300 mA, Low Quiescent Current,
CMOS Linear Regulator
ADP172
Data Sheet
FEATURES
TYPICAL APPLICATION CIRCUITS
Maximum output current: 300 mA
Input voltage range: 1.6 V to 3.6 V
Low quiescent current
VIN VOUT
V
= 2.3V
C1
V
= 1.8V
C2
IN
OUT
U1
GND
EN
ON
I
I
GND = 23 µA with 0 mA load
GND = 170 µA with 300 mA load
OFF
Figure 1. ADP172 with Fixed Output Voltage, 1.8 V
Low shutdown current: <1 µA
Low dropout voltage: 50 mV at 300 mA load
Output voltage accuracy: 1%
Up to 31 fixed-output voltage options available
from 0.8 V to 3.0 V
Accuracy over line, load, and temperature: 3%
Stable with small 1 µF ceramic output capacitor
PSRR performance of 70 dB at 10 kHz and 73 dB at 1 kHz
Low noise: 30 µV rms at VOUT = 0.8 V
Current limit and thermal overload protection
Logic-controlled enable
Tiny 4-ball, 0.5 mm pitch WLCSP package
APPLICATIONS
Mobile phones
Digital camera and audio devices
Portable and battery-powered equipment
DSP/FPGA/microprocessor supplies
Post dc-to-dc regulation
GENERAL DESCRIPTION
The ADP172 is a low voltage input, low quiescent current, low-
dropout (LDO) linear regulator that operates from 1.6 V to 3.6 V
and provides up to 300 mA of output current. The low 50 mV
dropout voltage at 300 mA load improves efficiency and allows
operation over a wide input voltage range. The low 23 µA of
quiescent current at no load makes the ADP172 ideal for
battery-operated portable equipment.
commodity-type LDOs, the ADP172 provides 20 dB to 40 dB
better power supply rejection ratio (PSRR) at 100 kHz, making the
ADP172 an ideal power source for analog-to-digital converter
(ADC) mixed-signal processor systems and allowing use of
smaller size bypass capacitors. In addition, low output noise
performance without the need for an additional bypass capacitor
further reduces printed circuit board (PCB) component count.
The ADP172 is capable of 31 fixed-output voltage options, ranging
from 0.8 V t o 3 . 0 V. The ADP172 is optimized for stable operation
with small 1 µF ceramic output capacitors. Ideal for powering
digital processors, the ADP172 exhibits good transient perform-
ance and occupies minimal board space. Compared with
Short-circuit protection and thermal overload protection circuits
prevent damage in adverse conditions. The ADP172 is available
in a tiny 4-ball, 0.5 mm pitch WLCSP for the smallest footprint
solution to meet a variety of portable power applications.
Rev. E
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Tel: 781.329.4700 ©2010–2014 Analog Devices, Inc. All rights reserved.
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