ADP1876

Data Sheet

Rev. A | Page 2 of 24

TABLE OF CONTENTS

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

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

Typical Operation Circuit................................................................ 1

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

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

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

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

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

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

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

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

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

Independent Low Dropout Linear Regulator......................... 14

Controller Architecture ............................................................. 14

Input Undervoltage Lockout..................................................... 14

Internal Linear Regulator (VCCO).......................................... 14

Overvoltage Protection.............................................................. 15

Power Good................................................................................. 15

Short-Circuit and Current-Limit Protection.......................... 15

Shutdown Control ...................................................................... 15

Thermal Overload Protection................................................... 16

Applications Information .............................................................. 17

Independent Low Dropout Linear Regulator......................... 17

Setting the Output Voltage of the Controller ......................... 17

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

Setting the Current Limit .......................................................... 17

Accurate Current-Limit Sensing .............................................. 17

Setting the Slope Compensation .............................................. 18

Setting the Current Sense Gain ................................................ 18

Input Capacitor Selection.......................................................... 18

Input Filter .................................................................................. 19

Boost Capacitor Selection ......................................................... 19

Inductor Selection ...................................................................... 19

Output Capacitor Selection....................................................... 19

MOSFET Selection..................................................................... 20

Loop Compensation .................................................................. 21

Switching Noise and Overshoot Reduction............................ 22

PCB Layout Guideline ............................................................... 23

Typical Applications Circuit ..................................................... 23

Packaging and Ordering Information ......................................... 24

Outline Dimensions................................................................... 24

Ordering Guide .......................................................................... 24

REVISION HISTORY

11/11—Rev. 0 to Rev. A

Added Evaluation Board to Ordering Guide.............................. 24

9/11—Revision 0: Initial Version