Very Low Quiescent Current, 150 A, with Output Discharge LDO Regulator

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

* Very low quiescent current

IQ = 590 nA with 0 µA load

IQ = 890 nA with 1 µA load

* Maintains very low quiescent current in dropout (pass through mode):

IQDROP = 720 nA with 0 µA load

IQDROP = 1200 nA with 1 µA load

* Stable with 1 µF ± 30% ceramic input and output capacitors

* Maximum load current: ILOADMAX: 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