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ADP172 Datasheet

Low Quiescent Current CMOS Linear Regulator

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ADP172 pdf
FEATURES
Maximum output current: 300 mA
Input voltage range: 1.6 V to 3.6 V
Low quiescent current
IGND = 23 μA with 0 mA load
IGND = 170 μA with 300 mA load
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.
The ADP172 is capable of 31 fixed-output voltage options, ranging
from 0.8 V to 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
300 mA, Low Quiescent Current,www.DataSheet4U.com
CMOS Linear Regulator
ADP172
TYPICAL APPLICATION CIRCUITS
VIN = 2.3V
C1
ON
OFF
VIN VOUT
EN U1GND
VOUT = 1.8V
C2
Figure 1. ADP172 with Fixed Output Voltage, 1.8 V
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.
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. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2010 Analog Devices, Inc. All rights reserved.


Analog Devices Semiconductor Electronic Components Datasheet

ADP172 Datasheet

Low Quiescent Current CMOS Linear Regulator

No Preview Available !

ADP172 pdf
ADP172
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Typical Application Circuits............................................................ 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Input and Output Capacitor, Recommended Specifications.. 4
Absolute Maximum Ratings............................................................ 5
Thermal Data ................................................................................ 5
Thermal Resistance ...................................................................... 5
ESD Caution.................................................................................. 5
Pin Configuration and Function Descriptions............................. 6
REVISION HISTORY
5/10—Rev. A to Rev. B
Changes to Figure 1.......................................................................... 1
4/10—Rev. 0 to Rev. A
Changes to Ordering Guide .......................................................... 17
2/10—Revision 0: Initial Version
www.DataSheet4U.com
Typical Performance Characteristics ..............................................7
Theory of Operation ...................................................................... 11
Applications Information .............................................................. 12
Capacitor Selection .................................................................... 12
Undervoltage Lockout ............................................................... 13
Enable Feature ............................................................................ 13
Current Limit and Thermal Overload Protection ................. 14
Thermal Considerations............................................................ 14
Printed Circuit Board Layout Considerations ....................... 16
Outline Dimensions ....................................................................... 17
Ordering Guide .......................................................................... 17
Rev. B | Page 2 of 20


Part Number ADP172
Description Low Quiescent Current CMOS Linear Regulator
Maker Analog Devices
Total Page 20 Pages
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