ADP166

PRODUCTION

Very Low Quiescent Current, 150 m A, LDO Regulator

Analog Devices ADP166 Product Info

10 February 2026 7

Features

Very low quiescent current
I_Q = 590 nA with 0 µA load
I_Q = 890 nA with 1 µA load
Maintains very low quiescent current in dropout (pass through mode):
I_{Q_DROP} = 720 nA with 0 µA load
I_{Q_DROP} = 1200 nA with 1 µA load
Stable with 1 µF ± 30% ceramic input and output capacitors
Maximum load current: I_{LOAD_MAX}: 150 mA

Input voltage range: 2.2 V to 5.5 V
Low shutdown current: 50 nA typical
Low dropout voltage: 120 mV at 150 mA load
Initial output voltage accuracy: ±1%
Accuracy over line, load, and temperature: ±3.5%
7 fixed output voltage options: 1.2 V to 3.3 V
Adjustable output option can be set from 1.2 V to 4.2 V
See data sheet for additional features

Part details & applications

The ADP165 / ADP166 are very low quiescent current, low dropout, linear regulator that operate from 2.2 V to 5.5 V and provides up to 150 mA of output current. The low 120 mV dropout voltage at 150 mA load improves efficiency and allows operation over a wide input voltage range.

The ADP165 / ADP166 are specifically designed for stable operation with a tiny 1 µF ± 30% ceramic input and output capacitors to meet the requirements of high performance, space-constrained applications.

The ADP165 / ADP166 are available in seven fixed output voltage options, ranging from 1.2 V to 3.3 V, and an adjustable output option. The ADP165 also include a switched resistor to discharge the output automatically when the LDO is disabled. The ADP166 is identical to the ADP165, but does not include the output discharge function.

Short-circuit and thermal overload protection circuits prevent damage in adverse conditions. The ADP165 / ADP166 are available in a tiny 5-lead TSOT, a 6-lead LFCSP and a 4-ball, 0.5 mm pitch WLCSP package for the smallest footprint solution to meet a variety of portable power applications.

APPLICATIONS

Portable and battery-powered equipment
Post dc-to-dc regulation
Portable medical devices
Wireless sensor network (WSN) devices

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