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| DATA SHEET LND48XX 400mA Low Dropout Voltage Regulators GENERAL DESCRIPTION This series of fixed-voltage monolithic micropower voltage regulators is designed for a wide range of applications. This device is an excellent choice for use in battery-powered application. Furthermore, the quiescent current increases only slightly at dropout, which prolongs battery life. This series of fixed-voltage regulators features very low quiescent current(100mA Typ.) and very low drop output voltage (Typ. 60mV at light load and 420mV at 400mA). This includes a tight initial tolerance of 0.5%typ. Extremely good load and line regulation of 0.05% typ., and very low output temperature coefficient. This series of fixed-voltage regulators is offered in 3-pin TO220 package compatible with other fixed voltage regulators. Adjust model is offered in 5-pin TO220 package and fixed model with shutdown input is offered in 4-pin TO-220 package. FEATURES * * * * * * * * 400mA output within 2% over temperature Very low quiescent current Low dropout voltage (420mV Typ) Extremely tight load and line regulation Very low temperature coefficient Current and thermal limiting Unregulated DC input can withstand - 20V reverse battery and +60V positive transients Direct replacement for SGS-ThomsonL48XX Series, but has lower ground current, higher accuracy of output voltage and extremely tight load and line regulation. The 5 pin version (adjust model) and 4 pin version (fixed model) have a shutdown input. APPLICATIONS * * * High-efficiency linear regulator Battery powered systems Portable/palm top/ notebook Computers Portable consumer equipment Portable instrumentation Automotive Electronics SMPS Post Regulator PIN DIAGRAM Output Common Input * * * * TO - 220 Package * Linear Dimensions, Inc. * 445 East Ohio Street, Chicago IL 60611 USA * tel 312.321.1810 * fax 312.321.1830 * www.lineardimensions.com * LND48XX ABSOLUTE MAXIMUM RATINGS Power Dissipation Lead Temperature(Soldering, 5 seconds) Storage Temperature Range Operating Junction Temperature Range Input Supply Voltage Continuous total dissipation at 25 C free air temperature Continuous total dissipation at (or below) 25 C case temperature Internally Limited 260C -65C to +150C -55C to +150C -20V to +35V 2W 15W DEVICE SELECTION GUIDE Vout , VOLTS 3.3V* 5V 8V 8.5V 9V 10V 12V 15V Adj. Device LND4833 LND4805 LND4808 LND4885 LND4809 LND4810 LND4812 LND4815 LND48-adj * Other fixed versions are also available Vout=2.0 V to 5.0V Please Consult Linear Dimensions for Information. * Linear Dimensions, Inc. * 445 East Ohio Street, Chicago IL 60611 USA * tel 312.321.1810 * fax 312.321.1830 * www.lineardimensions.com * LND48XX ELECTRICAL CHARACTERISTICS PARAMETER Output Voltage Output Voltage Input Supply Voltage Output Voltage Temperature Coefficient Line Regulation (Note 2) Load Regulation(Note 2) Dropout Voltage(Note 4) Ground Current (Note 5) Dropout Ground Current(Note 5) Current Limit Thermal Regulation (Note 6) Output Noise, 10Hz to 100KHz IL = 100mA Ripple Rejection Ratio Adjust model Reference Voltage Reference Voltage Feedback Pin Bias Current Reference Voltage Temperature Coefficient Feedback Pin Bias Current Temperature coefficient Shutdown Input Input Logic Voltage Shutdown Pin Input Current CONDITIONS -25 C<=TJ <=85C Full Operating Temperature 1mA<= IL <=400mA, TJ <=Tjmax (Note 1) 13V<=Vin <= 26V (Note 3) 1mA<= IL <=400mA IL =150mA IL =400mA IL =100A IL =150A IL =400A Vin=Vout-0.5V IL =100A Vout=0 CL=2.2F CL=3.3F CL=33F IO =350mA,f=120Hz, Co=100F, VIN=Vo+3V+2VPP MIN 0.985 |Vo| 0.98 |Vo| 0.975 |Vo| TYP Vo Vo MAX 1.015 |Vo| 1.02 |Vo| 1.025 |Vo| 26 50 0.1 0.1 200 420 100 12 30 110 350 0.05 500 350 120 60 1.21 1.185 1.235 20 (Note 1) 50 0.1 Low(Regulator ON) High (Regulator OFF) VS = 2.4V VS = 26V (Note 8) Regulator Output Current in Shutdown 5.0V<=Vout<15.0V 3.3V<=Vout<5.0 V 2.0V<=Vout<3.3V 10 20 30 A 1.3 2 30 450 50 600 0.7 1.26 1.285 40 150 0.4 0.3 400 700 200 20 50 220 500 0.2 ppm/C % % mV A mA mA A mA %/W V RMS dB V UNITS Over Temperature (Note 7) V nA ppm/C nA/C V * Linear Dimensions, Inc. * 445 East Ohio Street, Chicago IL 60611 USA * tel 312.321.1810 * fax 312.321.1830 * www.lineardimensions.com * LND48XX Note 1: Output or reference voltage temperature coefficients defined as the worst case voltage change divided by the total temperature range. Note 2: Regulations are measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specification for thermal regulation. Note 3: Line regulation is tested at 150C for IL =5mA. For IL =100A and TJ =125C, line regulation is guaranteed by design to 0.2%. For LND4815 16V<= Vin <=26V. Note 4: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. Note 5: Group pin current is the regulator quiescent current. The total current drawn from the source is the sum of the ground pin current and output load current. Note 6: Thermal Regulation is the change in the output voltage at a time T after a change in power dissipation, excluding load or line regulation effects. Specifications are for a 200mA load pulse (3W pulse) for T=10ms. Note 7: Vref <=Vout <=(Vin - 1V), 2.3V<=Vin <=26V,100A <= IL <=400mA, TJ <= Tjmax. Note 8: Vshutdown >=2V, Vin <=26V, Vout =0v. BLOCK DIAGRAM and TYPICAL APPLICATIONS Unregulated DC + INPUT OUTPUT 5V <= 400mA + ERROR AMPLIFIER 1F + + 6.8F + 1.23 V Reference GROUND Fig 1 : Fixed Regulator Unregulated DC 7 + FEEDBACK INPUT 8 1 OUTPUT R1 1 F Vout 1.2 --> 24 V 400mA Max + 6.8F + From CMOS or TTL Off On R2 ERROR AMPLIFIER V Ref 1.23V 3 SHUTDOWN + 1.23 V Reference GROUND V =V (1+ R1/R2) OUT REF Fig 2 : Adjustable Regulator * Linear Dimensions, Inc. * 445 East Ohio Street, Chicago IL 60611 USA * tel 312.321.1810 * fax 312.321.1830 * www.lineardimensions.com * |
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