Quad Buck Regulator Integrated Power Solution Data Sheet ADP5054 FEATURES TYPICAL APPLICATION CIRCUIT Wide input voltage range: 4.5 V to 15.5 V ADP5054 VREG 1.5% output accuracy over full temperature range SYNC/MODE INTERNAL C1 VDD VREG OSCILLATOR RT 250 kHz to 2 MHz adjustable switching frequency with 100mA C0 individual frequency option FB1 PVIN1 BST1 4.5V TO 15.5V Power regulation SW1 C2 C3 L1 CHANNEL 1 VOUT1 Channel 1 and Channel 2 COMP1 BUCK (2A/4A/6A) VREG C4 Q1 Programmable 2 A/4 A/6 A sync buck regulators with EN1 DL1 VREG low-side FET drivers CFG12 PGND (SS, 1/2 f , Channel 3 and Channel 4: 2.5 A sync buck regulators SW PARALLEL) DL2 Flexible parallel operation SW2 Q2 C5 L2 CHANNEL 2 VOUT2 PVIN2 VREG Single 12 A output (Channel 1 and Channel 2 in parallel) BUCK COMP2 (2A/4A/6A) C6 C7 BST2 Single 5 A output (Channel 3 and Channel 4 in parallel) EN2 FB2 Low 1/f noise density PWRGD BST3 40 V rms at 0.8 V for 10 Hz to 100 kHz PVIN3 REF SW3 C8 C9 L3 VOUT3 Precision enable with 0.811 V accurate threshold COMP3 CHANNEL 3 BUCK FB3 (2.5A) C10 Active output discharge switch EN3 PGND3 FPWM/PSM mode selection VREG CFG34 BST4 (SS, 1/2 f , Frequency synchronization input or output SW PARALLEL, SW4 C12 SCLKSET) L4 VOUT4 Power-good flag for Channel 1 output CHANNEL 4 PVIN4 BUCK FB4 (2.5A) COMP4 C13 UVLO, OCP, and TSD protection C11 PGND4 EN4 48-lead, 7 mm 7 mm LFCSP 40C to +125C operational junctional temperature range EXPOSED PAD APPLICATIONS Figure 1. FPGA and processor applications Small cell base stations Security and surveillance Medical applications GENERAL DESCRIPTION The ADP5054 combines four high performance buck regulators in The switching frequency of the ADP5054 can be programmed a 48-lead LFCSP package that meets demanding performance and or synchronized to an external clock from 250 kHz to 2 MHz, board space requirements. The device enables direct connection and an individual frequency configuration is available for to high input voltages of up to 15.5 V with no preregulators. each channel. Channel 1 and Channel 2 integrate high-side power metal-oxide The ADP5054 contains an individual precision enable pin on each channel for easy power-up sequencing. The internal low 1/f noise semiconductor field effect transistors (MOSFETs ) and low-side MOSFET drivers. External NFETs can be used in low-side power reference is implemented in the ADP5054 for noise sensitive devices to achieve an efficiency optimized solution and to applications. deliver a programmable output current of 2 A, 4 A, or 6 A. Table 1. Related Products Combining Channel 1 and Channel 2 in a parallel configuration 2 Model Channels IC Package provides a single output with up to 12 A of current. ADP5050 Four bucks, one LDO Yes 48-Lead LFCSP Channel 3 and Channel 4 integrate both high-side and low-side ADP5051 Four bucks, supervisory Yes 48-Lead LFCSP MOSFETs to deliver an output current of 2.5 A. Combining ADP5052 Four bucks, one LDO No 48-Lead LFCSP Channel 3 and Channel 4 in a parallel configuration can ADP5053 Four bucks, supervisory No 48-Lead LFCSP provide a single output with up to 5 A of current. ADP5054 Four high current bucks No 48-Lead LFCSP Rev. G 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 20152019 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. SELECTIVE ILIM2 ILIM1 12617-001ADP5054 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Power-Good Function ............................................................... 20 Applications ....................................................................................... 1 Thermal Shutdown .................................................................... 20 Typical Application Circuit ............................................................. 1 Applications Information .............................................................. 21 General Description ......................................................................... 1 ADIsimPower Design Tool ....................................................... 21 Revision History ............................................................................... 3 Programming the Output Voltage ........................................... 21 Detailed Functional Block Diagram .............................................. 4 Voltage Conversion Limitations ............................................... 21 Specif icat ions ..................................................................................... 5 Current-Limit Setting ................................................................ 21 Buck Regulator Specifications .................................................... 6 Soft Start Setting ......................................................................... 22 Absolute Maximum Ratings ............................................................ 8 Inductor Selection ...................................................................... 22 Thermal Resistance ...................................................................... 8 Output Capacitor Selection ....................................................... 22 ESD Caution .................................................................................. 8 Input Capacitor Selection .......................................................... 23 Pin Configuration and Function Descriptions ............................. 9 Low-Side Power Device Selection ............................................ 23 Typical Performance Characteristics ........................................... 11 Programming the UVLO Input ................................................ 23 Theory of Operation ...................................................................... 15 Compensation Components Design ....................................... 24 Buck Regulator Operational Modes ......................................... 15 Power Dissipation....................................................................... 24 Adjustable and Fixed Output Voltage ...................................... 15 Junction Temperature ................................................................ 25 Internal Regulators (VREG and VDD) ................................... 15 Design Examples ............................................................................ 26 Separate Supply Applications .................................................... 16 Setting the Switching Frequency .............................................. 26 Low-Side Device Selection ........................................................ 16 Setting the Output Voltage ........................................................ 26 Bootstrap Circuitry .................................................................... 16 Setting the Current Limit .......................................................... 26 Active Output Discharge Switch .............................................. 16 Selecting the Inductor ................................................................ 26 Precision Enabling ...................................................................... 16 Selecting the Output Capacitor ................................................ 27 Oscillator ..................................................................................... 16 Selecting the Low-Side MOSFET ............................................. 27 Synchronization Input/Output ................................................. 17 Designing the Compensation Network ................................... 27 Soft Start ...................................................................................... 18 Selecting the Soft Start Time..................................................... 27 Parallel Operation....................................................................... 18 Selecting the Input Capacitor ................................................... 27 Startup with Precharged Output .............................................. 19 Printed Circuit Board Layout Recommendations ..................... 28 Current-Limit Protection .......................................................... 19 Typical Application Circuit ........................................................... 29 Frequency Foldback ................................................................... 19 Factory Default Options ............................................................ 30 Pulse Skip in Maximum Duty ................................................... 19 Outline Dimensions ....................................................................... 31 Short-Circuit Protection (SCP) ................................................ 20 Ordering Guide .......................................................................... 31 Latch-Off Protection .................................................................. 20 Undervoltage Lockout (UVLO) ............................................... 20 Rev. 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