The 300 mA， adjustable dual output ADP223/ADP225 and fixed dual output ADP222/ADP224 combine high PSRR， low noise， low quiescent current， and low dropout voltage in a voltage regulator that is ideally suited for wireless applications with demanding performance and board space requirements. The ADP222/ADP224 are available with fixed outputs voltages from 0.8V to 3.3V. The adjustable output ADP223/ADP225 may be set to output voltages from 0.5 V to 5.0 V. The low quiescent current， low dropout voltage， and wide input voltage range of the ADP222/ADP223/ADP224/ADP225 extend the battery life of portable devices. The ADP222/ADP223/ADP224/ADP225 maintain power supply rejection greater than 60 dB for frequencies as high as 100 kHz while operating with a low headroom voltage. The ADP222/ADP223/ADP224/ADP225 offer much lower noise performance than competing LDOs without the need for a noise bypass capacitor. Overcurrent and thermal protection circuitry prevent damage in adverse conditions. The ADP224 and ADP225 are identical to the ADP222 and ADP223， respectively， but with the addition of a quick output discharge （QOD） feature. The ADP222/ADP223/ADP224/ADP225 are available in a small 8-lead， 2 mm × 2 mm LFCSP package and are stable with tiny 1 μF， ±30% ceramic output capacitors， resulting in the smallest possible board area for a wide variety of portable power needs.