No noise bypass capacitor required Stable with 1 μF ceramic input and output capacitors Maximum output current: 200 mA Input voltage range: 2.2 V to 5.5 V Low quiescent current IGND = 10 μA with 0 load IGND = 265 μA with 200 mA load Low shutdown current: <1 μA Low dropout voltage: 140 mV at 200 mA load Initial accuracy: ±1% Accuracy over line, load, and temperature: ±2.5% 16 fixed output voltage options: 1.1 V to 3.3 V PSRR performance of 70 dB at 10 kHz Current limit and thermal overload protection Logic controlled enable Internal pull-down resistor on EN input 5-lead TSOT package 4-ball, 0.4mm pitch WLCSP APPLICATIONS RF, VCO, and PLL power supplies Mobile phones Digital camera and audio devices Portable and battery-powered equipment Post dc-to-dc regulation Portable medical devices GENERAL DESCRIPTION The ADP151 is an ultralow noise, low dropout, linear regulator that operates from 2.2 V to 5.5 V and provides up to 200 mA of output current. The low 140 mV dropout voltage at 200 mA load improves efficiency and allows operation over a wide input voltage range. Using an innovative circuit topology, the ADP151 achieves ultralow noise performance without the necessity of a bypass capacitor, making it ideal for noise-sensitive analog and RF applications. The ADP151 also achieves ultralow noise performance without compromising PSRR or transient line and load performance. The low 265 μA of quiescent current at 200 mA load makes the ADP151 suitable for battery-operated portable equipment. The ADP151 also includes an internal pull-down resistor on the EN input
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