LT7182S

2

Rev. 0

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TYPICAL APPLICATIONS

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

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

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

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

Absolute Maximum Ratings..................................................................................................... 3

Order Information................................................................................................................. 3

Pin Configuration ................................................................................................................. 3

Electrical Characteristics........................................................................................................ 4

Typical Performance Characteristics .......................................................................................... 8

Pin Functions .....................................................................................................................11

Block Diagram....................................................................................................................14

Operation..........................................................................................................................15

Overview............................................................................................................................................................... 15

Switching Regulator Control Loop........................................................................................................................ 15

Light-Load Current Operation ............................................................................................................................... 16

EEPROM ............................................................................................................................................................... 16

Power-Up and Initialization ................................................................................................................................... 16

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

Shutdown ............................................................................................................................................................. 17

Warning and FAULT Handling................................................................................................................................ 17

Applications Information .......................................................................................................20

Using Resistor Configuration Pins........................................................................................................................ 20

Setting Output Voltage.......................................................................................................................................... 20

Switching Frequency and Phase ........................................................................................................................... 21

Programmable Current Limit ................................................................................................................................ 25

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

Input and Output Capacitors................................................................................................................................. 27

Programmable PWM Control Loop Compensation ............................................................................................... 27

Software-Configurable Sequencing....................................................................................................................... 28

Event-Based Sequencing ...................................................................................................................................... 28

LTpowerPlay GUI .................................................................................................................................................. 28

PMBus Command Summary ...................................................................................................29

PMBus/I2C Serial Interface Summary................................................................................................................... 29

Board Layout Considerations ..................................................................................................34

Layout Considerations .......................................................................................................................................... 34

Thermal Considerations........................................................................................................................................ 34

Typical Applications .............................................................................................................35

Package Description ............................................................................................................37

Typical Application ..............................................................................................................38

Related Parts .....................................................................................................................38

commands, serial device address selection, and physical interface details.