LM3490 100 mA, SOT-23, Quasi Low-Dropout Linear Voltage Regulator with Logic-Controlled ON/OFF General Description Key Specifications The LM3490 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 LM3490 is the 5-lead SOT-23 package. A logic-controlled ON/OFF feature makes the LM3490 ideal for powering subsystems ON and OFF as needed. The 5, 12, and 15V members of the LM3490 series are intended as tiny alternatives to industry standard LM78LXX series and similar devices. The 1.2V quasi low dropout of LM3490 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 LM3490 series features a 3.3V member. The SOT packaging and quasi low dropout features of the LM3490 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. ■ 30V maximum input for operation ■ 1.2V guaranteed maximum dropout over full load and temperature ranges ■ 100 mA guaranteed load current ■ ±5% guaranteed output voltage tolerance over full load and temperature ranges ■ −40 to +125°C junction temperature range for operation Features ■ 3.3, 5, 12, and 15V versions available ■ Logic-controlled ON/OFF ■ Packaged in the tiny 5-lead SOT-23 package Applications ■ ■ ■ ■ 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 10007102 Connection Diagram 10007101 Top View SOT-23 Package 5-Lead, Molded-Plastic Small-Outline Transistor (SOT) Package Package Code MF05A(Note 1) © 2007 National Semiconductor Corporation 100071 www.national.com LM3490 100 mA, SOT-23, Quasi Low-Dropout Linear Voltage Regulator with Logic-Controlled ON/OFF June 2007 LM3490 Ordering Information Output Voltage (V) 3.3 5.0 12 15 www.national.com Order Number (Note 2) Package Marking (Note 3) Comments LM3490IM5-3.3 L78B 1000 Units on Tape and Reel LM3490IM5X-3.3 L78B 3000 Units on Tape and Reel LM3490IM5-5.0 L79B 1000 Units on Tape and Reel LM3490IM5X-5.0 L79B 3000 Units on Tape and Reel LM3490IM5-12 L80B 1000 Units on Tape and Reel LM3490IM5X-12 L80B 3000 Units on Tape and Reel LM3490IM5-15 L81B 1000 Units on Tape and Reel LM3490IM5X-15 L81B 3000 Units on Tape and Reel 2 If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Input Voltage (IN to GND) Voltage ON/OFF to GND Power Dissipation (Note 5) Junction Temp. (TJ) (Note 5) Ambient Storage Temp. 35V 5.5V 400 mW +150°C −65 to +150°C Operating Ratings 4sec., 260°C 10sec., 240°C 75sec., 219°C 1.0kV 2.0kV (Note 4) Maximum Input Voltage (IN to GND) Voltage ON/OFF to GND Junction Temperature (TJ) Maximum Power Dissipation (Note 8) 30V 0 to 5V −40 to +125°C 300 mW Electrical Characteristics LM3490-3.3, LM3490-5.0 VIN = VNOM + 1.5V unless otherwise noted. 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 ΔVOUT ΔVOUT IGND Parameter Output Voltage Line Regulation Load Regulation Ground Pin Current 3.3V Conditions Typical 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 7 10 mA ≤ IOUT ≤ 100 mA 15 VNOM + 1.5V ≤ VIN ≤ 30V, No Load VON/OFF = 5V 2 0.1 IOUT = 10 mA 0.7 0.9 mV mV(max) mA 4 mA(max) 5 µA µA(max) 0.9 1.0 0.9 1.1 1.2 VIN = 10V, Bandwidth: 10 Hz to 100 kHz 40 0.7 0.9 1.0 IOUT = 100 mA mV mV(max) 0.1 5 Dropout Voltage 25 2 4 VIN VOUT V V(min) V(min) V(max) V(max) 15 40 1.1 1.2 Output Noise Voltage VIL Maximum Low Level Input Voltage at ON/ OFF 0.2 0.2 V(max) VIH Minimum High Level Input Voltage at ON/ OFF 2.0 2.0 V(min) −1 µA(max) 20 µA µA(max) VON/OFF = 0V IIH VON/OFF = 5V 150 V V(max) V(max) V V(max) V(max) en IIL 100 Units 4.80 4.75 5.20 5.25 9 25 VON/OFF = 0V Limit −1 1 1 20 3 µVrms www.national.com LM3490 Soldering Time, Temp. (Note 6) Wave Infrared Vapor Phase ESD (Note 7) ON/OFF All Other Pins Absolute Maximum Ratings (Note 4) LM3490 LM3490-12, LM3490-15 VIN = VNOM + 1.5V unless otherwise noted. 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 12V Parameter Conditions Output Voltage 1 mA ≤ IOUT ≤ 100 mA Typical 12.00 Typical Line Regulation VNOM + 1.5V ≤ VIN ≤ 30V, IOUT = 1 mA 14 ΔVOUT Load Regulation 10 mA ≤ IOUT ≤ 100 mA 36 Limit 15.00 11.52 11.40 12.48 12.60 ΔVOUT IGND 15V Limit 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(max) 5 µA µA(max) 16 40 45 60 Ground Pin Current VNOM + 1.5V ≤ VIN ≤ 30V, No Load VON/OFF = 5V 2 2 4 VON/OFF = 0V 0.1 Dropout Voltage IOUT = 10 mA 0.7 0.7 0.9 1.0 IOUT = 100 mA 0.9 0.9 1.0 0.9 1.1 1.2 VIN = 10V, Bandwidth: 10 Hz to 100 kHz mA 0.1 5 VIN VOUT Units en Output Noise Voltage VIL Maximum Low Level Input Voltage at ON/OFF 0.2 0.2 V(max) VIH Minimum High Level Input Voltage at ON/OFF 2.0 2.0 V(min) −1 −1 µA(max) 20 µA µA(max) IIL VON/OFF = 0V IIH VON/OFF = 5V 360 1.1 1.2 450 V V(max) V(max) V V(max) V(max) 1 µVrms 1 20 Note 1: The package code MA05B 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 “M5” indicates the die is packaged in the 5-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 400 mW rating results from substituting the Absolute Maximum junction temperature, 150°C, for TJ , 50°C for TA, and 250°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 4 mW for each °C below 50°C ambient. It must be derated by 4 mW for each °C above 50°C ambient. A θJA of 250°C/W represents the worst-case condition of no heat sinking of the 5-lead plastic SOT-23 package. Heat sinking enables the safe dissipation of more power. The LM3490 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 300 mW rating appearing under Operating Ratings results from substituting the maximum junction temperature for operation, 125°C, for TJ, 50°C for TA, and 250°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 4 mW for each °C below 50°C ambient. It must be derated by 4 mW for www.national.com 4 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. 5 www.national.com LM3490 each °C above 50°C ambient. A θJA of 250°C/W represents the worst-case condition of no heat sinking of the 5-lead plastic SOT-23 package. Heat sinking enables the dissipation of more power during operation. LM3490 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 10007120 10007119 Ground Pin Current vs Input Voltage Ground Pin Current vs Input Voltage 10007109 10007110 Ground Pin Current vs Junction Temperature Ground Pin Current vs Load Current 10007121 www.national.com 10007122 6 LM3490 Input Current vs Input Voltage Input Current vs Input Voltage 10007111 10007112 Line Transient Response Line Transient Response 10007103 10007104 Load Transient Response Load Transient Response 10007105 10007106 7 www.national.com LM3490 Load Transient Response Load Transient Response 10007107 10007108 Output Voltage vs Input Voltage Output Voltage vs Input Voltage 10007113 10007114 Output Voltage vs Input Voltage Output Voltage vs Input Voltage 10007115 www.national.com 10007116 8 LM3490 Output ShortCircuit Current Output ShortCircuit Current 10007117 10007118 Power Supply Rejection Ratio Power Supply Rejection Ratio 10007124 10007125 DC Load Regulation 10007123 9 www.national.com LM3490 ON/OFF pin voltage to a value between the VIL threshold and Ground potential will disable the output voltage. Although the ON/OFF threshold is typically 725mV, and has no hysteresis, the ON/OFF signal must rise and fall, cleanly and promptly, from voltage levels that are below the VIL threshold and above the VIH threshold. The ON/OFF pin has no internal pull-up or pull-down to establish a default condition and, as a result, this pin must be terminated, either actively or passively, to an appropriate voltage level. Applications Information ON/OFF Pin The LM3490 features a logic controlled ON/OFF pin that will allow the output voltage to be disabled, or enabled, as needed. The defined operating voltage range for this pin is 0.0V to 5.0V. The ON/OFF pin can not be left floating, as the output status cannot be guaranteed. Additionally, the ON/OFF pin should not be biased below ground potential as unpredictable device behavior may occur. Pulling the ON/OFF pin voltage to a value between the VIH threshold and 5.0V will enable the output voltage. Pulling the www.national.com 10 LM3490 Physical Dimensions inches (millimeters) unless otherwise noted SOT-23 Package 5-Lead Small-Outline Package (M5) For Ordering, Refer to Ordering Information Table NS Package Number MF05A 11 www.national.com LM3490 100 mA, SOT-23, Quasi Low-Dropout Linear Voltage Regulator with Logic-Controlled ON/OFF Notes THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. NATIONAL MAKES NO REPRESENTATIONS OR WARRANTIES WITH RESPECT TO THE ACCURACY OR COMPLETENESS OF THE CONTENTS OF THIS PUBLICATION AND RESERVES THE RIGHT TO MAKE CHANGES TO SPECIFICATIONS AND PRODUCT DESCRIPTIONS AT ANY TIME WITHOUT NOTICE. NO LICENSE, WHETHER EXPRESS, IMPLIED, ARISING BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS DOCUMENT. TESTING AND OTHER QUALITY CONTROLS ARE USED TO THE EXTENT NATIONAL DEEMS NECESSARY TO SUPPORT NATIONAL’S PRODUCT WARRANTY. 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