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LTM4700
PMBus COMMAND SUMMARY
Table 7. PMBus Commands Summary (Note: The Data Format Abbreviations are Detailed in Table 8)
CMD
COMMAND NAME
CODE DESCRIPTION
TON_DELAY
0x60
TON_RISE
0x61
TON_MAX_FAULT_LIMIT
0x62
TON_MAX_FAULT_
0x63
RESPONSE
TOFF_DELAY
0x64
TOFF_FALL
0x65
TOFF_MAX_WARN_ LIMIT
0x66
STATUS_BYTE
0x78
STATUS_WORD
0x79
STATUS_VOUT
0x7A Output voltage fault and warning status.
STATUS_IOUT
0x7B Output current fault and warning status.
STATUS_INPUT
0x7C Input supply fault and warning status.
STATUS_TEMPERATURE
0x7D External temperature fault and warning
STATUS_CML
0x7E
STATUS_MFR_SPECIFIC
0x80
READ_VIN
0x88
READ_IIN
0x89
READ_VOUT
0x8B Measured output voltage.
READ_IOUT
0x8C Measured output current.
READ_TEMPERATURE_1
0x8D External temperature sensor temperature.
READ_TEMPERATURE_2
0x8E
READ_FREQUENCY
0x95
READ_POUT
0x96
READ_PIN
0x97
PMBus_REVISION
0x98
46
Time from RUN and/or Operation on to
output rail turn-on.
Time from when the output starts to rise
until the output voltage reaches the V
commanded value.
Maximum time from the start of TON_
RISE for VO
to cross the VOUT_UV_
UT
FAULT_LIMIT.
Action to be taken by the device when a
TON_ MAX_FAULT event is detected.
Time from RUN and/or Operation off to the
start of TOFF_FALL ramp.
Time from when the output starts to fall
until the output reaches zero volts.
Maximum allowed time, after TOFF_FALL
completed, for the unit to decay below
12.5%.
One byte summary of the unit's fault
condition.
Two byte summary of the unit's fault
condition.
status for READ_TEMERATURE_1.
Communication and memory fault and
warning status.
Manufacturer specific fault and state
information.
Measured input supply voltage.
Measured input supply current.
This is the value used for all temperature
related processing, including IOUT_CAL_
GAIN.
Internal die junction temperature. Does
not affect any other commands.
Measured PWM switching frequency.
Measured output power
Calculated input power
PMBus revision supported by this device.
Current revision is 1.2.
For more information
DATA
TYPE
PAGED
FORMAT UNITS NVM
R/W Word
Y
R/W Word
Y
OUT
R/W Word
Y
R/W Byte
Y
R/W Word
Y
R/W Word
Y
R/W Word
Y
R/W Byte
Y
R/W Word
Y
R/W Byte
Y
R/W Byte
Y
R/W Byte
N
R/W Byte
Y
R/W Byte
N
R/W Byte
Y
R Word
N
R Word
N
R Word
Y
R Word
Y
R Word
Y
R Word
N
R Word
Y
R Word
Y
R Word
Y
R Byte
N
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DEFAULT
VALUE
L11
ms
Y
0.0
0x8000
L11
ms
Y
8.0
0xD200
L11
ms
Y
10.00
0xD280
Reg
Y
0xB8
L11
ms
Y
0.0
0x8000
L11
ms
Y
8.00
0xD200
L11
ms
Y
150.0
0xF258
Reg
NA
Reg
NA
Reg
NA
Reg
NA
Reg
NA
Reg
NA
Reg
NA
Reg
NA
L11
V
NA
L11
A
NA
L16
V
NA
L11
A
NA
L11
C
NA
L11
C
NA
L11
Hz
NA
L11
W
N/A
L11
W
N/A
Reg
0x22
PAGE
92
92
93
98
93
93
94
106
107
107
108
108
109
109
110
112
112
112
112
112
112
112
112
113
104
Rev. B
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