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LM78M05-MIL データシート(PDF) 9 Page - Texas Instruments |
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LM78M05-MIL データシート(HTML) 9 Page - Texas Instruments |
9 / 19 page 9 LM78M05-MIL www.ti.com SNVSAX6 – JUNE 2017 Product Folder Links: LM78M05-MIL Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated 7.3 Feature Description The LM78M05-MIL fixed voltage regulator has built-in thermal overload protection which prevents the device from being damaged due to excessive junction temperature. The regulator also contains internal short-circuit protection which limits the maximum output current, and safe- area protection for the pass transistor which reduces the short-circuit current as the voltage across the pass transistor is increased. Although the internal power dissipation is automatically limited, the maximum junction temperature of the device must be maintained below 125°C to meet data sheet specifications. An adequate heat sink must be provided to assure this limit is not exceeded under worst-case operating conditions (maximum input voltage and load current) if reliable performance is to be obtained. 7.4 Device Functional Modes 7.4.1 Normal Operation The device OUTPUT pin sources current necessary to make the voltage at the OUTPUT pin equal to the fixed voltage level of the device. 7.4.2 Operation With Low Input Voltage The device requires up to 2-V headroom (VIN – VOUT) to operate in regulation. With less headroom, the device may drop out of regulation in which the OUTPUT voltage would equal INPUT voltage minus dropout voltage. 7.4.3 Operation in Self Protection When an overload occurs, the device shuts down Darlington NPN output stage or reduce the output current to prevent device damage. The device automatically resets from the overload. The output may be reduced or alternate between on and off until the overload is removed. |
同様の部品番号 - LM78M05-MIL |
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同様の説明 - LM78M05-MIL |
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