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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 V BUS = 3.0 V to 5.5 V Condition to V IL and V IH , 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 V VCC to V CC Throughout ................................................. 3
Changes to Input Current for 00 Decode, I ADRLOW Parameter......... 3
Changes to Input Current for 11 Decode, I ADRHIGH 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 I 2 C Timing Section...................................... 15
Changes to Quick Command Section ......................................... 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 I 2 C Bus ............................... 15
General I 2 C 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
Changes to Figure 35 ...................................................................... 17
Rev. C | Page 2 of 24
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