High Accuracy, Ultralow I , 1 A, Q anyCAP Low Dropout Regulator ADP3338 FUNCTIONAL BLOCK DIAGRAM FEATURES High accuracy over line and load: 0.8% 25C, Q1 OUT IN 1.4% over temperature ADP3338 Ultralow dropout voltage: 190 mV (typ) 1 A R1 THERMAL PROTECTION CC Requires only CO = 1.0 F for stability anyCAP is stable with any type of capacitor (including MLCC) g DRIVER m Current and thermal limiting R2 Low noise BANDGAP REF 2.7 V to 8 V supply range 40C to +85C ambient temperature range SOT-223 package GND Figure 1. APPLICATIONS Notebook, palmtop computers ADP3338 SCSI terminators V IN V OUT IN OUT Battery-powered systems 1F 1F GND Bar code scanners Camcorders, cameras Home entertainment systems Figure 2. Typical Application Circuit Networking systems DSP/ASIC supplies GENERAL DESCRIPTION with any good quality capacitor, including ceramic (MLCC) The ADP3338 is a member of the ADP33xx family of precision, types for space-restricted applications. The ADP3338 achieves low dropout (LDO), anyCAP voltage regulators. The ADP3338 operates with an input voltage range of 2.7 V to 8 V and delivers exceptional accuracy of 0.8% at room temperature and 1.4% a load current up to 1 A. The ADP3338 stands out from over temperature, line, and load variations. The dropout voltage conventional LDOs with a novel architecture and an enhanced of the ADP3338 is only 190 mV (typical) at 1 A. The device also includes a safety current limit and thermal overload protection. process that offers performance advantages and higher output The ADP3338 has ultralow quiescent current: 110 A (typical) current than its competition. Its patented design requires only a in light load situations. 1 F output capacitor for stability. This device is insensitive to output capacitor equivalent series resistance (ESR), and is stable 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. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Specifications subject to change without notice. No license is granted by implication Tel: 781.329.4700 www.analog.com 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 2005 Analog Devices, Inc. All rights reserved. 02050-002 02050-001ADP3338 TABLE OF CONTENTS Specifications..................................................................................... 3 Capacitor Selection .................................................................... 10 Absolute Maximum Ratings............................................................ 4 Output Current Limit ................................................................ 10 ESD Caution.................................................................................. 4 Thermal Overload Protection .................................................. 10 Pin Configuration and Function Descriptions............................. 5 Calculating Power Dissipation ................................................. 10 Typical Performance Characteristics ............................................. 6 Printed Circuit Board Layout Considerations ....................... 10 Theory of Operation ........................................................................ 9 Outline Dimensions ....................................................................... 12 Application Information................................................................ 10 Ordering Guide .......................................................................... 13 REVISION HISTORY 6/05Data Sheet Changed from Rev. A to Rev. B Added Pin Function Descriptions Table ....................................... 5 Changes to Ordering Guide .......................................................... 13 6/04Data Sheet Changed from Rev. 0 to Rev. A Updated Format..............................................................Universal Changes to Figures 5, 11, 12, 13, 14, 15 ..................................... 6 Updated Outline Dimensions ................................................... 12 Changes to Ordering Guide ...................................................... 12 6/01Rev. 0: Initial Version Rev. B Page 2 of 16