The MIC5239 is a low quiescent current, µCap low-dropout regulator. With a maximum operating input voltage of 30V and a quiescent current of 23µA, it is ideal for supplying keep-alive power in systems with high voltage batteries. Capable of 500mA output, the MIC5239 has a dropout voltage of only 350mV. It can provide high output current for applications such as USB. As a µCap LDO, the MIC5239 is stable with either a ceramic or a tantalum output capacitor. It only requires a 3.3µF output capacitor for stability. The MIC5239 includes a logic compatible enable input and an undervoltage error flag indicator. Other features of the MIC5239 include thermal shutdown, current limit, overvoltage shutdown, reverse-leakage protection, and reversebattery protection. Available in the thermally enhanced SOIC-8, MSOP-8 and SOT-223, the MIC5239 comes in fixed 1.5V, 1.8V, 2.5V, 3.0V, 3.3V and 5.0V, and adjustable voltages.Ultra-low quiescent current (IQ = 23µA @IO = 100µA) Continuous 500mA output current Wide input range: 2.3V to 30V Low dropout voltage: 350mV @500mA ±1.0% initial output accuracy Stable with ceramic or tantalum output capacitor Logic compatible enable input Low output voltage error flag indicator Overcurrent protection Thermal shutdown Reverse-leakage protection Reverse-battery protection High-power SOIC-8, MSOP-8 and SOT-223 packages