Configurable, Dual 3 A/Single 6 A, Synchronous, Step-Down DC-to-DC Regulator Data Sheet ADP2116 FEATURES TYPICAL APPLICATION CIRCUIT V = 5V IN Configurable 3 A/3 A or 3 A/2 A dual-output load 10 combinations or 6 A combined single-output load 1F 100k 100k High efficiency: up to 95% EN2 EN1 Input voltage, V : 2.75 V to 5.5 V IN VIN4 VIN1 22F 22F VIN5 VIN2 Selectable fixed output voltage of 0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, VIN3 VIN6 PGOOD2 PGOOD1 or 3.3 V, or adjustable output voltage to 0.6 V minimum PGOOD1 PGOOD2 3.3H V = 2.5V, 3A OUT1 SW1 V = 1.2V, 3A 2.2H OUT2 1.5% accurate reference voltage SW3 ADP2116 SW2 SW4 47F 22F PGND1 Selectable switching frequency of 300 kHz, 600 kHz, 1.2 MHz, 47F 100F PGND3 PGND2 or synchronized from 200 kHz to 2 MHz PGND4 FB1 FB2 Optimized gate slew rate for reduced EMI 27k V2SET V1SET 4.7k SYNC External synchronization input or internal clock output SYNC/CLKOUT COMP1 COMP2 SS1 30k Dual-phase, 180 phase-shifted PWM channels 10nF 30k SS2 10nF 820pF Current mode for fast transient response 820pF Pulse skip mode with light loads or forced PWM operation 8.2k Input undervoltage lockout (UVLO) f = 600kHz SW Independent enable inputs and power-good outputs Overcurrent and thermal overload protection Figure 1. Programmable soft start 32-lead, 5 mm 5 mm LFCSP package Supported by ADIsimPower design tool APPLICATIONS synchronization pin is also configurable as a 90 out-of-phase Point-of-load regulation output clock, providing the possibility for a stackable multiphase Telecommunications and networking systems power solution. Consumer electronics The ADP2116 input voltage range is from 2.75 V to 5.5 V and can Industrial and instrumentation convert to a fixed output of 0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, or 3.3 V Medical that can be set independently for each channel using external GENERAL DESCRIPTION resistors. If a resistor divider is used, the output voltage can be The ADP2116 is a versatile, synchronous, step-down switching set as low as 0.6 V. The ADP2116 operates over the 40C to regulator that satisfies a wide range of customer point-of-load +125C junction temperature range. requirements. The two PWM channels can be configured to deliver 100 V = 5.0V V = 2.5V independent outputs at 3 A and 3 A (or at 3 A and 2 A) or can be IN OUT 95 V = 5.0V V = 3.3V IN OUT configured as a single interleaved output capable of delivering 6 A. The two PWM channels are 180 phase shifted to reduce input 90 ripple current and input capacitance. 85 The ADP2116 provides high efficiency and can operate at 80 switching frequencies of up to 2 MHz. At light loads, the ADP2116 can be set to operate in pulse skip mode for higher efficiency or 75 in forced PWM mode for noise sensitive applications. V = 3.3V V = 1.2V 70 IN OUT The ADP2116 is designed with an optimized slew rate to reduce 65 EMI emissions, allowing the device to power sensitive, high perfor- f = 600kHz SW mance signal chain circuits. The switching frequency can be set 60 to 300 kHz, 600 kHz, or 1.2 MHz, or it can be synchronized to an 10 100 1k 10k LOAD CURRENT (mA) external clock that minimizes the system noise. The bidirectional Figure 2. Typical Efficiency vs. Load Current Rev. B 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 20092016 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 (%) FREQ VDD SCFG OPCFG GND 08436-001 08436-002ADP2116 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Thermal Overload Protection .................................................. 22 Applications ....................................................................................... 1 Maximum Duty Cycle Operation ............................................ 22 General Description ......................................................................... 1 Synchronization .......................................................................... 22 Typical Application Circuit ............................................................. 1 Converter Configuration ............................................................... 23 Revision History ............................................................................... 2 Selecting the Output Voltage .................................................... 23 Specif icat ions ..................................................................................... 3 Setting the Oscillator Frequency .............................................. 24 Absolute Maximum Ratings ............................................................ 5 Synchronization and CLKOUT ................................................ 24 ESD Caution .................................................................................. 5 Operation Mode Configuration ............................................... 25 Pin Configuration and Function Descriptions ............................. 6 External Components Selection ................................................... 26 Typical Performance Characteristics ............................................. 8 ADIsimPower Design Tool ....................................................... 26 Line and Load Regulation ........................................................... 9 Input Capacitor Selection .......................................................... 26 Supply Current ............................................................................ 13 VDD RC Filter ............................................................................ 26 Load Transient Response ........................................................... 14 Inductor Selection ...................................................................... 26 Basic Functionality ..................................................................... 15 Output Capacitor Selection ....................................................... 27 Bode Plots .................................................................................... 18 Control Loop Compensation .................................................... 28 Simplified Block Diagram ............................................................. 19 Design Example .............................................................................. 29 Theory of Operation ...................................................................... 20 Channel 1 Configuration and Components Selection .......... 29 Control Architecture .................................................................. 20 Channel 2 Configuration and Components Selection .......... 30 Undervoltage Lockout (UVLO) ............................................... 20 System Configuration ................................................................ 31 Enable/Disable Control ............................................................. 20 Application Circuits ....................................................................... 32 Soft Start ...................................................................................... 20 Power Dissipation and Thermal Considerations ....................... 34 Power Good ................................................................................. 21 Circuit Board Layout Recommendations ................................... 35 Pulse Skip Mode ......................................................................... 21 Outline Dimensions ....................................................................... 36 Hiccup Mode Current Limit ..................................................... 22 Ordering Guide .......................................................................... 36 REVISION HISTORY 3/16Rev. A to Rev. B Changed CP-32-2 to CP-32-7 ...................................... Throughout Changes to Figure 3 .......................................................................... 6 Updated Outline Dimensions ....................................................... 36 Changes to Ordering Guide .......................................................... 36 6/12Rev. 0 to Rev. A Changes to Features Section............................................................ 1 Added ADIsimPower Design Tool Section ................................. 26 Updated Outline Dimensions ....................................................... 36 10/09Revision 0: Initial Version Rev. B Page 2 of 36