ADP121-AUJZ28R7

The ADP121 is a quiescent current, low dropout, linear regulator that operates from 2.3 V to 5.5 V and provides up to 150 mA of output current. The low 135 mV dropout voltage at 150 mA load improves efficiency and allows operation over a wide input voltage range. The low 30 μA of quiescent current at full load makes the ADP121 ideal for battery-operated portable equipment. The ADP121 is available in output voltages ranging from 1.2 V to 3.3 V. The parts are optimized for stable operation with small 1 μF ceramic output capacitors. The ADP121 delivers good transient performance with minimal board area. Short-circuit protection and thermal overload protection circuits prevent damage in adverse conditions. The ADP121 is available in a tiny 5-lead TSOT and 4-ball 0.4 mm pitch halide-free WLCSP packages and utilizes the smallest footprint solution to meet a variety of portable applications.

Applications

• Mobile phones
• Digital cameras and audio devices
• Portable and battery-powered equipment
• Post dc-to-dc regulation
• Post regulation

Key features

• Input voltage range: 2.3 V to 5.5 V
• Output voltage range: 1.2 V to 3.3 V
• Output current: 150 mA
• Low quiescent current l_GND = 1 μA with 0 μA load, I_GND = 30 μA with 150 mA load
• Low shutdown current: < 1 μA
• Low dropout voltage 90 mV @ 150 mA load
• High PSRR 70 dB @ 1 kHz at V_OUT = 1.2 V, 70 dB @ 10 Hz at V_OUT = 1.2 V
• Low noise: 40 μV rms at V_OUT = 1.2 V
• No noise bypass capacitor required
• Output voltage accuracy: ±1%
• Stable with a small 1 μF ceramic output capacitor
• Current limit and thermal overload protection
• Logic controlled enable
• 5-lead TSOT package
• 4-ball 0.4 mm pitch WLCSP