View ncp585 datasheet:

NCP585 Tri-Mode 300 mA CMOS LDO Regulator with Enable The NCP585 series of low dropout regulators are designed for portable battery powered applications which require precise output voltage accuracy, low quiescent current, and high ripple rejection. These devices feature an enable function which lowers current http://onsemi.com consumption significantly and are offered in the SOT23-5 and the HSON-6 packages, in fixed output voltages between 0.8 V and 3.3 V. MARKING This series of devices have three modes. Chip Enable (CE mode), DIAGRAMS Fast Transient Mode (FT mode), and Low Power Mode (LP mode). Both the FT and LP mode are utilized via the ECO pin. 5 Features 5 SOT23-5 XXXTT • Tri-mode Operation SN SUFFIX 1 CASE 1212 • Low Dropout Voltage: 1 Typ 550 mV at 300