anyCAP 100 mA Low Dropout Linear Regulator ADP3309 FEATURES FUNCTIONAL BLOCK DIAGRAM 1.2% accuracy over line and load regulations 25C ADP3309 Q1 IN OUT Ultralow dropout voltage: 120 mV typical 100 mA THERMAL CC R1 Requires only C = 0.47 F for stability ERR/NC OUT PROTECTION anyCAP LDOs are stable with all types of capacitors g Q2 DRIVER m (including MLCC) R2 SD Current and thermal limiting BANDGAP REF Low noise Low shutdown current: 1 A GND 2.8 V to 12 V supply range Figure 1. 20C to +85C ambient temperature range Several fixed voltage options Ultrasmall 5-lead SOT-23 package Excellent line and load regulations APPLICATIONS Cellular telephones Notebook, palmtop computers Battery-powered systems PCMCIA regulator Bar code scanners Camcorders, cameras GENERAL DESCRIPTION The ADP3309 is a member of the ADP330x family of precision The ADP3309 operates with a wide input voltage range from low dropout anyCAP voltage regulators. It is pin-for-pin and 2.8 V to 12 V and delivers a load current in excess of 100 mA. functionally compatible with Nationals LP2981, but offers The ADP3309 anyCAP LDO offers a wide range of output performance advantages. The ADP3309 stands out from voltages. conventional LDOs with a novel architecture and an enhanced ERR/NC 4 process. Its patented design requires only a 0.47 F output ADP3309-3.3 capacitor for stability. This device is stable with any type of V V = 3.3V IN 1 IN OUT 5 OUT capacitor regardless of its equivalent series resistance (ESR) + + C2 C1 0.47F 0.47F value, including ceramic types for space restricted applications. 3 2 ON The ADP3309 achieves 1.2% accuracy at room temperature OFF and 2.2% overall accuracy over temperature, line, and load GND regulations. The dropout voltage of the ADP3309 is only SD 120 mV (typical) at 100 mA. This device also includes a current Figure 2. Typical Application Circuit limit and a shutdown feature. In shutdown mode, the ground current is reduced to ~1 A. Rev. C 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. Fax: 781.461.3113 2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 00141-002 00141-001ADP3309 TABLE OF CONTENTS Features .............................................................................................. 1 Capacitor Selection: anyCAP.................................................... 10 Applications....................................................................................... 1 Thermal Overload Protection .................................................. 10 Functional Block Diagram .............................................................. 1 Calculating Junction Temperature........................................... 10 General Description ......................................................................... 1 Printed Circuit Board Layout Consideration ......................... 10 Revision History ............................................................................... 2 Shutdown Mode ......................................................................... 10 Specifications..................................................................................... 3 Error Flag Dropout Detector .................................................... 10 Absolute Maximum Ratings............................................................ 4 Application Circuits ....................................................................... 11 ESD Caution.................................................................................. 4 Crossover Switch ........................................................................ 11 Pin Configuration and Function Descriptions............................. 5 Higher Output Current ............................................................. 11 Typical Performance Characteristics ............................................. 6 Constant Dropout Post Regulator............................................ 11 Theory of Operation ........................................................................ 9 Outline Dimensions ....................................................................... 12 Application Information................................................................ 10 Ordering Guide .......................................................................... 12 REVISION HISTORY 12/06Rev. B to Rev. C Change to Table 1 ............................................................................. 3 Updated Outline Dimensions ....................................................... 12 Changes to the Ordering Guide.................................................... 12 7/04Rev. A to Rev. B. Changes to the Ordering Guide...................................................... 3 Updated Outline Dimensions ......................................................... 8 12/00Rev. 0 to Rev. A 9/98Revision 0: Initial Version Rev. C Page 2 of 12