ADP5052ACPZ-R7 datasheet(2/40 Pages) AD

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ADP5052

Data Sheet

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TABLE OF CONTENTS

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

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

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

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

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

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

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

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

LDO Regulator Specifications .................................................... 7

Absolute Maximum Ratings............................................................ 8

Thermal Resistance ...................................................................... 8

ESD Caution.................................................................................. 8

Pin Configuration and Function Descriptions............................. 9

Typical Performance Characteristics ........................................... 11

Theory of Operation ...................................................................... 17

Buck Regulator Operational Modes......................................... 17

Adjustable and Fixed Output Voltages .................................... 17

Internal Regulators (VREG and VDD) ................................... 17

Separate Supply Applications.................................................... 18

Low-Side Device Selection........................................................ 18

Bootstrap Circuitry .................................................................... 18

Active Output Discharge Switch .............................................. 18

Precision Enabling...................................................................... 18

Oscillator ..................................................................................... 18

Synchronization Input/Output ................................................. 19

Soft Start ...................................................................................... 19

Parallel Operation....................................................................... 20

Startup with Precharged Output .............................................. 20

Current-Limit Protection .......................................................... 20

Frequency Foldback ................................................................... 21

Hiccup Protection ...................................................................... 21

Latch-Off Protection.................................................................. 21

Undervoltage Lockout (UVLO) ............................................... 22

Power-Good Function ............................................................... 22

Thermal Shutdown .................................................................... 22

LDO Regulator ........................................................................... 22

Applications Information .............................................................. 23

ADIsimPower Design Tool ....................................................... 23

Programming the Adjustable Output Voltage........................ 23

Voltage Conversion Limitations............................................... 23

Current-Limit Setting ................................................................ 23

Soft Start Setting......................................................................... 24

Inductor Selection ...................................................................... 24

Output Capacitor Selection....................................................... 24

Input Capacitor Selection.......................................................... 25

Low-Side Power Device Selection............................................ 25

Programming the UVLO Input................................................ 25

Compensation Components Design ....................................... 26

Power Dissipation....................................................................... 26

Junction Temperature ................................................................ 27

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

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

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

Setting the Current Limit .......................................................... 28

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

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

Selecting the Low-Side MOSFET............................................. 29

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

Selecting the Soft Start Time..................................................... 29

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

Recommended External Components .................................... 30

Circuit Board Layout Recommendations ................................... 31

Typical Application Circuits ......................................................... 32

Factory Programmable Options................................................... 35

Factory Default Options............................................................ 37

Outline Dimensions....................................................................... 38

Ordering Guide .......................................................................... 38

REVISION HISTORY

5/13—Revision 0: Initial Version

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