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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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LM2937 bảng dữ liệu(PDF) 1 Page - National Semiconductor (TI) |
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LM2937 bảng dữ liệu(HTML) 1 Page - National Semiconductor (TI) |
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1 / 11 page  LM2937 500 mA Low Dropout Regulator General Description The LM2937 is a positive voltage regulator capable of sup- plying up to 500 mA of load current. The use of a PNP power transistor provides a low dropout voltage characteristic. With a load current of 500 mA the minimum input to output voltage differential required for the output to remain in regulation is typically 0.5V (1V guaranteed maximum over the full operat- ing temperature range). Special circuitry has been incorpo- rated to minimize the quiescent current to typically only 10 mA with a full 500 mA load current when the input to out- put voltage differential is greater than 3V. The LM2937 requires an output bypass capacitor for stabil- ity. As with most low dropout regulators, the ESR of this ca- pacitor remains a critical design parameter, but the LM2937 includes special compensation circuitry that relaxes ESR re- quirements. The LM2937 is stable for all ESR below 3 Ω. This allows the use of low ESR chip capacitors. Ideally suited for automotive applications, the LM2937 will protect itself and any load circuitry from reverse battery con- nections, two-battery jumps and up to +60V/−50V load dump transients. Familiar regulator features such as short circuit and thermal shutdown protection are also built in. Features n Fully specified for operation over −40˚C to +125˚C n Output current in excess of 500 mA n Output trimmed for 5% tolerance under all operating conditions n Typical dropout voltage of 0.5V at full rated load current n Wide output capacitor ESR range, up to 3 Ω n Internal short circuit and thermal overload protection n Reverse battery protection n 60V input transient protection n Mirror image insertion protection Connection Diagram and Ordering Information TO-220 Plastic Package DS011280-2 Front View Order Number LM2937ET-5.0, LM2937ET-8.0, LM2937ET-10, LM2937ET-12 or LM2937ET-15 See NS Package Number T03B SOT-223 Plastic Package DS011280-26 Front View Order Number LM2937IMP-5.0, LM2937IMP-8.0, LM2937IMP-10, LM2937IMP-12 or LM2937IMP-15 See NS Package Number MP04A TO-263 Surface-Mount Package DS011280-5 Top View DS011280-6 Side View Order Number LM2937ES-5.0, LM2937ES-8.0, LM2937ES-10, LM2937ES-12 or LM2937ES-15 See NS Package Number TS3B March 2000 © 2000 National Semiconductor Corporation DS011280 www.national.com |
Số phần tương tự - LM2937 |
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Mô tả tương tự - LM2937 |
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