The MIC5501/2/3/4 family of LDO regulators provides a high-performance 300mA solution in an ultra-small package, making it suitable for smartphones, medical devices, and portable electronics. Features include a low quiescent current of 38μA, a low dropout voltage of 160mV at 300mA, and an auto-discharge feature for quick power-down. The internal enable pull-down resistor on the MIC5503 and MIC5504 models simplifies circuit design and improves system reliability during processor boot-up. With an operating junction temperature range of -40°C to +125°C, these regulators are designed for demanding applications.