Very Low Quiescent Current,
150 mA, LDO Regulator
ADP165/ADP166
Data Sheet
FEATURES
TYPICAL APPLICATION CIRCUITS
ADP165/ADP166
Very low quiescent current
V
= 2.3V
1µF
V
= 1.8V
IN
OUT
1
2
3
VIN
GND
EN
VOUT
5
I
I
Q = 590 nA with 0 µA load
Q = 890 nA with 1 µA load
1µF
Maintains very low quiescent current in dropout (pass
through mode)
IQ_DROP = 720 nA with 0 µA load
ON
4
NC
OFF
NOTES
I
Q_DROP = 1200 nA with 1 µA load
1. NC = NO CONNECT. NOT CONNECTED INTERNALLY.
Stable with 1 µF ꢀ0% ceramic input and output capacitors
Maximum operating load current (ILOAD_MAX): 150 mA
Input voltage range: 2.2 V to 5.5 V
Figure 1. 5-Lead TSOT ADP165/ADP166 with Fixed Output Voltage, 1.8 V
ON
EN
4
3 GND
OFF
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: ꢀ.5%
7 fixed output voltage options: 1.2 V to ꢀ.ꢀ V
Adjustable output option can be set from 1.0 V to 4.2 V
PSRR: 72 dB at 100 Hz, VOUT = 1.2 V
ADP165/
ADP166
NC
5
6
2 NC
V
= 2.3V
1µF
V
= 1.8V
IN
OUT
VIN
1 VOUT
1µF
NOTES
1. NC = NO CONNECT. NOT CONNECTED INTERNALLY.
Figure 2. 6-Lead, 2 mm × 2 mm LFCSP ADP165/ADP166 with Fixed Output
Voltage, 1.8 V
Current-limit and thermal overload protection
Logic control enable
ADP165/ADP166
1
2
Integrated output discharge resistor
Three package options
5-lead TSOT package
6-lead, 2 mm × 2 mm LFCSP
4-ball, 0.5 mm pitch WLCSP
V
= 1.8V
V
= 2.3V
1µF
OUT
IN
VIN
VOUT
A
B
1µF
TOP VIEW
(Not to Scale)
ON
EN
GND
OFF
APPLICATIONS
Figure 3. 4-Ball WLCSP ADP165/ADP166 with Fixed Output Voltage, 1.8 V
Portable and battery-powered equipment
Post dc-to-dc regulation
Portable medical devices
Wireless sensor network (WSN) devices
GENERAL DESCRIPTION
The ADP165/ADP166 are very low quiescent current, low
dropout (LDO), linear regulators that operate from 2.2 V to 5.5 V
and provide up to 150 mA of output current. The low 120 mV
dropout voltage at a 150 mA load improves efficiency and allows
operation over a wide input voltage range.
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 includes a switched resistor to
discharge the output automatically when the LDO is disabled.
The ADP166 is identical to the ADP165, but it does not include
the output discharge function.
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.
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.
Rev. A
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