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LM137K Arkusz danych(PDF) 1 Page - STMicroelectronics |
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LM137K Arkusz danych(HTML) 1 Page - STMicroelectronics |
1 / 14 page LM137/LM237 LM337 March 1993 NEGATIVE VOLTAGE REGULATORS THREE-TERMINAL ADJUSTABLE . OUTPUT VOLTAGE ADJUSTABLE DOWN TO Vref . 1.5A GUARANTEED OUTPUT CURRENT . 0.3%/V TYPICAL LOAD REGULATION . 0.01%/V TYPICAL LINE REGULATION . CURRENT LIMIT CONSTANT WITH TEM- PERATURE . RIPPLE REJECTION : 77dB . STANDARD 3-LEAD TRANSISTOR PACK- AGES . EXCELLENT THERMAL REGULATION: 0.002%/V . 50ppm/ °C TEMPERATURE COEFFICIENT DESCRIPTION The LM137 series are adjustable 3-terminal nega- tive voltage regulators capable of supplying in ex- cess - 1.5A over a - 1.2 to - 37V output voltage range. They are exceptionally easy to use and require only two external resistors to set the output voltage. Fur- ther, both line and load regulation are better than standard fixed regulators. Also, LM137 regulators are supplied in standard transistor packages which are easily mounted and handled. In addition to higher performance than fixed regulators, the LM137 series offer full overload protection available only in integrated circuits. Included on the chip are current limit, thermal overload protection and safe area protection. All overload protection circuitry re- mains fully functional even if the adjustment terminal is disconnected. TO-3 PIN CONNECTIONS 1 - Output 2 - Adj Case is input 1 - Adj 2 - Output 3 - Input Heatsink surface connected to input TO-220 TO-3 (bottom view) TO-39 (bottom view) TO-220 (front view) 1 - Adj 2 - Output 3 - input TO-39 1/14 |
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Podobny opis - LM137K |
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