6.5 V, 4 A, High Efficiency, Step-Down, DC-to-DC Regulator Data Sheet ADP2164 FEATURES TYPICAL APPLICATIONS CIRCUIT R1 4 A continuous output current V IN C C1 IN 43 m and 29 m integrated FET R2 1.5% output accuracy PGOOD VIN PVIN Input voltage range: 2.7 V to 6.5 V L EN SW V Output voltage: 0.6 V to V OUT IN C OUT Switching frequency SYNC FB ADP2164 Fixed frequency: 600 kHz or 1.2 MHz TRK PGND Adjustable frequency: 500 kHz to 1.4 MHz GND RT Synchronizable from 500 kHz to 1.4 MHz R T Selectable synchronize phase shift: 0 or 180 Current mode architecture Figure 1. Precision enable input Power-good output 100 Voltage tracking input 95 Integrated soft start Internal compensation 90 Starts up into a precharged output 85 UVLO, OVP, OCP, and thermal shutdown 80 Available in 16-lead, 4 mm 4 mm LFCSP package 75 Supported by ADIsimPower design tool 70 APPLICATIONS 65 Point-of-load conversion 60 Communications and networking equipment V = 5V V = 1.2V IN OUT 55 f = 600kHz V = 3.3V Industrial and instrumentation S OUT 50 Consumer electronics 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 OUTPUT CURRENT (A) Figure 2. Efficiency vs. Output Current GENERAL DESCRIPTION The ADP2164 is a 4 A, synchronous, step-down, dc-to-dc regulator The ADP2164 integrates a pair of low on-resistance P-channel in a compact 4 mm 4 mm LFCSP package. The regulator uses a and N-channel internal MOSFETs to maximize efficiency and current mode, constant frequency pulse-width modulation (PWM) minimize external component count. The 100% duty cycle control scheme for excellent stability and transient response. operation allows low dropout voltage at 4 A output current. The input voltage range of the ADP2164 is 2.7 V to 6.5 V. The The high, 1.2 MHz PWM switching frequency allows the use of output voltage of the ADP2164 is adjustable from 0.6 V to the small external components, and the SYNC input enables multiple input voltage (V ). The ADP2164 is also available in six preset ICs to synchronize out of phase to reduce ripple and eliminate IN output voltage options: 3.3 V, 2.5 V, 1.8 V, 1.5 V, 1.2 V, and 1.0 V. beat frequencies. Other key features of the ADP2164 include undervoltage lockout (UVLO), integrated soft start to limit inrush current at startup, overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown. Rev. C 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 20112018 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 EFFICIENCY (%) 09944-001 09944-002ADP2164 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Oscillator and Synchronization ................................................ 14 Applications ....................................................................................... 1 Power Good ................................................................................ 15 Typical Applications Circuit ............................................................ 1 Current Limit and Short-Circuit Protection ............................ 15 General Description ......................................................................... 1 Overvoltage Protection (OVP) ................................................. 15 Revision History ............................................................................... 2 Undervoltage Lockout (UVLO) ............................................... 15 Specifications ..................................................................................... 3 Thermal Shutdown .................................................................... 15 Absolute Maximum Ratings ............................................................ 5 Applications Information .............................................................. 16 Thermal Resistance ...................................................................... 5 ADIsimPower Design Tool ....................................................... 16 ESD Caution .................................................................................. 5 Output Voltage Selection ........................................................... 16 Pin Configuration and Function Descriptions ............................. 6 Inductor Selection ...................................................................... 16 Typical Performance Characteristics ............................................. 7 Output Capacitor Selection....................................................... 16 Functional Block Diagram ............................................................ 13 Input Capacitor Selection .......................................................... 17 Theory of Operation ...................................................................... 14 Voltage Tracking ......................................................................... 17 Control Scheme .......................................................................... 14 Applications Circuits ...................................................................... 18 Slope Compensation .................................................................. 14 Outline Dimensions ....................................................................... 19 Precision Enable/Shutdown ...................................................... 14 Ordering Guide .......................................................................... 19 Integrated Soft Start ................................................................... 14 REVISION HISTORY 6/2018Rev. B to Rev. C 6/2012Rev. 0 to Rev. A Updated Outline Dimensions ....................................................... 19 Changes to Features Section ............................................................ 1 Changes to Ordering Guide .......................................................... 19 Added ADIsimPower Design Tool Section ................................. 16 8/2017Rev. A to Rev. B 12/2011Revision 0: Initial Version Changed CP-16-26 to CP-16-17 .................................. Throughout Updated Outline Dimensions ....................................................... 19 Changes to Ordering Guide .......................................................... 19 Rev. C Page 2 of 19