Datasheet
ADM1176 Data Sheet
Rev. C | Page 2 of 24
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 6
Thermal Characteristics .............................................................. 6
ESD Caution .................................................................................. 6
Pin Configuration and Function Descriptions ............................. 7
Typical Performance Characteristics ............................................. 8
Overview of the Hot Swap Function ............................................ 13
Undervoltage Lockout ............................................................... 13
ON Function ............................................................................... 13
TIMER Function ........................................................................ 13
GATE and TIMER Functions During a Hot Swap
Operation ..................................................................................... 14
Calculating Current Limits and Fault Current Limit Time .. 14
Initial Timing Cycle ................................................................... 14
Hot Swap Retry on the ADM1176-1 ....................................... 15
Voltage and Current Readback ..................................................... 16
Serial Bus Interface ..................................................................... 16
Identifying the ADM1176 on the I
2
C Bus ............................... 16
General I
2
C Timing .................................................................... 16
Write and Read Operations ........................................................... 18
Quick Command ........................................................................ 18
Write Command Byte ................................................................ 18
Write Extended Command Byte .............................................. 19
Read Voltage and/or Current Data Bytes ................................ 20
Applications Information .............................................................. 22
Applications Waveforms ............................................................ 22
Kelvin Sense Resistor Connection ........................................... 22
Outline Dimensions ....................................................................... 23
Ordering Guide .......................................................................... 23
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 .................................... 5
Added Fast Overcurrent Response Time Parameter ................... 5
Added Endnote 2 and Endnote 3 ................................................... 5
Change to Figure 14 ......................................................................... 9
Changes to Figure 15 Caption ......................................................... 9
Changes to Figure 24 ...................................................................... 11
Changes to TIMER Function Section .......................................... 13
Changes to General I
2
C Timing Section, Step 3 ......................... 16
Changes to Table 5 .......................................................................... 16
Changes to Figure 32 and Figure 33 ............................................. 17
Changes to Quick Command Section ......................................... 18
Changes to Figure 35 ...................................................................... 18
Changes to Table 7 .......................................................................... 18
Changes to Write Extended Command Byte Section ................ 19
Changes to Figure 37 ...................................................................... 19
Changes to Table 9 and Table 11 ................................................... 19
Changes to Converting ADC Codes to Voltage and
Current Readings Section ......................................................... 20
4/07—Rev. 0 to Rev. A
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