ADP161 Datasheet

• Ultralow quiescent current
  I_Q = 560 nA with 0 μA load
  I_Q = 860 nA with 1 μA load
• Stable with 1 μF ceramic input and output capacitors
• Maximum output current: 150 mA
• Input voltage range: 2.2 V to 5.5 V
• Low shutdown current: <50 nA typical
• Low dropout voltage: 195 mV at 150 mA load
• Initial accuracy: ±1%
• Accuracy over line, load, and temperature: ±3.5%
• 15 fixed output voltage options: 1.2 V to 4.2 V
• Adjustable output available
• PSRR performance of 72 dB at 100 Hz
• Current limit and thermal overload protection
• See data sheet for additional features

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

The ADP161 are ultralow quiescent current, low dropout, linear regulators that operate from 2.2 V to 5.5 V and provide up to 150 mA of output current. The low 195 mV dropout voltage at 150 mA load improves efficiency and allows operation over a wide input voltage range.

The ADP161 are specifically designed for stable operation with tiny 1 μF ± 30% ceramic input and output capacitors to meet the requirements of high performance, space-constrained applications.

The ADP161 also include a switched resistor to discharge the output automatically when the LDO is disabled.

The ADP161 are available as a adjustable output voltage regulators. They are only available in a 5-lead TSOT package. The ADP163 is identical to the ADP161 but does not include the output discharge function.

Short-circuit and thermal overload protection circuits prevent damage in adverse conditions.