驱动电路芯片lm2940

　　1 Features 3 Description 1 The LM2940-N and LM2940C positive voltage • Input Voltage Range = 6 V to 26 V regulators feature the ability to source 1 A of output • Dropout Voltage Typically 0.5 V at IOUT = 1 A current with a dropout voltage of typically 0.5 V and a • Output Current in Excess of 1 A maximum of 1 V over the entire temperature range. • Output Voltage Trimmed Before Assembly Furthermore， a quiescent current reduction circuit has been included which reduces the ground current • Reverse Battery Protection when the differential between the input voltage and • Internal Short Circuit Current Limit the output voltage exceeds approximately 3 V. The • Mirror Image Insertion Protection quiescent current with 1 A of output current and an input-output differential of 5 V is therefore only 30 • P + Product Enhancement Tested mA. Higher quiescent currents only exist when the regulator is in the dropout mode （VIN − VOUT ≤ 3 V）。

　　2 Applications Designed also for vehicular applications， the LM2940- • Post Regulator for Switching Supplies N and LM2940C and all regulated circuitry are • Logic Power Supplies protected from reverse battery installations or 2- • Industrial Instrumentation battery jumps. During line transients， such as load dump when the input voltage can momentarily space exceed the specified maximum operating voltage， the space regulator will automatically shut down to protect both space the internal circuits and the load. The LM2940-N and LM2940C cannot be harmed by temporary mirrorimage insertion. Familiar regulator features such as short circuit and thermal overload protection are also provided