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LM137 データシート(PDF) 4 Page - Seme LAB |
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4 / 4 page Document Number 2831 Issue 3 IP137A SERIES IP137A SERIES IP337A SERIES IP337A SERIES LM137A SERIES LM137A SERIES Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612. E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use. Semelab encourages customers to verify that datasheets are current before placing orders. R3 1. 5k 1% AD J IP337A V IN V OU T R1 1k 1% R2 1 µF –VOUT SO LID TA NT A LUM 7V * –VIN * R2 = ( ) VOUT 9.08 x 10 -3 – 908 Ω C3 10 µF R2 AD J IP137A V IN V OU T 1N4 0 02 R1 120 Ω –VIN AD J IP137A VIN VOUT 1N4 0 02 2 µF C1 1 µF SO LID TANTA LUM –VOUT1 REG #1 2 µF REG #2 1 µF SO LID TA NTA LU M OUT2 –V AD J IP 137A V IN V OU T 1N4 0 02 2 µF REG #N 1 µF SO LID TA NTA LU M OUT N –V AD J IP3 37A VIN VOUT D2 1N 40 02 –VOUT IN –V R5* * 100 Ω 1% R3 5k 10 µF V IN V OU T AD J IP3 17A R1* * 100 Ω 1% 10 µF 2. 2 µF 2. 2 µF D1 1N 40 02 IN +V +V OUT R2 5k 1% R4 5k 1% AD J VIN VOUT (–) I (+) C1 1 µF SO LID TA NA TALU M IP 337A R S 0.8 Ω ≤ ≤ 250Ω RS I = 65 µA + 1.25 V RS Current Regulator Dual Tracking Supply APPLICATIONS INFORMATION High Stability Regulator The output stability, load regulation, line regulation, thermal regulation, temperature drift, long term drift, and noise, can be improved by a factor of 6.6 over the standard regulator configuration. This assumes a zener has 20PPM/°C maximum drift and about 10 times lower noise than the regulator. Multiple Tracking Regulators In the application shown below, regulator #2 to “N” will track regulator #1 to within ±24mV initially, and to ±60mV over all load, line, and temperature conditions. If any regulator output is shorted to ground, all other outputs will drop to -2V. Load regulation of regulators 2 to “N” will be improved by VOUT / 1.25V compared to a standard regulator, so regulator #1 should be the one which has the lowest load current. * Solid Tantalum ** R1 or R5 may be trimmed slightly to improve tracking. IG–Pack Part G–Pack K–Pack R–Pack T–Pack Temp. Number (TO257) SMD1 SMD05 LCC4 (TO3) (TO66) (TO220) Range LM137 -55 to +150°C LM137HV ” LM137A ” LM137AHV ” IP137 “ IP137HV ” IP137A ” IP137AHV ” LM337 0 to 125°C LM337HV ” IP337 ” IP337HV ” IP337A ” IP337AHV ” Order Information |
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