LTC3882_15 Datasheet, PDF (37/104 Pages) Linear Technology – Dual Output PolyPhase Step-Down DC/DC Voltage Mode Controller with Digital Power System Management

LTC3882
PMBus COMMAND SUMMARY
Table 7. PMBus Command Summary
COMMAND NAME
CMD
CODE DESCRIPTION
VOUT_UV_WARN_LIMIT
0x43 V_OUT undervoltage warning limit.
VOUT_UV_FAULT_LIMIT
0x44 V_OUT undervoltage fault limit.
VOUT_UV_FAULT_RESPONSE 0x45 V_OUT undervoltage fault response.
IOUT_OC_FAULT_LIMIT
0x46 Output overcurrent fault limit.
DATA
TYPE PAGED FORMAT UNITS NVM
R/W Word Y
L16
V
l
R/W Word Y
L16
V
l
R/W Byte Y
Reg
l
R/W Word Y
L11
A
l
IOUT_OC_FAULT_RESPONSE 0x47 Output overcurrent fault response.
IOUT_OC_WARN_LIMIT
0x4A Output overcurrent warning limit.
R/W Byte Y
Reg
l
R/W Word Y
L11
A
l
OT_FAULT_LIMIT
0x4F External overtemperature fault limit.
R/W Word Y
L11
°C l
OT_FAULT_RESPONSE
OT_WARN_LIMIT
0x50 External overtemperature fault response. R/W Byte Y
Reg
l
0x51 External overtemperature warning limit. R/W Word Y
L11
°C l
UT_FAULT_LIMIT
0x53 External undertemperature fault limit. R/W Word Y
L11
°C l
UT_FAULT_RESPONSE
VIN_OV_FAULT_LIMIT
0x54 External undertemperature fault
response.
0x55 V_IN overvoltage fault limit.
R/W Byte Y
Reg
R/W Word N
L11
l
V
l
VIN_OV_FAULT_RESPONSE
VIN_UV_WARN_LIMIT
0x56 V_IN overvoltage fault response.
0x58 V_IN undervoltage warning limit.
R/W Byte Y
Reg
R/W Word N
L11
l
V
l
TON_DELAY
0x60 Delay from RUN pin or OPERATION ON R/W Word Y
L11
ms l
command to TON_RISE ramp start.
TON_RISE
0x61 Time for V_OUT to rise from 0.0V to
R/W Word Y
L11
ms l
VOUT_COMMAND after TON_DELAY.
TON_MAX_FAULT_LIMIT
0x62 Maximum time for V_OUT to rise above R/W Word Y
L11
ms l
VOUT_UV_FAULT_LIMIT after
TON_DELAY.
TON_MAX_FAULT_RESPONSE 0x63 Fault response when TON_MAX_FAULT_ R/W Byte Y
Reg
l
LIMIT is exceeded.
TOFF_DELAY
0x64 Delay from RUN pin or OPERATION OFF R/W Word Y
L11
ms l
command to TOFF_FALL ramp start.
TOFF_FALL
0x65 Time for V_OUT to fall to 0.0V from
R/W Word Y
L11
ms l
VOUT_COMMAND after TOFF_DELAY.
TOFF_MAX_WARN_ LIMIT
0x66 Maximum time for V_OUT to decay below R/W Word Y
L11
ms l
12.5% of VOUT_COMMAND after
TOFF_FALL completes.
STATUS_BYTE
0x78 One-byte channel status summary.
R/W Byte Y
Reg
STATUS_WORD
0x79 Two-byte channel status summary.
R/W Word Y
Reg
STATUS_VOUT
STATUS_IOUT
STATUS_INPUT
0x7A V_OUT fault and warning status.
R/W Byte Y
Reg
0x7B I_OUT fault and warning status.
R/W Byte Y
Reg
0x7C Input supply fault and warning status. R/W Byte N
Reg
DEFAULT
VALUE
0.925V
0x0ECD
0.9V
0x0E66
0xB8
29.75A
0xDBB8
0x00
20.0A
0xDA80
100.0°C
0xEB20
0xB8
85.0°C
0xEAA8
–40.0°C
0xE580
0xB8
15.5V
0xD3E0
0x80
6.3V
0xCB26
0.0ms
0x8000
8.0ms
0xD200
10.0ms
0xD280
0xB8
0.0ms
0x8000
8.0ms
0xD200
150ms
0xF258
SEE
PAGE
78
78
92
79
93
79
82
94
82
83
94
75
91
75
80
80
81
95
81
81
81
83
84
84
85
85
For more information www.linear.com/LTC3882
3882f
37