View cs8151.rev7 datasheet:

CS8151 5V, 100mA Low Dropout Linear Regulator with WATCHDOG, RESET, & WAKE UP Description Features 5V ±2% / 100 mA Output The CS8151 is a precision 5V, 100mA is received, a falling edge is issued on Voltage micro-power voltage regulator with the wake-up signal line. very low quiescent current (400µA Micropower Compatible RESET is independent of VIN and typical at 200µA load). The 5V output Control Functions: operates correctly to an output voltage is accurate within ±2% and supplies as low as 1V. A RESET signal is issued WAKE UP 100 mA of load current with a typical in any of three situations. During WATCHDOG dropout voltage of 400mV. power up the RESET is held low until RESET Microprocessor control logic includes the output voltage is in regulation. Low Dropout