**General Description** The MIC5205 is an efficient linear voltage regulator with ultra low-noise output, very low dropout voltage (typically 17mV at light loads and 165mV at 150mA), and very low ground current (600⎧A at 100mA output). The MIC5205 offers better than 1% initial accuracy. Designed especially for hand-held, battery-powered devices, the MIC5205 includes a CMOS or TTL compatible enable/shutdown control input. When shut down, power consumption drops nearly to zero. Regulator ground current increases only slightly in dropout, further prolonging battery life. **Features** • Ultra-low-noise output • High output voltage accuracy • Guaranteed 150mA output • Low quiescent current • Low dropout voltage • Extremely tight load and line regulation • Very low temperature coefficient • Current and thermal limiting • Reverse-battery protection • “Zero” off-mode current • Logic-controlled electronic enable