ADP5056

Data Sheet

Rev. 0 | Page 2 of 31

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

Typical Application Circuit ............................................................. 1

General Description......................................................................... 1

Revision History ............................................................................... 2

Functional Block Diagram .............................................................. 3

Specifications..................................................................................... 4

Buck Regulator Specifications .................................................... 5

Absolute Maximum Ratings............................................................ 7

Thermal Resistance ...................................................................... 7

ESD Caution.................................................................................. 7

Pin Configuration and Function Descriptions............................. 8

Typical Performance Characteristics ........................................... 10

Theory of Operation ...................................................................... 14

Buck Regulator Operational Modes......................................... 14

Adjustable Output Voltages....................................................... 14

Internal Regulators (VREG) ..................................................... 14

Separate Supply Applications.................................................... 14

Bootstrap Circuitry .................................................................... 15

Active Output Discharge Switch .............................................. 15

Precision Enabling...................................................................... 15

Sequence Mode........................................................................... 15

Oscillator ..................................................................................... 16

Synchronization Input/Output ................................................. 16

Soft Start ...................................................................................... 17

Function Configurations (CFG1 and CFG2) ......................... 17

Parallel Operation....................................................................... 18

Fast Transient Mode................................................................... 19

Startup with Precharged Output .............................................. 19

Current-Limit Protection .......................................................... 19

UVLO........................................................................................... 20

Power-Good Function............................................................... 20

Power-Up at High Temperature ............................................... 20

Thermal Shutdown .................................................................... 20

Applications Information .............................................................. 21

Programming the Adjustable Output Voltage........................ 21

Voltage Conversion Limitations............................................... 21

Current-Limit Setting ................................................................ 21

Soft Start Setting......................................................................... 21

Inductor Selection...................................................................... 21

Output Capacitor Selection....................................................... 22

Input Capacitor Selection.......................................................... 22

Programming the UVLO Input................................................ 23

Slope Compensation Setting..................................................... 23

Compensation Components Design ....................................... 23

Power Dissipation....................................................................... 24

Junction Temperature................................................................ 24

Typical Application Circuits ..................................................... 25

Design Example.............................................................................. 28

Setting the Switching Frequency.............................................. 28

Setting the Output Voltage........................................................ 28

Setting the Configurations (CFG1 and CFG2) .......................... 28

Selecting the Inductor................................................................ 28

Selecting the Output Capacitor ................................................ 29

Designing the Compensation Network................................... 29

Selecting the Input Capacitor ................................................... 29

Circuit Board Layout Recommendations ................................... 30

Outline Dimensions....................................................................... 31

Ordering Guide .......................................................................... 31

REVISION HISTORY

5/2020—Revision 0: Initial Version