ADP122-3.3-EVALZ Analog Devices

5.5 V Input, 300 mA, Low Quiescent Current, CMOS Linear Regulator Data Sheet ADP122/ADP123 FEATURES TYPICAL APPLICATION CIRCUITS Input voltage supply range: 2.3 V to 5.5 V V = 2.3V TO 5.5V V = 1.8V IN OUT 1 VIN VOUT 5 300 mA maximum output current C C IN OUT ADP122 Fixed and adjustable output voltage versions 1F 1F 2 GND Very low dropout voltage: 85 mV at 300 mA load Low quiescent current: 45 A at no load ON 3 4 EN NC Low shutdown current: <1 A OFF Initial accuracy: 1% accuracy Figure 1. ADP122 with Fixed Output Voltage (TSOT Version) Up to 31 fixed-output voltage options available from 1.75 V to 3.3 V V = 2.3V TO 5.5V V = 0.5V(1 + R1/R2) IN OUT Adjustable-output voltage range 1 VIN VOUT 5 C C IN OUT 0.8 V to 5.0 V (ADP123) ADP123 1F 1F R1 Excellent PSRR performance: 60 dB at 100 kHz 2 GND Excellent load/line transient response ON Optimized for small 1.0 F ceramic capacitors 3 EN ADJ 4 OFF Current limit and thermal overload protection R2 Logic controlled enable Compact packages: 5-lead TSOT and 6-lead 2 mm 2 mm LFCSP Figure 2. ADP123 with Adjustable Output Voltage (TSOT Version) APPLICATIONS VOUT = 1.8V VIN = 2.3V TO 5.5V 1 6 VOUT VIN C2 C1 Digital camera and audio devices 1F 1F Portable and battery-powered equipment 2 5 GND NC NC GND Automatic meter reading (AMR) meters ON 3 4 GND EN OFF GPS and location management units GND Medical instrumentation ADP122 TOP VIEW Point-of-sale equipment (Not to Scale) NC = NOT CONNECT. THIS PIN CAN BE LEFT FLOATING GENERAL DESCRIPTION OR CONNECTED TO GROUND. The ADP122/ADP123 are low quiescent current, low dropout Figure 3. ADP122 with Fixed Output Voltage (LFCSP Version) linear regulators. They are designed to operate from an input VOUT = 0.5V (1 + R1/R2) VIN = 2.3V TO 5.5V 1 6 VOUT VIN voltage between 2.3 V and 5.5 V and to provide up to 300 mA of C2 C1 R1 1F 1F 2 output current. The low 85 mV dropout voltage at a 300 mA load ADJ NC 5 GND GND R2 improves efficiency and allows operation over a wide input ON 3 4 GND GND EN OFF voltage range. GND ADP123 The low 170 A of quiescent current at full load makes the ADP122 TOP VIEW (Not to Scale) ideal for battery-operated portable equipment. NC = NOT CONNECT. THIS PIN CAN BE LEFT FLOATING The ADP122 is capable of 31 fixed output voltages from 1.75 V OR CONNECTED TO GROUND. to 3.3 V. The ADP123 is the adjustable version of the device and Figure 4. ADP123 with Adjustable Output Voltage (LFCSP Version) allows the output voltage to be set between 0.8 V and 5.0 V by The ADP122/ADP123 have an internal soft start that gives a an external voltage divider. constant start-up time of 350 s. Short-circuit protection and The ADP122/ADP123 are specifically designed for stable operation thermal overload protection circuits prevent damage in adverse with tiny 1 F ceramic input and output capacitors to meet the conditions. The ADP122/ADP123 are available in a tiny, 5-lead requirements of high performance, space constrained applications. TSOT package and 6-lead LFCSP package for the smallest footprint solution to meet a variety of portable applications. Rev. E 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 www.analog.com 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. Fax: 781.461.3113 20092012 Analog Devices, Inc. All rights reserved. 08399-001 08399-135 08399-002 08399-136ADP122/ADP123 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Theory of Operation ...................................................................... 11 Applications ....................................................................................... 1 Applications Information .............................................................. 12 General Description ......................................................................... 1 Capacitor Selection .................................................................... 12 Typical Application Circuits ............................................................ 1 Undervoltage Lockout ............................................................... 13 Revision History ............................................................................... 2 Enable Feature ............................................................................ 13 Specifications ..................................................................................... 3 Current Limit and Thermal Overload Protection ................. 14 Recommended Specifications ..................................................... 4 Thermal Considerations ............................................................ 14 Absolute Maximum Ratings ............................................................ 5 Junction Temperature Calculations For TSOT Package ....... 15 Thermal Data ................................................................................ 5 Junction Temperature Calculations For LFCSP Package ...... 17 Thermal Resistance ...................................................................... 5 Printed Circuit Board Layout Considerations........................ 19 ESD Caution .................................................................................. 5 Outline Dimensions ....................................................................... 20 Pin Configurations and Function Descriptions ........................... 6 Ordering Guide .......................................................................... 21 Typical Performance Characteristics ............................................. 7 REVISION HISTORY 6/12Rev. D to Rev. E Added 6-Lead LFCSP Package .................................... Throughout Added Figure 3 and Figure 4 (Renumbered Sequentially) .......... 1 Changes to Table 3 ............................................................................. 5 Changes to Table 4 ............................................................................. 5 4/12Rev. C to Rev. D Changes to Pin Configuration and Function Descriptions Changes to Ordering Guide ........................................................... 21 Section .................................................................................................6 Changes to Thermal Considerations Section ............................. 14 4/12Rev. B to Rev. C Added Junction Temperature Calculations for LFCSP Package Changes to Operating Ambient Temperature Range Section .............................................................................................. 17 Table 3 ................................................................................................. 5 Updated Outline Dimensions ...................................................... 20 3/12Rev. A to Rev. B Changes to Ordering Guide .......................................................... 21 Added V = 2.8 V to Figure 23 Caption...................................... 9 10/09Revision 0: Initial Version OUT Updated Outline Dimensions ....................................................... 20 6/11Rev. 0 to Rev. A Rev. E Page 2 of 24