300 mA, Low Quiescent Current, CMOS Linear Regulators Data Sheet ADP170/ADP171 FEATURES TYPICAL APPLICATION CIRCUITS Maximum output current: 300 mA V V IN OUT 1 VIN VOUT 5 Input voltage range: 1.6 V to 3.6 V C1 C2 ADP170 Low quiescent current 2 GND I = 23 A with 0 mA load GND I = 170 A with 300 mA load ON GND 3 EN NC 4 OFF Low shutdown current: <1 A Low dropout voltage: 66 mV at 300 mA load Output voltage accuracy: 1% Figure 1. ADP170 with Fixed Output Voltage, 1.8 V Up to 31 fixed-output voltage options available from 0.8 V to 3.0 V V = 2.3V V = 1.8V IN Adjustable-output voltage range OUT 1 VIN 5 VOUT 0.8 V to 3.0 V (ADP171) C C OUT IN ADP171 1F 1F Accuracy over line, load, and temperature: 3% 2 GND R1 Stable with small 1 F ceramic output capacitor ON PSRR performance of 70 dB at 10 kHz and 73 dB at 1 kHz 3 EN ADJ 4 OFF Low noise: 30 V rms at V = 0.8 V OUT R2 Current limit and thermal overload protection Logic-controlled enable Compact 5-lead TSOT package Figure 2. ADP171 with Adjustable Output Voltage APPLICATIONS Mobile phones Digital camera and audio devices Portable and battery-powered equipment DSP/FPGA/microprocessor supplies Post dc-dc regulation GENERAL DESCRIPTION The ADP170/ADP171 are low voltage input, low quiescent performance and occupy minimal board space. Compared with current, low-dropout (LDO) linear regulators that operate from commodity types of LDOs, the ADP170/ADP171 provide 20 dB 1.6 V to 3.6 V and provide up to 300 mA of output current. The to 40 dB better power supply rejection ratio (PSRR) at 100 kHz, low 66 mV dropout voltage at 300 mA load improves efficiency making the ADP170/ADP171 an ideal power source for analog- and allows operation over a wide input voltage range. The low to-digital converter (ADC) mixed-signal processor systems and 23 A of quiescent current at a 0 mA load makes the ADP170/ allowing use of smaller size bypass capacitors. In addition, low ADP171 ideal for battery-operated portable equipment. output noise performance without the need for an additional bypass capacitor further reduces printed circuit board (PCB) The ADP170 is capable of 31 fixed-output voltage options, ranging component count. from 0.8 V to 3.0 V. ADP171 is an adjustable version, which allows output voltages that range from 0.8 V to 3.0 V via an external Short-circuit protection and thermal overload protection circuits divider. The ADP170/ADP171 are optimized for stable operation prevent damage in adverse conditions. The ADP170/ADP171 with small 1 F ceramic output capacitors. Ideal for powering are available in tiny 5-lead TSOT for the smallest footprint digital processors, the ADP170/ADP171 exhibit good transient solution to meet a variety of portable power applications. Rev. C Document Feedback 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20092014 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 07716-001 07716-002ADP170/ADP171 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ..............................................7 Applications ....................................................................................... 1 Theory of Operation ...................................................................... 11 Typical Application Circuits ............................................................ 1 Applications Information .............................................................. 12 General Description ......................................................................... 1 Capacitor Selection .................................................................... 12 Revision History ............................................................................... 2 Undervoltage Lockout ............................................................... 13 Specifications ..................................................................................... 3 Enable Feature ............................................................................ 13 Input and Output Capacitor, Recommended Specifications ........ 4 Current Limit and Thermal Overload Protection ................. 14 Absolute Maximum Ratings ............................................................ 5 Thermal Considerations ............................................................ 14 Thermal Data ................................................................................ 5 Printed Circuit Board Layout Considerations ....................... 16 Thermal Resistance ...................................................................... 5 Outline Dimensions ....................................................................... 17 ESD Caution .................................................................................. 5 Ordering Guide .......................................................................... 17 Pin Configurations and Function Descriptions ........................... 6 REVISION HISTORY 1/14Rev. B to Rev. C Changes to Ordering Guide .......................................................... 17 5/10Rev. A to Rev. B Changes to Figure 1 and Figure 2 ................................................... 1 Updated Outline Dimensions ....................................................... 17 Changes to Ordering Guide .......................................................... 17 6/09Rev. 0 to Rev. A Changes to Features Section............................................................ 1 Updated Outline Dimensions ....................................................... 17 1/09Revision 0: Initial Version Rev. C Page 2 of 20