ultra-Low Quiescent Current LDO Regulator with Delayed Reset Output General Description Features The LM9076 is a 5 Volt, +/-2%, 150mA logic controlled voltage regulator. The regulator features an active low delayed reset output flag which can be used to reset a microprocessor system at turn-ON and in the event that the regulator input voltage falls below a minimum value. An external capacitor programs a delay time interval before the reset output pin can return high. 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 Designed for automotive and industrial applications, the LM9076 contains a variety of protection features such as thermal shutdown, input transient protection and a wide operating temperature range. The LM9076 uses an PNP pass transistor which allows low drop-out voltage operation. Typical Application 20083030 Package Outline 20083028 20083027 Top View Part Number LM9076BMA–5.0 See NS SOIC Package Number M08A Top View Part Number LM9076S–5.0 See NS TO-263 Package Number TS5 © 2004 National Semiconductor Corporation DS200830 www.national.com LM9076 - 150mA Ultra-Low Quiescent Current LDO Regulator with Delayed Reset Output December 2003 LM9076 Absolute Maximum Ratings (Note 1) VIN(DC) Operating Ratings (Note 1) VIN Pin -15V to +55V 5.35V to 40V VIN(+Transient) t < 10ms, Duty Cycle < 1% +70V VSHUTDOWN Pin VIN(-Transient) t < 1ms, Duty Cycle < 1% -50V Ambient Temperature SHUTDOWN Pin -15V to +52V Thermal Resistance TS5B (Note 6) RESET Pin -0.3V to 20V θja 75˚C/W CDELAY Pin -0.3V to VOUT +0.3V θjc 2.9˚C/W Storage Temperature -65˚C to +150˚C Thermal Resistance M08A (Note 6) 0V to 40V −40˚C < TA < +125˚C Junction Temperature (TJ ) +175C θja 156˚C/W ESD, HBM, per AEC - Q100 - 002 +/-2kV θjc 59˚C/W ESD, MM, per AEC - Q100 - 003 +/-250V Electrical Characteristics for LM9076–5.0 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 V LM9076–5.0 REGULATOR CHARACTERISTICS VOUT ∆VOUT VDO Output Voltage 4.95 5.00 5.05 1mA ≤ ILOAD ≤ 150mA 4.90 5.00 5.10 V VIN = 60V, RLOAD = 1KΩ, t ≤ 40ms 4.50 5.00 5.50 V Output Voltage Off VSHUTDOWN ≥ 2V, RLOAD = 1KΩ – 40 250 mV Reverse Battery VIN = -15V, RLOAD = 1KΩ – 0 –300 mV Line Regulation 9.0V ≤ VIN ≤ 16V, ILOAD = 10mA – 4 25 mV 16V ≤ VIN ≤ 40V, ILOAD = 10mA – 17 25 mV Load Regulation 1mA ≤ ILOAD ≤ 150mA – 42 60 mV Dropout Voltage ILOAD = 10mA – 30 50 mV ILOAD = 50mA – 80 – mV ILOAD = 150mA – 150 250 mV 9V ≤ VIN ≤ 16V, ILOAD = 100uA – 25 35 µA 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 = 2V – 15 25 µA ISC VOUT Short Circuit Current VIN = 14V, RLOAD = 1Ω 200 400 750 mA PSRR Ripple Rejection VIN = (14VDC) + (1VRMS @ 120Hz) ILOAD = 50mA 50 60 (Note 3) – 1.3 IGND Ground Pin Current – dB RESET PIN CHARACTERISTICS VOR www.national.com Minimum VIN for valid RESET Status 2 2.0 V (Continued) 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 0.83 0.89 0.94 X VOUT (Nom) RESET PIN CHARACTERISTICS VTHR VOUT Threshold for RESET Low (Note 3) VOH RESET pin high voltage External pull-up resistor to VOUT = 100kΩ VOUT X 0.90 VOUT X 0.99 VOUT 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 = 0V -0.35 -0.42 -0.50 uA VOL CDELAY pin low voltage VOUT < 4.0V, ISINK = IDELAY — 0.100 — V tDELAY Reset Delay Time VIN = 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) VIH(SD) IIH(SD) IIL(SD) SHUTDOWN Input Low Threshold Voltage VSHUTDOWN pin falling from 5.0V until Vout > 4.5V (Vout = On) 1 1.5 — V SHUTDOWN Input High Threshold Voltage VSHUTDOWN pin rising from 0V until Vout < 0.5V (Vout = Off) — 1.5 2 V SHUTDOWN Pin High Bias Current VSHUTDOWN = 40V — 35 VSHUTDOWN = 5V — 15 35 µA VSHUTDOWN = 2V — 6 10 µA VSHUTDOWN = 0V — 0 — µA SHUTDOWN Input Low Bias Current µA 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 (T J ). 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. 3 www.national.com LM9076 Electrical Characteristics for LM9076–5.0 LM9076 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 www.national.com 20083037 4 LM9076 Typical Performance Characteristics (Continued) Output Voltage vs Junction Temperature 20083038 Application Information REGULATOR BASICS 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 VOUT pin will provide adequate performance in most circumstances. There is no maximum value for the regulator output bypass capacitance. 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 SHUTDOWN 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. INPUT CAPACITOR The LM9076 requires a low source impedance to maintain regulator stability because portions of the internal bias circuitry are connected directly to VIN. At a minimum, at 0.1µF ceramic capacitor should be placed between the LM9076 VIN and Ground pins, as close as is physically possible. OUTPUT CAPACITOR An output capacitor is also required for stability. This capacitor 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 minimum 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 generally maintain capacitance and ESR ratings over a wide temperature 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. 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 typically 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 resistor should be in the range of 10KΩ to 200KΩ. 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 5 www.national.com LM9076 Application Information tDELAY = VOUT X (0.001uF / 0.475uA) tDELAY = 5.0V X (0.001uF / 0.420uA) = 11.9ms (Continued) RESET DELAY TIME THERMAL PROTECTION 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 CDELAY 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 discharged 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 CDELAY capacitor reaches the same potential as the VOUT pin the RESET pin will be allowed to return high. Device operational range is limited by the maximum junction temperature (TJ). The junction temperature is influenced by the ambient temperature (TA), 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. Even though the LM9076 is equipped with circuitry to protect itself from excessive thermal dissipation, it is not recommended that the LM9076 be operated at, or near, the maximum recommended die junction temperature (TJ) 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. The typical RESET delay time can be calculated with the following formula: tDELAY = VOUT X (CDELAY / IDELAY ) For a CDELAY value of 0.001uF and a IDELAY value of 0.475uA the typical RESET delay time is: www.national.com 6 LM9076 Physical Dimensions inches (millimeters) unless otherwise noted 5-Lead Order Number LM9076S NS Package Number TS5B 7 www.national.com LM9076 - 150mA Ultra-Low Quiescent Current LDO Regulator with Delayed Reset Output Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 8-Lead (0.150" Wide) Molded SO Package Order Number LM9076M NS Package Number M08A 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: [email protected] Tel: 1-800-272-9959 www.national.com National Semiconductor Europe Customer Support Center Fax: +49 (0) 180-530 85 86 Email: [email protected] 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: [email protected] National Semiconductor Japan Customer Support Center Fax: 81-3-5639-7507 Email: [email protected] Tel: 81-3-5639-7560 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.