LM3480 100 mA, SOT-23, Quasi Low-Dropout Linear Voltage Regulator General Description Key Specifications The LM3480 is an integrated linear voltage regulator. It features operation from an input as high as 30V and a guaranteed maximum dropout of 1.2V at the full 100 mA load. Standard packaging for the LM3480 is the 3-lead SuperSOT ® package. The 5, 12, and 15V members of the LM3480 series are intended as tiny alternatives to industry standard LM78LXX series and similar devices. The 1.2V quasi low dropout of LM3480 series devices makes them a nice fit in many applications where the 2 to 2.5V dropout of LM78LXX series devices precludes their (LM78LXX series devices) use. The LM3480 series features a 3.3V member. The SOT packaging and quasi low dropout features of the LM3480 series converge in this device to provide a very nice, very tiny 3.3V, 100 mA bias supply that regulates directly off the system 5V ± 5% power supply. n 30V maximum input for operation n 1.2V guaranteed maximum dropout over full load and temperature ranges n 100 mA guaranteed minimum load current n ± 5% guaranteed output voltage tolerance over full load and temperature ranges n −40 to +125˚C junction temperature range for operation Features n 3.3, 5, 12, and 15V versions available n Packaged in the tiny 3-lead SuperSOT package Applications n n n n Tiny alternative to LM78LXX series and similar devices Tiny 5V ± 5% to 3.3V, 100 mA converter Post regulator for switching DC/DC converter Bias supply for analog circuits Typical Application Circuit DS100070-2 Connection Diagram DS100070-1 Top View SOT-23 Package 3-Lead, Molded-Plastic Small-Outline Transistor (SOT) Package Package Code MA03B (Note 1) SuperSOT ® is a registered trademark of National Semiconductor. © 1999 National Semiconductor Corporation DS100070 www.national.com LM3480 100 mA, SOT-23, Quasi Low-Dropout Linear Voltage Regulator June 1999 Ordering Information Output Voltage (V) Order Number (Note 2) Package Marking (Note 3) Comments 3.3 LM3480IM3-3.3 L0A 250 Units on Tape and Reel 3.3 LM3480IM3X-3.3 L0A 3k Units on Tape and Reel 5 LM3480IM3-5.0 L0B 250 Units on Tape and Reel 5 LM3480IM3X-5.0 L0B 3k Units on Tape and Reel 12 LM3480IM3-12 L0C 250 Units on Tape and Reel 12 LM3480IM3X-12 L0C 3k Units on Tape and Reel 15 LM3480IM3-15 L0D 250 Units on Tape and Reel 15 LM3480IM3X-15 L0D 3k Units on Tape and Reel www.national.com 2 Absolute Maximum Ratings (Note 4) ESD (Note 7) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Input Voltage (IN to GND) Operating Ratings (Note 4) Max. Input Voltage (IN to GND) 35V Power Dissipation (Note 5) 333mW Junction Temp. (Note 5) +150˚C Ambient Storage Temp. −65 to +150˚C Soldering Time, Temp. (Note 6) Wave Infrared Vapor Phase 4 sec., 260˚C 10 sec., 240˚C 75 sec., 219˚C 2kV 30V Junction Temp. (TJ) −40 to +125˚C Max. Power Dissipation (Note 8) 250mW Electrical Characteristics LM3480-3.3, LM3480-5.0 Typicals and limits appearing in normal type apply for TA = TJ = 25˚C. Limits appearing in boldface type apply over the entire junction temperature range for operation, −40 to +125˚C. (Notes 9, 10, 11) Nominal Output Voltage (VNOM) Symbol VOUT ∆VOUT ∆VOUT IGND VIN VOUT Parameter Output Voltage Line Regulation Load Regulation Ground Pin Current Dropout Voltage 3.3V Conditions Typical VIN = VNOM + 1.5V, 1 mA ≤ IOUT ≤ 100 mA 5.0V Limit 3.30 Typical 5.00 3.17 3.14 3.43 3.46 VNOM + 1.5V ≤ VIN ≤ 30V, IOUT = 1 mA VIN = VNOM + 1.5V, 10 mA ≤ IOUT ≤ 100 mA 10 20 2 0.7 Output Noise Voltage 0.9 VIN = 10V, Bandwidth: 10 Hz to 100 kHz 100 3 mV mV(max) 40 mV mV(max) 4 mA mA(max) 0.9 1.0 V V(max) V(max) 1.1 1.2 V V(max) V(max) 0.7 0.9 1.0 0.9 1.1 1.2 en 25 2 4 IOUT = 100 mA V V(min) V(min) V(max) V(max) 20 40 150 Units 4.80 4.75 5.20 5.25 12 25 VNOM + 1.5V ≤ VIN ≤ 30V, No Load IOUT = 10 mA Limit µVrms www.national.com LM3480-12, LM3480-15 Typicals and limits appearing in normal type apply for TA = TJ = 25˚C. Limits appearing in boldface type apply over the entire junction temperature range for operation, −40 to +125˚C. (Notes 9, 10, 11) Nominal Output Voltage (VNOM) Symbol VOUT ∆VOUT ∆VOUT IGND VIN VOUT Parameter Output Voltage Line Regulation Load Regulation Ground Pin Current Dropout Voltage 12V Conditions Typical VIN = VNOM + 1.5V, 1 mA ≤ IOUT ≤ 100 mA 15V Limit 12.00 Typical 15.00 11.52 11.40 12.48 12.60 VNOM + 1.5V ≤ VIN ≤ 30V, IOUT = 1 mA VIN = VNOM + 1.5V, 10 mA ≤ IOUT ≤ 100 mA 14 14.40 14.25 15.60 15.75 V V(min) V(min) V(max) V(max) 40 mV mV(max) 75 mV mV(max) 4 mA mA(max) 0.9 1.0 V V(max) V(max) 1.1 1.2 V V(max) V(max) 16 40 36 45 60 VNOM + 1.5V ≤ VIN ≤ 30V, No Load IOUT = 10 mA 2 2 4 0.7 0.7 0.9 1.0 IOUT = 100 mA 0.9 0.9 1.1 1.2 en Output Noise Voltage VIN = 10V, Bandwidth: 10 Hz to 100 kHz 360 Units Limit 450 µVrms Note 1: The package code MA03B is internal to National Semiconductor Corporation and indicates a specific version of the SOT-23 package and associated mechanical drawings. Note 2: The suffix “I” indicates the junction temperature range for operation is the industrial temperature range, −40 to +125˚C. The suffix “M3” indicates the die is packaged in the 3-lead SOT-23 package. The suffix “X” indicates the devices will be supplied in blocks of 3k units as opposed to blocks of 250 units. Note 3: Because the entire part number does not fit on the SOT-23 package, the SOT-23 package is marked with this code instead of the part number. Note 4: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the Electrical Characteristics tables. Note 5: The Absolute Maximum power dissipation depends on the ambient temperature and can be calculated using P = (TJ - TA)/θJA where TJ is the junction temperature, TA is the ambient temperature, and θJA is the junction-to-ambient thermal resistance. The 333 mW rating results from substituting the Absolute Maximum junction temperature, 150˚C, for TJ , 50˚C for TA, and 300˚C/W for θJA. More power can be safely dissipated at lower ambient temperatures. Less power can be safely dissipated at higher ambient temperatures. The Absolute Maximum power dissipation can be increased by 3.33 mW for each ˚C below 50˚C ambient. It must be derated by 3.33 mW for each ˚C above 50˚C ambient. A θJA of 300˚C/W represents the worst-case condition of no heat sinking of the 3-lead plastic SOT-23 package. Heat sinking enables the safe dissipation of more power. The LM3480 actively limits its junction temperature to about 150˚C. Note 6: Times shown are dwell times. Temperatures shown are dwell temperatures. For detailed information on soldering plastic small-outline packages, refer to the Packaging Databook available from National Semiconductor Corporation. Note 7: For testing purposes, ESD was applied using the human-body model, a 100 pF capacitor discharged through a 1.5 kΩ resistor. Note 8: As with the Absolute Maximum power dissipation, the maximum power dissipation for operation depends on the ambient temperature. The 250 mW rating appearing under Operating Ratings results from substituting the maximum junction temperature for operation, 125˚C, for TJ, 50˚C for TA, and 300˚C/W for θJA in P = (TJ - TA)/θJA. More power can be dissipated at lower ambient temperatures. Less power can be dissipated at higher ambient temperatures. The maximum power dissipation for operation appearing under Operating Ratings can be increased by 3.33 mW for each ˚C below 50˚C ambient. It must be derated by 3.33 mW for each ˚C above 50˚C ambient. A θJA of 300˚C/W represents the worst-case condition of no heat sinking of the 3-lead plastic SOT-23 package. Heat sinking enables the dissipation of more power during operation. Note 9: A typical is the center of characterization data taken with TA = TJ = 25˚C. Typicals are not guaranteed. Note 10: All limits are guaranteed. All electrical characteristics having room-temperature limits are tested during production with TA = TJ = 25˚C. All hot and cold limits are guaranteed by correlating the electrical characteristics to process and temperature variations and applying statistical process control. Note 11: All voltages except dropout are with respect to the voltage at the GND pin. www.national.com 4 Typical Performance Characteristics Unless indicated otherwise, VIN = VNOM + 1.5V, CIN = 0.1 µF, COUT = 0.1 µF, and TA . = 25˚C. Dropout Voltage vs Load Current Dropout Voltage vs Junction Temperature DS100070-19 Ground Pin Current vs Input Voltage DS100070-20 Ground Pin Current vs Input Voltage DS100070-9 Ground Pin Current vs Load Current DS100070-10 Ground Pin Current vs Junction Temperature DS100070-21 DS100070-22 5 www.national.com Typical Performance Characteristics Unless indicated otherwise, VIN = VNOM + 1.5V, CIN = 0.1 µF, COUT = 0.1 µF, and TA . = 25˚C. (Continued) Input Current vs Input Voltage Input Current vs Input Voltage DS100070-11 Line Transient Response DS100070-12 Line Transient Response DS100070-3 Load Transient Response DS100070-4 Load Transient Response DS100070-5 www.national.com DS100070-6 6 Typical Performance Characteristics Unless indicated otherwise, VIN = VNOM + 1.5V, CIN = 0.1 µF, COUT = 0.1 µF, and TA . = 25˚C. (Continued) Load Transient Response Load Transient Response DS100070-7 Output Voltage vs Input Voltage DS100070-8 Output Voltage vs Input Voltage DS100070-13 Output Voltage vs Input Voltage DS100070-14 Output Voltage vs Input Voltage DS100070-15 DS100070-16 7 www.national.com Typical Performance Characteristics Unless indicated otherwise, VIN = VNOM + 1.5V, CIN = 0.1 µF, COUT = 0.1 µF, and TA . = 25˚C. (Continued) Output ShortCircuit Current Output ShortCircuit Current DS100070-17 Power Supply Rejection Ratio DS100070-18 Power Supply Rejection Ratio DS100070-24 DS100070-25 DC Load Regulation DS100070-23 www.national.com 8 LM3480 100 mA, SOT-23, Quasi Low-Dropout Linear Voltage Regulator Physical Dimensions inches (millimeters) unless otherwise noted SOT-23 Package 3-Lead Small-Outline Package (M3) For Ordering, Refer to Ordering Information Table NS Package Number MA03B 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. 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