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LM2940IMPX-12 データシート(PDF) 1 Page - National Semiconductor (TI) |
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LM2940IMPX-12 データシート(HTML) 1 Page - National Semiconductor (TI) |
1 / 19 page LM2940/LM2940C 1A Low Dropout Regulator General Description The LM2940/LM2940C positive voltage regulator features the ability to source 1A of output current with a dropout voltage of typically 0.5V and a maximum of 1V over the entire temperature range. Furthermore, a quiescent current reduction circuit has been included which reduces the ground current when the differential between the input volt- age and the output voltage exceeds approximately 3V. The quiescent current with 1A of output current and an input- output differential of 5V is therefore only 30 mA. Higher quiescent currents only exist when the regulator is in the dropout mode (V IN −VOUT ≤ 3V). Designed also for vehicular applications, the LM2940/ LM2940C and all regulated circuitry are protected from re- verse battery installations or 2-battery jumps. During line transients, such as load dump when the input voltage can momentarily exceed the specified maximum operating volt- age, the regulator will automatically shut down to protect both the internal circuits and the load. The LM2940/ LM2940C cannot be harmed by temporary mirror-image in- sertion. Familiar regulator features such as short circuit and thermal overload protection are also provided. Features n Dropout voltage typically 0.5V @I O =1A n Output current in excess of 1A n Output voltage trimmed before assembly n Reverse battery protection n Internal short circuit current limit n Mirror image insertion protection n P + Product Enhancement tested Typical Application 00882203 *Required if regulator is located far from power supply filter. **COUT must be at least 22 µF to maintain stability. May be increased without bound to maintain regulation during transients. Locate as close as possible to the regulator. This capacitor must be rated over the same operating temperature range as the regulator and the ESR is critical; see curve. Ordering Information Temperature Range Output Voltage Package 5.0 8.0 9.0 10 12 15 0˚C ≤ TJ ≤ 125˚C LM2940CT-5.0 LM2940CT-9.0 LM2940CT-12 LM2940CT-15 TO-220 LM2940CS-5.0 LM2940CS-9.0 LM2940CS-12 LM2940CS-15 TO-263 −40˚C ≤ TJ ≤ 125˚C LM2940LD-5.0 LM2940LD-8.0 LM2940LD-9.0 LM2940LD-10 LM2940LD-12 LM2940LD-15 LLP 1k Units Tape and Reel LM2940LDX-5.0 LM2940LDX-8.0 LM2940LDX-9.0 LM2940LDX-10 LM2940LDX-12 LM2940LDX-15 LLP 4.5k Units Tape and Reel −40˚C ≤ TJ ≤ 125˚C LM2940T-5.0 LM2940T-8.0 LM2940T-9.0 LM2940T-10 LM2940T-12 TO-220 LM2940S-5.0 LM2940S-8.0 LM2940S-9.0 LM2940S-10 LM2940S-12 TO-263 −40˚C ≤ TJ ≤ 85˚C LM2940IMP-5.0 LM2940IMP-8.0 LM2940IMP-9.0 LM2940IMP-10 LM2940IMP-12 LM2940IMP-15 SOT-223 LM2940IMPX-5.0 LM2940IMPX-8.0 LM2940IMPX-9.0 LM2940IMPX-10 LM2940IMPX-12 LM2940IMPX-15 SOT-223 in Tape and Reel SOT-223 Package Marking L53B L54B L0EB L55B L56B L70B The physical size of the SOT-223 is too small to contain the full device part number. The package markings indicated are what will appear on the actual device. January 2003 © 2003 National Semiconductor Corporation DS008822 www.national.com |
同様の部品番号 - LM2940IMPX-12 |
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同様の説明 - LM2940IMPX-12 |
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