ADPL76030 datasheet(2/40 Pages) AD

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Data Sheet

ADPL76030

analog.com

Rev.0

2 of 40

TABLE OF CONTENTS

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

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

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

TYPICAL APpLICATION............................................................1

Specifications..........................................................................3

Absolute Maximum Ratings ...................................................9

Thermal Resistance............................................................9

Electrostatic Discharge (ESD)............................................9

ESD Caution........................................................................9

Pin Configurations and Function Descriptions...................10

BLOCK DIAGRAM ...................................................................13

Typical Performance Characteristics ..................................14

Theory of Operation .............................................................19

Power Switch Control ......................................................19

(1) Peak-Buck in Buck Region (VIN >> VOUT) ......................20

(2) Peak-Buck in Buck-Boost Region (VIN ~> VOUT)...........20

(3) Peak-Boost in Buck-Boost Region (VIN)<~VOUT ...........21

(4) Peak-Boost in Boost Region (VIN << VOUT) ...................21

Main Control Loop............................................................22

Light Load Current Operation .........................................22

Internal Charge Path ........................................................22

Shutdown and Power-On-Reset......................................23

Start-Up and Fault Protection.........................................23

Applications Information .....................................................25

Switching Frequency Selection.......................................25

Switching Frequency Setting......................................25

Spread Spectrum Frequency Modulation .................25

Frequency Synchronization........................................26

Inductor Selection ...........................................................26

RSENSE Selection and Maximum Output Current .............27

Power MOSFET Selection ................................................28

Optional Schottky Diode (DB, DD) Selection ...................30

CIN and COUT Selection.......................................................30

Input Capacitance CIN ......................................................30

Output Capacitance COUT .................................................30

INTVCC Regulator ..............................................................31

Top Gate MOSFET Driver Supply (CBST1, CBST2).................31

Programming VIN UVLO....................................................31

Programming Input or Output Current Limit.................32

ISMON Current Monitor ...................................................33

Programming Output Voltage and Thresholds..............34

Power GOOD (PGOOD) Pin ..............................................34

Soft-Start and Short-Circuit Protection.....................34

Loop Compensation....................................................35

Efficiency Considerations ...........................................35

PC Board Layout Checklist..........................................36

ORDERING INFORMATION....................................................37

TYPICAL APPLICATION .........................................................38

PACKAGE DESCRIPTION.......................................................39

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