500 mA, Low Dropout, CMOS Linear Regulator ADP1715/ADP1716 FEATURES TYPICAL APPLICATION CIRCUITS Maximum output current: 500 mA ADP1715 Input voltage range: 2.5 V to 5.5 V 1 EN GND 8 Low shutdown current: <1 A V = 5V 2 IN GND 7 IN Low dropout voltage: 3 6 2.2F OUT GND 250 mV 500 mA load 4 SS GND 5 V = 3.3V OUT 50 mV 100 mA load 2.2F 10nF Initial accuracy: 1% Accuracy over line, load, and temperature: 3% Figure 1. ADP1715 with Fixed Output Voltage, 3.3 V 16 fixed output voltage options with soft start: ADP1715 0.75 V to 3.3 V (ADP1715) ADJUSTABLE Adjustable output voltage option: 0.8 V to 5.0 V 1 EN GND 8 (ADP1715 Adjustable) V = 5V 2 7 IN GND IN 16 fixed output voltage options with tracking: 3 OUT GND 6 2.2F R1 0.75 V to 3.3 V (ADP1716) 4 5 ADJ GND V = 0.8(1 + R1/R2) OUT Stable with small 2.2 F ceramic output capacitor R2 2.2F Excellent load/line transient response Current limit and thermal overload protection Figure 2. ADP1715 with Adjustable Output Voltage, 0.8 V to 5.0 V Logic controlled enable 8-lead thermally enhanced MSOP package ADP1716 V (V) OUT 1 8 APPLICATIONS EN GND 3 V = 5V 2 IN GND 7 IN Notebook computers 2 3 6 2.2F OUT GND Memory components 1 4 TRK GND 5 V OUT Telecommunications equipment 0 123 45 2.2F V = 0V TO 5V Network equipment V (V) TRK TRK DSP/FPGA/P supplies Figure 3. ADP1716 with Output Voltage Tracking Instrumentation equipment/data acquisition systems GENERAL DESCRIPTION between 0.75 V and 3.3 V the adjustable output voltage can The ADP1715/ADP1716 are low dropout, CMOS linear be set to any value between 0.8 V and 5.0 V by an external regulators that operate from 2.5 V to 5.5 V and provide up to voltage divider connected from OUT to ADJ. The variable 500 mA of output current. Using an advanced proprietary soft start uses an external capacitor at SS to control the architecture, they provide high power supply rejection and output voltage ramp. Tracking limits the output voltage to achieve excellent line and load transient response with just a the at-or-below voltage at the TRK pin. small 2.2 F ceramic output capacitor. The ADP1715/ADP1716 are available in 8-lead thermally Three versions of this part are available, one with fixed enhanced MSOP packages, making them not only a very output voltage options and variable soft start (ADP1715), compact solution but also providing excellent thermal one with adjustable output voltage and fixed soft start performance for applications requiring up to 500 mA of output (ADP1715 Adjustable), and one with voltage tracking in current in a small, low profile footprint. fixed output voltage options (ADP1716). The fixed output voltage options are internally set to one of sixteen values Rev. 0 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. 06110-001 06110-002 06110-003ADP1715/ADP1716 TABLE OF CONTENTS Features .............................................................................................. 1 Track Mode (ADP1716) ............................................................ 11 Applications....................................................................................... 1 Enable Feature ............................................................................ 11 Typical Application Circuits............................................................ 1 Application Information................................................................ 12 General Description ......................................................................... 1 Capacitor Selection .................................................................... 12 Revision History ............................................................................... 2 Current Limit and Thermal Overload Protection ................. 12 Specifications..................................................................................... 3 Thermal Considerations............................................................ 12 Absolute Maximum Ratings............................................................ 4 Printed Circuit Board Layout Considerations ....................... 15 Thermal Resistance ...................................................................... 4 Outline Dimensions....................................................................... 16 ESD Caution.................................................................................. 4 Ordering Guide .......................................................................... 17 Pin Configurations and Function Descriptions ........................... 5 Typical Performance Characteristics ............................................. 6 Theory of Operation ...................................................................... 10 Soft-Start Function (ADP1715)................................................ 10 Adjustable Output Voltage (ADP1715 Adjustable) ............... 11 REVISION HISTORY 9/06Rev. 0: Initial Version Rev. 0 Page 2 of 20