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PMBus COMMAND DETAILS
TEMPERATURE
External Temperature Calibration
COMMAND NAME
MFR_TEMP_1_GAIN
MFR_TEMP_1_OFFSET
MFR_TEMP_1_GAIN
The MFR_TEMP_1_GAIN command will modify the slope of the external temperature sensor to account for non-idealities
in the element and errors associated with the remote sensing of the temperature in the inductor.
This command has two data bytes and is formatted in 16-bit 2's complement integer. The effective gain adjustment is
–14
N • 2
. The nominal value is 1.
MFR_TEMP_1_OFFSET
The MFR_TEMP_1_OFFSET command will modify the offset of the external temperature sensor to account for non-
idealities in the element and errors associated with the remote sensing of the temperature in the inductor.
This command has two data bytes and is formatted in Linear_5s_11s format.
External Temperature Limits
COMMAND NAME
CMD CODE DESCRIPTION
OT_FAULT_LIMIT
0x4F
OT_WARN_LIMIT
0x51
UT_FAULT_LIMIT
0x53
OT_FAULT_LIMIT
The OT_FAULT_LIMIT command sets the value of the external sense temperature measured by the ADC, in degrees
Celsius, which causes an overtemperature fault. The READ_TEMPERATURE_1 value will be used to determine if this
limit has been exceeded.
This command has two data bytes and is formatted in Linear_5s_11s format.
OT_WARN_LIMIT
The OT_WARN_LIMIT command sets the value of the external sense temperature measured by the ADC, in degrees
Celsius, which causes an overtemperature warning. The READ_TEMPERATURE_1 value will be used to determine if
this limit has been exceeded.
CMD CODE DESCRIPTION
0xF8
Sets the slope of the external temperature
sensor.
0xF9
Sets the offset of the external temperature
sensor.
External overtemperature fault limit.
External overtemperature warning
limit.
External undertemperature fault limit.
For more information
TYPE
PAGED
R/W Word
Y
R/W Word
Y
DATA
TYPE
PAGED
FORMAT
R/W Word
Y
L11
R/W Word
Y
L11
R/W Word
Y
L11
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LTM4700
DATA
DEFAULT
FORMAT UNITS NVM
VALUE
CF
Y
0.995
0x3FAE
L11
C
Y
0.0
0x8000
DEFAULT
UNITS
NVM
VALUE
C
Y
128
0xF200
C
Y
125
0xEBE8
C
Y
–45
0xE530
Rev. B
91
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