The MCP1801 is a family of CMOS low dropout (LDO) voltage regulators designed to deliver up to 150mA of current while maintaining a low quiescent current. Its wide input operating range and low dropout voltage make it ideal for battery-powered devices, such as pagers, cellular phones, and microcontroller power applications. The MCP1801 offers features like current limit protection, a shutdown pin for enabling/disabling the output, and high PSRR for noise reduction. It is available in a SOT-23-5 package and provides stable operation with ceramic output capacitors.