Triple, 200 mA, Low Noise, High PSRR Voltage Regulator Data Sheet ADP322/ADP323 FEATURES TYPICAL APPLICATION CIRCUITS Fixed (ADP322) and adjustable output (ADP323) options VBIAS ADP322 VBIAS 2.5V TO Bias voltage range (VBIAS): 2.5 V to 5.5 V 5.5V + 1F LDO input voltage range (VIN1/VIN2, VIN3): 1.8 V to 5.5 V VIN1/VIN2 1.8V TO Three 200 mA low dropout voltage regulators (LDOs) 5.5V + LDO 1 VOUT1 1F 16-lead, 3 mm 3 mm LFCSP ON EN1 + OFF EN LD1 1F Initial accuracy: 1% VBIAS Stable with 1 F ceramic output capacitors LDO 2 VOUT2 No noise bypass capacitor required ON EN2 + OFF EN LD2 3 independent logic controlled enables 1F VBIAS Overcurrent and thermal protection VIN3 1.8V TO 5.5V Key specifications + LDO 3 VOUT3 1F ON EN3 High PSRR + OFF EN LD3 1F 76 dB PSRR up to 1 kHz GND 70 dB PSRR at 10 kHz 60 dB PSRR at 100 kHz Figure 1. Typical Application Circuit for ADP322 40 dB PSRR at 1 MHz Low output noise VBIAS ADP323 24 V rms typical output noise at V = 1.2 V OUT VBIAS 2.5V TO 5.5V 43 V rms typical output noise at V = 2.8 V + OUT 1F Excellent transient response VIN1/VIN2 1.8V TO VOUT1 Low dropout voltage: 110 mV at 200 mA load 5.5V + LDO 1 1F + ON FB1 85 A typical ground current at no load, all LDOs enabled 1F EN1 OFF EN LD1 100 s fast turn on circuit VBIAS Guaranteed 200 mA output current per regulator VOUT2 40C to +125C junction temperature LDO 2 ON + FB2 EN2 1F OFF EN LD2 APPLICATIONS VBIAS VIN3 Mobile phones 1.8V TO VOUT3 5.5V + LDO 3 Digital cameras and audio devices 1F ON + FB3 EN3 1F Portable and battery-powered equipment OFF EN LD3 Portable medical devices GND Post dc-to-dc regulation Figure 2. Typical Application Circuit for ADP323 GENERAL DESCRIPTION The ADP322/ADP323 200 mA triple output LDOs combine high The ADP322/ADP323 are available in a miniature 16-lead, 3 mm PSRR, low noise, low quiescent current, and low dropout voltage 3 mm LFCSP package and are stable with tiny 1 F 30% ceramic to extend the battery life of portable devices and are ideally suited output capacitors providing the smallest possible board area for for wireless applications with demanding performance and board a wide variety of portable power needs. space requirements. The ADP322 is available in output voltage combinations ranging The ADP322/ADP323 PSRR is greater than 60 dB for frequencies from 0.8 V to 3.3 V and offers overcurrent and thermal protection as high as 100 kHz while operating with a low headroom voltage. to prevent damage in adverse conditions. The ADP323 adjustable The ADP322/ADP323 offer much lower noise performance than triple LDO can be configured for any output voltage between competing LDOs without the need for a noise bypass capacitor. 0.5 V and 5 V with two resistors for each output. Rev. E 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 20102018 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com 09288-001 09288-053ADP322/ADP323 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Theory of Operation ...................................................................... 16 Applications ....................................................................................... 1 Applications Information .............................................................. 17 Typical Application Circuits ............................................................ 1 ADIsimPower Design Tool ....................................................... 17 General Description ......................................................................... 1 Capacitor Selection .................................................................... 17 Revision History ............................................................................... 2 Undervoltage Lockout ............................................................... 18 Specifications ..................................................................................... 3 Enable Feature ............................................................................ 18 Input and Output Capacitor, Recommended Specifications .. 4 Noise Reduction of the ADP323 in Adjustable Mode ........... 19 Absolute Maximum Ratings ............................................................ 5 Current-Limit and Thermal Overload Protection ................. 20 Thermal Data ................................................................................ 5 Thermal Considerations ............................................................ 20 Thermal Resistance ...................................................................... 5 Printed Circuit Board Layout Considerations........................ 22 ESD Caution .................................................................................. 5 Outline Dimensions ....................................................................... 23 Pin Configurations and Function Descriptions ........................... 6 Ordering Guide .......................................................................... 23 Typical Performance Characteristics ............................................. 8 REVISION HISTORY 10/2018Rev. D to Rev. E 9/2011Rev. 0 to Rev. A Change to Figure 56 ....................................................................... 19 Added Figure 2, Renumbered Sequentially ................................... 1 Changes to Ordering Guide .......................................................... 23 Changes to Theory of Operation Section.................................... 15 Added Figure 45, Renumbered Sequentially .............................. 15 3/2017Rev. C to Rev. D Changes to Ordering Guide .......................................................... 21 Updated Outline Dimensions ....................................................... 23 Changes to Ordering Guide .......................................................... 23 9/2010Revision 0: Initial Version 10/2015Rev. B to Rev. C Changes to Ordering Guide .......................................................... 23 11/2014Rev. A to Rev. B Changes to Features Section............................................................ 1 Changes to Table 1 ............................................................................ 3 Changes to Figure 30, Figure 31, Figure 32, and Figure 33 Added Figure 34 Renumbered Sequentially .............................. 12 Added Figure 35 and Figure 36 Changes to Figure 38, Figure 39, and Figure 40 ................................................................ 13 Added ADIsimPower Design Tool Section ................................. 17 Added Noise Reduction of the ADP323 in Adjustable Mode Section .............................................................................................. 19 Rev. E Page 2 of 24