LM2936M-5.0

LM2936-5.0 Ultra-Low Quiescent Current 5V Regulator June 2002 LM2936-5.0 Ultra-Low Quiescent Current 5V Regulator General Description The LM2936 ultra-low quiescent current regulator features low dropout voltage and low current in the standby mode. With less than 15 µA quiescent current at a 100 µA load, the LM2936 is ideally suited for automotive and other battery operated systems. The LM2936 retains all of the features that are common to low dropout regulators including a low dropout PNP pass device, short circuit protection, reverse battery protection, and thermal shutdown. The LM2936 has a 40V maximum operating voltage limit, a −40˚C to +125˚C operating temperature range, and ± 3% output voltage tolerance over the entire output current, input voltage, and temperature range. The LM2936 is available in a TO-92 package, a SO-8 surface mount package, and a TO-252 surface mount power package. Features n n n n n n n n n n n n Ultra low quiescent current (IQ ≤ 15 µA for IO = 100 µA) Fixed 5V, 50 mA output ± 2% Initial output tolerance ± 3% Output tolerance over line, load, and temperature Dropout voltage typically 200 mV @ IO = 50 mA Reverse battery protection −50V reverse transient protection Internal short circuit current limit Internal thermal shutdown protection 40V operating voltage limit 60V operating voltage limit for LM2936HV Shutdown Pin available with LM2936BM package Typical Application 00975901 * Required if regulator is located more than 2" from power supply filter capacitor. ** Required for stability. Must be rated for 10 µF minimum over intended operating temperature range. Effective series resistance (ESR) is critical, see curve. Locate capacitor as close as possible to the regulator output and ground pins. Capacitance may be increased without bound. Connection Diagrams TO-252 SOT-223 00975925 00975926 Top View Order Number LM2936DT-5.0 See NS Package Number TD03B Top View Order Number LM2936MP-5.0 See NS Package Number MA04A © 2002 National Semiconductor Corporation DS009759 www.national.com LM2936-5.0 Connection Diagrams 8-Pin SO (M) (Continued) 8-Pin SO (M) 00975906 00975927 Top View Order Number LM2936M-5.0, LM2936HVMA-5.0 See NS Package Number M08A TO-92 Top View Order Number LM2936BM-5.0 See NS Package Number M08A 8-Pin Mini SOIC (MM) 00975902 Bottom View Order Number LM2936Z-5.0 See NS Package Number Z03A 00975928 Top View Order Number LM2936MM-5.0 See NS Package Number MUA08A www.national.com 2 LM2936-5.0 Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Input Voltage (Survival) ESD Susceptibility (Note 2) Power Dissipation (Note 3) Junction Temperature (TJmax) Storage Temperature Range Lead Temperature (Soldering, 10 sec.) +60V, −50V 2000V Internally limited 150˚C −65˚C to +150˚C 260˚C Maximum Operating Input Voltage LM2936 Maximum Operating Input Voltage LM2936HV only Maximum Shutdown Pin Voltage LM2936BM only TO-92 (Z03A) θJA MSO-8 (MUA08A) θJA SO-8 (M08A) θJA SO-8 (M08A) θJC TO-252 (TD03B) θJA TO-252 (TD03B) θJC +40V +60V 0V to 40V 195˚C/W 200˚C/W 140˚C/W 45˚C/W 136˚C/W 6˚C/W 149˚C/W 36˚C/W Operating Ratings Operating Temperature Range −40˚C to +125˚C SOT-223 (MA04A) θJA SOT-223 (MA04A) θJC Electrical Characteristics VIN = 14V, IO = 10 mA, TJ = 25˚C, unless otherwise specified. Boldface limits apply over entire operating temperature range Parameter LM2936HV Only Output Voltage Line Regulation All LM2936 4.90 Output Voltage Quiescent Current 5.5V ≤ VIN ≤ 26V, 100 µA ≤ IO ≤ 50 mA (Note 6) IO = 100 µA, 8V ≤ VIN ≤ 24V IO = 10 mA, 8V ≤ VIN ≤ 24V IO = 50 mA, 8V ≤ VIN ≤ 24V Line Regulation Load Regulation Dropout Voltage Short Circuit Current Output Impedance Output Noise Voltage Long Term Stability Ripple Rejection Reverse Polarity Transient Input Voltage Output Voltage with Reverse Polarity Input Maximum Line Transient RL = 500Ω, VO ≤ 5.5V, T = 40ms 60 V VIN = −15V, RL = 500Ω 0.00 −0.30 V Vripple = 1Vrms, = 120 Hz −40 −50 9V ≤ VIN ≤ 16V 6V ≤ VIN ≤ 40V, IO = 1 mA 100 µA ≤ IO ≤ 5 mA 5 mA ≤ IO ≤ 50 mA IO = 100 µA IO = 50 mA VO = 0V IO = 30 mAdc and 10 mArms, f Conditions Min (Note 5) Typical (Note 4) Max (Note 5) Units 5.5V ≤ VIN ≤ 48V, 100 µA ≤ IO ≤ 50 mA (Note 6) 6V ≤ VIN ≤ 60V, IO = 1mA 4.85 5.00 15 5.00 5.00 9 0.20 1.5 5 10 10 10 0.05 0.20 5.15 35 5.10 5.15 15 0.50 2.5 10 30 30 30 0.10 0.40 250 V mV 4.85 V µA mA mA mV mV V V mA mΩ µV mV/1000 Hr dB V 65 120 450 500 20 −60 −80 = 1000 Hz 10 Hz–100 kHz fripple RL = 500Ω, T = 1 ms 3 www.national.com LM2936-5.0 Electrical Characteristics Parameter Output Bypass Capacitance (COUT) ESR Output Voltage, VOUT Shutdown High Threshold Voltage, VIH Shutdown Low Threshold Voltage, VIL Shutdown High Current, IIH Quiescent Current (Continued) VIN = 14V, IO = 10 mA, TJ = 25˚C, unless otherwise specified. Boldface limits apply over entire operating temperature range Conditions COUT = 10µF 0.1mA ≤ IOUT ≤ 50mA Output Off, VSD =2.4V, RLOAD = 500Ω Output Off, RLOAD = 500Ω Output On, RLOAD = 500Ω Output Off, VSD = 2.4V, RLOAD = 500Ω Output Off, VSD = 2.4V, RLOAD = 500Ω Includes IIHCurrent 2.00 Min (Note 5) 0.3 Typical (Note 4) Max (Note 5) 8 Units Ω Shutdown Input − LM2936BM Only 0 1.1 1.1 12 30 0.60 0.010 V V V µA µA Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating the device beyond its specified operating ratings. Note 2: Human body model, 100 pF discharge through a 1.5 kΩ resistor. Note 3: The maximum power dissipation is a function of TJmax, θJA, and TA. The maximum allowable power dissipation at any ambient temperature is PD = (TJmax − TA)/θJA. If this dissipation is exceeded, the die temperature will rise above 150˚C and the LM2936 will go into thermal shutdown. Note 4: Typicals are at 25˚C (unless otherwise specified) and represent the most likely parametric norm. Note 5: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis. Note 6: To ensure constant junction temperature, pulse testing is used. Typical Performance Characteristics Maximum Power Dissipation (TO-92) Dropout Voltage Dropout Voltage 00975907 00975908 00975909 Quiescent Current Quiescent Current Quiescent Current 00975910 00975911 00975912 www.national.com 4 LM2936-5.0 Typical Performance Characteristics Quiescent Current (Continued) Output Capacitor ESR Quiescent Current 00975913 00975914 00975915 Peak Output Current Peak Output Current Current Limit 00975916 00975917 00975918 Line Transient Response Output at Voltage Extremes Ripple Rejection 00975919 00975920 00975921 Load Transient Response Low Voltage Behavior Output Impedance 00975922 00975923 00975924 5 www.national.com LM2936-5.0 Applications Information Unlike other PNP low dropout regulators, the LM2936 remains fully operational to 40V. Owing to power dissipation characteristics of the available packages, full output current cannot be guaranteed for all combinations of ambient temperature and input voltage. As an example, consider an LM2936Z operating at 25˚C ambient. Using the formula for maximum allowable power dissipation given in (Note 3) , we find that PDmax = 641 mW at 25˚C. Including the small contribution of the quiescent current to total power dissipation the maximum input voltage (while still delivering 50 mA output current) is 17.3V. The LM2936Z will go into thermal shutdown if it attempts to deliver full output current with an input voltage of more than 17.3V. Similarly, at 40V input and 25˚C ambient the LM2936Z can deliver 18 mA maximum. Under conditions of higher ambient temperatures, the voltage and current calculated in the previous examples will drop. For instance, at the maximum ambient of 125˚C the LM2936Z can only dissipate 128 mW, limiting the input voltage to 7.34V for a 50 mA load, or 3.5 mA output current for a 40V input. The junction to ambient thermal resistance θJA rating has two distinct components: the junction to case thermal resistance rating θJC; and the case to ambient thermal resistance rating θCA. The relationship is defined as: θJA = θJC + θCA. For the SO-8 and TO-252 surface mount packages the θJA rating can be improved by using the copper mounting pads on the printed circuit board as a thermal conductive path to extract heat from the package. On the SO-8 package the four ground pins are thermally connected to the backside of the die. Adding approximately 0.04 square inches of 2 oz. copper pad area to these four pins will improve the θJA rating to approximately 110˚C/W. If this extra pad are is placed directly beneath the package there should not be any impact on board density. On the TO-252 package the ground tab is thermally connected to the backside of the die. Adding 1 square inch of 2 oz. copper pad area directly under the ground tab will improve the θJA rating to approximately 50˚C/W. While the LM2936 has an internally set thermal shutdown point of typically 150˚C, this is intended as a safety feature only. Continuous operation near the thermal shutdown temperature should be avoided as it may have a negative affect on the life of the device. While the LM2936 maintains regulation to 60V, it will not withstand a short circuit above 40V because of safe operating area limitations in the internal PNP pass device. Above 60V the LM2936 will break down with catastrophic effects on the regulator and possibly the load as well. Do not use this device in a design where the input operating voltage may exceed 40V, or where transients are likely to exceed 60V. Shutdown Pin The LM2936BM has a pin for shutting down the regulator output. Applying a Logic Level High ( > 2.0V) to the Shutdown pin will cause the output to turn off. Leaving the Shutdown pin open, connecting it to Ground, or applying a Logic Level Low ( < 0.6V) will allow the regulator output to turn on. www.national.com 6 Equivalent Schematic Diagram LM2936-5.0 7 00975905 www.national.com LM2936-5.0 Physical Dimensions unless otherwise noted inches (millimeters) 8-Lead Small Outline Molded Package (M) NS Package Number M08A TO-252 Package (DT) NS Package Number TD03B www.national.com 8 LM2936-5.0 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 3-Lead TO-92 Plastic Package (Z) NS Package Number Z03A SOT-223 Package (MP) NS Package Number MA04A 9 www.national.com LM2936-5.0 Ultra-Low Quiescent Current 5V Regulator Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 8-Lead Mini SOIC package (MM) NS Package Number MUA08A 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. 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