The MIC39300 and MIC39301 are 3.0A low-dropout linear voltage regulators that provide a low voltage, high-current output with a minimum of external components. Utilizing Micrel's proprietary Super eta PNPTM pass element, the MIC39300/1 offers extremely low dropout (typically 400mV at 3.0A) and low ground current (typically 36mA at 3.0A). The MIC39300/1 is ideal for PC add-in cards that need to convert from standard 5V or 3.3V down to new, lower core voltages. A guaranteed maximum dropout voltage of 500mV over all operating conditions allows the MIC39300/1 to provide 2.5V from a supply as low as 3V. The MIC39300/1 also has fast transient response for heavy switching applications. The device requires only 47F of output capacitance to maintain stability and achieve fast transient response The MIC39300/1 is fully protected with overcurrent limiting, thermal shutdown, reversed-battery protection, reversedleakage protection, and reversed-lead insertion. The MIC39301 offers a TTL-logic compatible enable pin and an error flag that indicates under voltage and over current conditions. Offered in fixed voltages, the MIC39300/1 comes in the TO-220 and TO-263 packages and is an ideal upgrade to older, NPN-based linear voltage regulators.