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LM137HV データシート(PDF) 1 Page - National Semiconductor (TI) |
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LM137HV データシート(HTML) 1 Page - National Semiconductor (TI) |
1 / 10 page LM137HV/LM337HV 3-Terminal Adjustable Negative Regulators (High Voltage) General Description The LM137HV/LM337HV are adjustable 3-terminal negative voltage regulators capable of supplying in excess of −1.5A over an output voltage range of −1.2V to −47V. These regu- lators are exceptionally easy to apply, requiring only 2 exter- nal resistors to set the output voltage and 1 output capacitor for frequency compensation. The circuit design has been op- timized for excellent regulation and low thermal transients. Further, the LM137HV series features internal current limit- ing, thermal shutdown and safe-area compensation, making them virtually blowout-proof against overloads. The LM137HV/LM337HV serve a wide variety of applica- tions including local on-card regulation, programmable-output voltage regulation or precision current regulation. The LM137HV/LM337HV are ideal complements to the LM117HV/LM317HV adjustable positive regulators. Features n Output voltage adjustable from −1.2V to −47V n 1.5A output current guaranteed, −55˚C to +150˚C n Line regulation typically 0.01%/V n Load regulation typically 0.3% n Excellent thermal regulation, 0.002%/W n 77 dB ripple rejection n Excellent rejection of thermal transients n 50 ppm/˚C temperature coefficient n Temperature-independent current limit n Internal thermal overload protection n P + Product Enhancement tested n Standard 3-lead transistor package n Output short circuit protected Typical Applications Adjustable Negative Voltage Regulator DS009066-1 DS009066-25 †C1 = 1 µF solid tantalum or 10 µF aluminum electrolytic required for stability. Output capacitors in the range of 1 µF to 1000 µF of aluminum or tantalum electrolytic are commonly used to provide improved output impedance and rejection of transients. *C2 = 1 µF solid tantalum is required only if regulator is more than 4" from power-supply filter capacitor. May 1999 © 1999 National Semiconductor Corporation DS009066 www.national.com |
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