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PMBus COMMAND SUMMARY
Table 7. PMBus Commands Summary (Note: The Data Format Abbreviations are Detailed in Table 8)
CMD
COMMAND NAME
CODE DESCRIPTION
VOUT_MARGIN_LOW
0x26
VOUT_TRANSITION_ RATE
0X27 Rate the output changes when V
FREQUENCY_SWITCH
0x33
VIN_ON
0x35
VIN_OFF
0x36
VOUT_OV_FAULT_LIMIT
0x40
VOUT_OV_FAULT_
0x41
RESPONSE
VOUT_OV_WARN_LIMIT
0x42
VOUT_UV_WARN_LIMIT
0x43
VOUT_UV_FAULT_LIMIT
0x44
VOUT_UV_FAULT_
0x45
RESPONSE
IOUT_OC_FAULT_LIMIT
0x46
IOUT_OC_FAULT_ RESPONSE
0x47
IOUT_OC_WARN_LIMIT
0x4A Output overcurrent warning limit.
OT_FAULT_LIMIT
0x4F
OT_FAULT_RESPONSE
0x50
OT_WARN_LIMIT
0x51
UT_FAULT_LIMIT
0x53
UT_FAULT_RESPONSE
0x54
VIN_OV_FAULT_LIMIT
0x55
VIN_OV_FAULT_ RESPONSE
0x56
VIN_UV_WARN_LIMIT
0x58
IIN_OC_WARN_LIMIT
0x5D Input supply overcurrent warning limit.
Margin low output voltage set point. Must
be less than VOUT_COMMAND.
OUT
commanded to a new value.
Switching frequency of the controller.
Input voltage at which the unit should start
power conversion.
Input voltage at which the unit should stop
power conversion.
Output overvoltage fault limit.
Action to be taken by the device when an
output overvoltage fault is detected.
Output overvoltage warning limit.
Output undervoltage warning limit.
Output undervoltage fault limit.
Action to be taken by the device when an
output undervoltage fault is detected.
Output overcurrent fault limit.
Action to be taken by the device when an
output overcurrent fault is detected.
External overtemperature fault limit.
Action to be taken by the device when an
external overtemperature fault is detected,
External overtemperature warning limit.
External undertemperature fault limit.
Action to be taken by the device when
an external undertemperature fault is
detected.
Input supply overvoltage fault limit.
Action to be taken by the device when an
input overvoltage fault is detected.
Input supply undervoltage warning limit.
For more information
DATA
TYPE
PAGED
FORMAT UNITS NVM
R/W Word
Y
L16
R/W Word
Y
L11
R/W Word
N
L11
R/W Word
N
L11
R/W Word
N
L11
R/W Word
Y
L16
R/W Byte
Y
Reg
R/W Word
Y
L16
R/W Word
Y
L16
R/W Word
Y
L16
R/W Byte
Y
Reg
R/W Word
Y
L11
R/W Byte
Y
Reg
R/W Word
Y
L11
R/W Word
Y
L11
R/W Byte
Y
Reg
R/W Word
Y
L11
R/W Word
Y
L11
R/W Byte
Y
Reg
R/W Word
N
L11
R/W Byte
Y
Reg
R/W Word
N
L11
R/W Word
N
L11
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LTM4700
DEFAULT
VALUE
PAGE
V
Y
0.95
87
0x0F33
V/ms
Y
0.25
93
0xAA00
kHz
Y
350k
84
0xFABC
V
Y
4.75
85
0xCA60
V
Y
4.5
85
0xCA40
V
Y
1.1
86
0x119A
Y
0xB8
95
V
Y
1.075
86
0x1133
V
Y
0.925
87
0x0ECD
V
Y
0.9
87
0x0E66
Y
0xB8
96
A
Y
65
89
0xEA08
Y
0x00
98
A
Y
55.0
90
0xE370
C
Y
128
91
0xF200
Y
0xB8
100
C
Y
125.0
91
0xEBE8
C
Y
–45
92
0xE530
Y
0xB8
100
V
Y
15.5
84
0xD3E0
Y
0x80
95
V
Y
4.65
85
0xCA53
A
Y
20.0
90
0xDA80
Rev. B
45
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