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ADM1175

Hot Swap Controller and Digital Power Monitor with Convert Pin

Analog Devices 

ADM1175

TABLE OF CONTENTS

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

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

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

Functional Block Diagram .............................................................. 1

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

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

Absolute Maximum Ratings............................................................ 5

Thermal Characteristics .............................................................. 5

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

Pin Configuration and Function Descriptions............................. 6

Typical Performance Characteristics ............................................. 7

Overview of the Hot Swap Function............................................ 12

Undervoltage Lockout ............................................................... 12

ON/ONB Function..................................................................... 12

TIMER Function ........................................................................ 12

GATE and TIMER Functions During a Hot Swap

Operation..................................................................................... 13

Calculating Current Limits and Fault Current Limit Time .. 13

REVISION HISTORY

5/12—Rev. B to Rev. C

Added VBUS = 3.0 V to 5.5 V Condition to VIL and VIH, Table 1.....4

Changes to Kelvin Sense Resistor Connection Section ............. 22

Deleted Figure 46............................................................................ 23

Updated Outline Dimensions ....................................................... 23

2/08—Rev. A to Rev. B

Changed VVCC to VCC Throughout ................................................. 3

Changes to Input Current for 00 Decode, IADRLOW Parameter......... 3

Changes to Input Current for 11 Decode, IADRHIGH Parameter........ 3

Added ADC Conversion Time Parameter .................................... 4

Added Fast Overcurrent Response Time Parameter ................... 4

Added Endnote 2 and Endnote 3 ................................................... 4

Changes to Figure 14........................................................................ 8

Changes to Figure 15 Caption......................................................... 8

Changes to Figure 24...................................................................... 10

Changes to TIMER Function Section.......................................... 12

Changes to Table 5.......................................................................... 15

Changes to General I2C Timing Section...................................... 15

Changes to Quick Command Section ......................................... 17

Changes to Figure 35...................................................................... 17

Data Sheet

Initial Timing Cycle ................................................................... 13

Hot Swap Retry Cycle on the ADM1175-1 and the

ADM1175-3 ................................................................................ 14

Voltage and Current Readback ..................................................... 15

Serial Bus Interface..................................................................... 15

Identifying the ADM1175 on the I2C Bus............................... 15

General I2C Timing .................................................................... 15

Write and Read Operations........................................................... 17

Quick Command........................................................................ 17

Write Command Byte ................................................................ 17

Write Extended Command Byte .............................................. 18

Read Voltage and/or Current Data Bytes ................................ 19

Applications Information .............................................................. 21

Applications Waveforms............................................................ 21

Kelvin Sense Resistor Connection ........................................... 21

Outline Dimensions ....................................................................... 22

Ordering Guide .......................................................................... 22

Changes to Table 7.......................................................................... 17

Changes to Write Extended Command Byte Section................ 18

Changes to Figure 37...................................................................... 18

Changes to Table 9 and Table 11 .................................................. 18

Changes to Converting ADC Codes to Voltage and

Current Readings Section.............................................................. 19

4/07—Rev. 0 to Rev. A

Changes to Table 4.............................................................................7

Changes to GATE and TIMER Functions During

a Hot Swap Section......................................................................... 14

Changes to Calculating Current Limits and

Fault Current Limit Time Section ................................................ 14

Changes to Initial Timing Cycle Section..................................... 14

Changes to Table 5.......................................................................... 16

Changes to Figure 32 and Figure 33............................................. 17

Changes to Figure 37...................................................................... 19

Changes to Figure 39 and Figure 40............................................. 20

Added Applications Information Heading ................................. 22

9/06—Revision 0: Initial Version

Rev. C | Page 2 of 24

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