The LM2937 is a positive voltage regulator capable of supplyingup to 500 mA of load current. The use of a PNP powertransistor provides a low dropout voltage characteristic. Witha load current of 500 mAthe minimum input to output voltagedifferential required for the output to remain in regulation istypically 0.5V (1V guaranteed maximum over the full operatingtemperature range). Special circuitry has been incorporatedto minimize the quiescent current to typically only10 mA with a full 500 mA load current when the input tooutput voltage differential is greater than 3V.