The MIC37100, MIC37101, and MIC37102 are 1A low dropout, linear voltage regulators that provide low voltage, high current output from an extremely small package. Utilizing Microchip’s proprietary Super βeta PNP pass element, the MIC37100/01/02 offers extremely low dropout (typically 280 mV at 1A) and low ground current (typically 11 mA at 1A). The MIC37100 is a fixed output regulator offered in the SOT-223 package. The MIC37101 and MIC37102 are fixed and adjustable regulators, respectively, in a thermally enhanced power 8-pin SOIC (small outline package). The MIC37102 is also available in the S-PAK power package, for applications that require higher power dissipation or higher operating ambient temperatures. The MIC37100/01/02 is ideal for PC add in cards that need to convert from standard 5V to 3.3V, 3.3V to 2.5V or 2.5V to 1.8V or lower. A guaranteed maximum dropout voltage of 500 mV over all operating conditions allows the MIC37100/01/02 to provide 2.5V from a supply as low as 3V and 1.8V from a supply as low as 2.3V. The MIC37100/01/02 is fully protected with overcurrent limiting and thermal shutdown. Fixed output voltages of 1.5V, 1.65V, 1.8V, 2.5V and 3.3V are available on MIC37100/01 with adjustable output voltages to 1.24V on MIC37102.