 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| DATA SHEET LND2931 100mA Low Dropout Voltage Regulator GENERAL DESCRIPTION This series of fixed-voltage and adjustable monolithic micropower voltage regulators is designed for a wide range of applications. This device is an excellent choice for use in batterypowered application. Furthermore, the quiescent current increases only slightly at dropout, which prolongs battery life. This series of fixed-voltage ( Typ. 60mV at light load and 300mV at 100mV) 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 fixedvoltage and adjustable regulators is offered in 3pin TO-92 package (TO-220-5, SO-8 for LND2931) compatible with other fixed-voltage regulators. FEATURES * * * * * * * * * 3- terminal regulators ( To-220-5, SO-8 for LND2931) 100mA output within 2% over temperature Very low quiescent current Low dropout voltage (300mV 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 National LM2931 fixed series, but has lower ground current, higher accuracy of output voltage and extremely tight load and line regulation. For adjust model LND2931 see typical applications on figure 2. PIN CONFIGURATION APPLICATIONS * * * * * * * High-efficiency linear regulators Battery powered systems Portable/Palm top/ Notebook Computers Portable consumer equipment Portable instrumentation Automotive Electronics SMPS Post Regulator Output GND GND Feedback 1 2 LND2931 8 7 6 5 Input GND GND Shutdown 3 4 * Linear Dimensions, Inc. * 445 East Ohio Street, Chicago IL 60611 USA * tel 312.321.1810 * fax 312.321.1830 * www.lineardimensions.com * LND2931 ABSOLUTE MAXIMUM RATINGS Power Dissipation Lead Temperature(Soldering, 5 seconds) Storage Temperature Range Operating Junction Temperature Range Input Supply Voltage Internally Limited 260C -65C to +150C -55C to +150C -20V to +35V DEVICE SELECTION GUIDE Vout , VOLTS 3.3V* 5.0V 8.0V 8.5V 9.0V 10.0V 12.0V 15.0V 3.0v to 24V Device LND2931-3.3 LND2931-5.0 LND2931-8.0 LND2931-8.5 LND2931-9.0 LND2931-10 LND2931-12 LND2931-15 LND2931 * Other fixed versions are also available, VOUT =2.0V to 5.0V. Please consult for more information. OUTPUT OUTPUT GND INPUT GND INPUT TO-220 (Top View) TO-92 (Bottom View) * Linear Dimensions, Inc. * 445 East Ohio Street, Chicago IL 60611 USA * tel 312.321.1810 * fax 312.321.1830 * www.lineardimensions.com * LND2931 ELECTRICAL CHARACTERISTICS (TJ =25C, IO =100A, VIN =14V (for 2931-15, VIN =16V), CO =100F; unless otherwise noted) PARAMETER Output Voltage (Fixed Model) Output Voltage (Fixed Model) 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(Note6) Output Noise, 10Hz to 100KHz IL = 100mA Ripple Rejection Ratio CONDITIONS -25 CTJ 85C Full Operating Temperature 100AIL 100mA, TJTjmax MIN 0.985 |VO| 0.98 |VO| 0.975 |VO| TYP VO VO MAX 1.015|VO| 1.02 |VO| 1.025 |VO| 26 (Note 1) 13V Vin 26V (Note 3) 1mA IL 100mA IL =10mA IL =100mA IL =100A IL =10mA IL =100mA Vin=Vout -0.5V , IL =100A Vout=0 CL=2.2F CL=3.3F CL=33F IO =10mA,f=120Hz,Co=100F, Vin=Vo+3V+2Vpp 60 50 0.1 0.1 60 300 100 0.9 8 110 160 0.05 500 350 120 150 0.4 0.3 200 600 150 1.5 12 170 200 0.2 ppm/C % % mV A mA mA A mA %/W V RMS V UNITS dB TO-220-5, SO-8 Versions Only Reference Voltage Reference Voltage Over Temperature (note 7) Feedback Pin Bias Current Reference Voltage (Note 1) Temperature Coefficient Feedback Pin Bias Current Temperature Coefficient Shutdown Input Low(Regulator ON) Input Logic Voltage High (Regulator OFF) VS = 2.4V Shutdown Pin Input Current 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 1.21 1.185 1.235 20 50 0.1 1.3 1.26 1.285 40 V nA ppm/C nA/C 0.7 50 600 10 20 30 2 30 450 V A * Linear Dimensions, Inc. * 445 East Ohio Street, Chicago IL 60611 USA * tel 312.321.1810 * fax 312.321.1830 * www.lineardimensions.com * LND2931 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 = 1mA, for IL=100A and TJ =125C, line regulation is guaranteed by design to 0.2%. For LND2931-15 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: Ground 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 output voltage at a time T after a change in power dissipation, excluding load or line regulation effects. Specifications are for a 50mA load pulse (1.25W pulse) for T=10ms. Note7: Vref Vout (Vin-1V), 2.3VVin 26V, 100A IL 100mA, TJ Tjmax. Note 8: Vshutdown 2V, VIN 26V, Vout =0V. BLOCK DIAGRAM AND TYPICAL APPLICATIONS Figure 1: Fixed Regulator Unregulated DC + INPUT OUTPUT 5V I <= 100mA L + ERROR AMPLIFIER 60k + See Application Hints 182k + 1.23 V Reference GROUND Figure 2:Adjustable Regulator Unregulated DC 7 + FEEDBACK INPUT 8 1 OUTPUT R1 0.01F Vout 1.2A->24A I <= 100mA L + From CMOS or TTL 5 SHUTDOWN ERROR AMPLIFIER + R2 3.3 F 60k + 1.23 V Reference 2,3,6,7 GROUND * Linear Dimensions, Inc. * 445 East Ohio Street, Chicago IL 60611 USA * tel 312.321.1810 * fax 312.321.1830 * www.lineardimensions.com * LND2931 TYPICAL APPLICATIONS +V IN 8 ERROR OUTPUT 5 ERROR +V IN V OUT 1 *V OUT V IN 5V BUS +V IN V LND2931 OUT *V OUT 5V F + 1 LND2931 SHUTDOWN 3 INPUT GND 4 FB 7 GND *Minimum input-output voltage ranges from 40mV to 400mV, depending on load current. Current limit is typically 160mA. *Minimum input-output voltage ranges from 40mV to 400mV, depending on load current. Current limit is typically 160mA. Wide Input Voltage Range Current Limiter 5V Current Limiter +V=1.2 I L +V IN 8 470k 8 5 470k ERROR +V IN V OUT 1 V OUT + 1 F R1 FB 7 GND 4 V IN LOAD 30V I = 1.23/R L 1 V OUT *V OUT LND2931 SHUTDOWN 3 SD INPUT GND 4 FB 7 R 1% + 1 F 1 F LND2931 3 SD RESET R2 Latch Off When Error Flag Occurs Low Drift Current Source * Linear Dimensions, Inc. * 445 East Ohio Street, Chicago IL 60611 USA * tel 312.321.1810 * fax 312.321.1830 * www.lineardimensions.com * |
Price & Availability of LND2931-50
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |