Data Sheet

LT7184S

analog.com

Rev. 0

2 of 52

TABLE OF CONTENTS

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

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

Description ............................................................................................................................................................................................1

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

Revision History ....................................................................................................................................................................................3

Absolute Maximum Ratings ..................................................................................................................................................................4

Thermal Resistance ..........................................................................................................................................................................5

ESD Caution ......................................................................................................................................................................................5

Specifications........................................................................................................................................................................................6

Pin Configurations and Function Descriptions ..................................................................................................................................12

Typical Performance Characteristics .................................................................................................................................................16

Block Diagram .....................................................................................................................................................................................21

Theory of Operation............................................................................................................................................................................22

Overview .........................................................................................................................................................................................22

Switching Regulator Control Loop.................................................................................................................................................23

Soft-Start ........................................................................................................................................................................................23

EEPROM ..........................................................................................................................................................................................23

Power-up and Initialization............................................................................................................................................................24

Shutdown........................................................................................................................................................................................24

Warning and Fault Handling...........................................................................................................................................................25

FAULT PINS .....................................................................................................................................................................................26

PGOOD PINS....................................................................................................................................................................................26

ALERT PIN .......................................................................................................................................................................................26

FAULT Event Logging......................................................................................................................................................................26

Applications Information....................................................................................................................................................................28

Using Resistor Configuration Pins..................................................................................................................................................28

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

Switching Frequency and Phase ....................................................................................................................................................29

PolyPhase Load Sharing.................................................................................................................................................................31

Configuring Device Address with ASEL Pin ....................................................................................................................................33

Operating Frequency Trade-Offs....................................................................................................................................................33

Minimum On-Time and Minimum Off-Time Considerations .........................................................................................................34

PROGRAMMABLE CURRENT LIMIT..................................................................................................................................................34

Inductor Selection ..........................................................................................................................................................................35