Dual, 300 mA Output, Low Noise, High PSRR Voltage Regulators Data Sheet ADP222/ADP223/ADP224/ADP225 FEATURES TYPICAL APPLICATION CIRCUITS V = 4.2V IN Input voltage range: 2.5 V to 5.5 V + C1 Small, 8-lead, 2 mm 2 mm LFCSP package 1F R1 Initial accuracy: 1% ON OFF R2 High PSRR: 70 dB at 10 kHz, 60 dB at 100 kHz, 40 dB at 1 MHz 1 8 EN1 ADJ1 Low noise: 27 V rms at V = 1.2 V, 50 V rms at V = 2.8 V OUT OUT ADP223/ ON OFF VOUT1 = 2.0V ADP225 Excellent transient response 2 7 EN2 VOUT1 + C2 Low dropout voltage: 170 mV at 300 mA load 1F 65 A typical ground current at no load, both LDOs enabled 3 6 GND VIN Fixed output voltage from 0.8 V to 3.3 V (ADP222/ADP224) VOUT2 = 2.8V 4 ADJ2 VOUT2 5 Adjustable output voltage range from 0.5 V to 5.0 V + C3 R3 1F (ADP223/ADP225) R4 Quick output discharge (QOD)ADP224/ADP225 Overcurrent and thermal protection Figure 1. ADP223/ADP225 APPLICATIONS V = 4.2V IN + Portable and battery-powered equipment C1 1F Portable medical devices ON Post dc-to-dc regulation OFF 1 8 EN1 SENSE1 Point of sale terminals ADP222/ ON Credit card readers OFF VOUT1 = 1.5V ADP224 2 7 EN2 VOUT1 Automatic meter readers + C2 1F Wireless network equipment 3 6 GND VIN VOUT2 = 3.3V 4 SENSE2 VOUT2 5 + C3 1F Figure 2. ADP222/ADP224 GENERAL DESCRIPTION The 300 mA, adjustable dual output ADP223/ADP225 and 100 kHz while operating with a low headroom voltage. The fixed dual output ADP222/ADP224 combine high PSRR, low ADP222/ADP223/ADP224/ADP225 offer much lower noise noise, low quiescent current, and low dropout voltage in a performance than competing LDOs without the need for a voltage regulator that is ideally suited for wireless applications noise bypass capacitor. Overcurrent and thermal protection with demanding performance and board space requirements. circuitry prevent damage in adverse conditions. The ADP222/ADP224 are available with fixed outputs voltages The ADP224 and ADP225 are identical to the ADP222 and from 0.8V to 3.3V. The adjustable output ADP223/ADP225 may ADP223, respectively, but with the addition of a quick output be set to output voltages from 0.5 V to 5.0 V. The low quiescent discharge (QOD) feature. current, low dropout voltage, and wide input voltage range of The ADP222/ADP223/ADP224/ADP225 are available in a the ADP222/ADP223/ADP224/ADP225 extend the battery life small 8-lead, 2 mm 2 mm LFCSP package and are stable with of portable devices. tiny 1 F, 30% ceramic output capacitors, resulting in the smallest The ADP222/ADP223/ADP224/ADP225 maintain power possible board area for a wide variety of portable power needs. supply rejection greater than 60 dB for frequencies as high as 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 20112014 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 09376-101 09376-001ADP222/ADP223/ADP224/ADP225 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ..............................................7 Applications ....................................................................................... 1 Theory of Operation ...................................................................... 17 Typical Application Circuits ............................................................ 1 Applications Information .............................................................. 18 General Description ......................................................................... 1 Capacitor Selection .................................................................... 18 Revision History ............................................................................... 2 Enable Feature ............................................................................ 19 Specif icat ions ..................................................................................... 3 Quick Output Discharge (QOD) Function ............................ 19 Input and Output Capacitor, Recommended Specifications .. 4 Current Limit and Thermal Overload Protection ................. 20 Absolute Maximum Ratings ............................................................ 5 Thermal Considerations ............................................................ 20 Thermal Data ................................................................................ 5 Printed Circuit Board Layout Considerations ....................... 22 Thermal Resistance ...................................................................... 5 Outline Dimensions ....................................................................... 23 ESD Caution .................................................................................. 5 Ordering Guide .......................................................................... 24 Pin Configuration and Function Descriptions ............................. 6 REVISION HISTORY 5/14Rev. D to Rev. E 7/11Rev. 0 to Rev. A Changes to Figure 1 .......................................................................... 1 Added ADP222, ADP224, and ADP225 ......................... Universal Changes to Figure 64, V Equation and Following Text ...... 17 Changes to Features Section, Applications Section, OUT1 Deleted Paralleling Outputs to Increase Output Current Section General Description Section, and Figure 2 .................................... 1 and Figure 70 ................................................................................... 19 Changes to Table 1 ............................................................................. 3 Updated Outline Dimensions ....................................................... 23 Added Figure 4 Renumbered Sequentially ................................... 6 Changes to Table 5 ............................................................................. 6 1/13Rev. C to Rev. D Changes to Typical Performance Characteristics Section ........... 7 Changes to Table 5 ............................................................................. 6 Changes to Theory of Operation Section and Figure 62 .......... 17 Changes to Current Limit and Thermal Overload Protection Added Figure 63 ............................................................................. 17 Section ............................................................................................... 20 Added Quick Output Discharge (QOD) Function Section 8/12Rev. B to Rev. C Added Figure 70 ............................................................................. 20 Changes to Ordering Guide .......................................................... 23 2/11Revision 0: Initial Version 8/11Rev. A to Rev. B Changes to Features and General Descriptions Sections ............ 1 Added Figure 64 Renumbered Sequentially .............................. 17 Changes to Theory of Operation Section .................................... 17 Changes to Output Capacitor Section ......................................... 18 Changes to Paralleling Outputs to Increase Output Current Section ............................................................................... 19 Updated Outline Dimensions ....................................................... 23 Rev. E Page 2 of 24