LTC3883 Datasheet, PDF (35/112 Pages) Linear Technology – Single Phase Step-Down DC/DC Controller with Digital Power System Management

LTC3883/LTC3883-1
PMBus Command Summary
COMMAND NAME
CMD
CODE DESCRIPTION
DATA
TYPE FORMAT
MFR_PADS
MFR_ADDRESS
0xE5 Digital status of the I/O pads.
0xE6 Sets the 7-bit I²C address byte.
R Word Reg
R/W Byte Reg
MFR_SPECIAL_ID
0xE7 Manufacturer code representing the LTC3883
and revision
R Word Reg
MFR_IIN_CAL_GAIN
0xE8 The resistance value of the input current sense R/W Word L11
element in mΩ.
MFR_FAULT_LOG_STORE 0xEA Command a transfer of the fault log from RAM to Send Byte
EEPROM. This causes the part to behave as if a
channel has faulted off.
MFR_TRIM
0xEB Contact the factory. This command is used for
R Block
CF
diagnostics.
MFR_FAULT_LOG_CLEAR 0xEC Initialize the EEPROM block reserved for fault
logging and clear any previous fault logging
locks.
Send Byte
MFR_READ_IIN_CHAN 0xED Calculated input current based upon READ_IOUT R Word L11
and DUTY_CYCLE.
MFR_FAULT_LOG
0xEE Fault log data bytes. This sequentially retrieved R Block Reg
data is used to assemble a complete fault log.
MFR_COMMON
0xEF Manufacturer status bits that are common across R Byte
Reg
multiple LTC chips.
MFR_COMPARE_USER_ 0xF0 Compares current command contents with NVM. Send Byte
ALL
MFR_TEMPERATURE_2_ 0xF4 Peak internal die temperature since last MFR_
PEAK
CLEAR_PEAKS.
R Word L11
MFR_PWM_CONFIG_
LTC3883
0xF5 Set numerous parameters for the DC/DC
controller including phasing.
R/W Byte Reg
MFR_IOUT_CAL_GAIN_TC 0xF6 Temperature coefficient of the current sensing R/W Word CF
element.
MFR_RVIN
0xF7 The resistance value of the V_IN pin filter element R/W Word L11
in mΩ.
MFR_TEMP_1_GAIN
0xF8 Sets the slope of the external temperature
sensor.
R/W Word CF
MFR_TEMP_1_OFFSET
0xF9 Sets the offset of the external temperature
sensor with respect to –273.1°C
R/W Word L11
MFR_RAIL_ADDRESS
0xFA Common address for PolyPhase outputs to
adjust common parameters.
R/W Byte Reg
MFR_ROM_CRC
0xFC Factory use only.
R Word
I16
MFR_RESET
0xFD Commanded reset without requiring a power
down.
Send Byte
UNITS
mΩ
A
C
mΩ
C
DEFAULT
NVM VALUE PAGE
NA
96
Y
0x4F
65
0x43XX 92
Y
5
77
0xCA80
NA
102
NA
92
NA
105
NA
100
Y
NA
102
NA
96
NA
101
NA
100
Y
0x10
69
Y
3900
74
0x0F3C
Y
3000
71
0x12EE
Y
1.0
78
0x4000
Y
0.0
78
0x8000
Y
0x80
65
NA
92
NA
68
Note 1: Commands indicated with Y indicate that these commands are
stored and restored using the STORE_USER_ALL and RESTORE_USER_
ALL commands, respectively.
Note 2: Commands with a default value of NA indicate “not applicable”.
Commands with a default value of FS indicate “factory set on a per part
basis”.
Note 3: The LTC3883 contains additional commands not listed in this
table. Reading these commands is harmless to the operation of the IC;
however, the contents and meaning of these commands can change
without notice.
Note 4: Some of the unpublished commands are read-only and will
generate a CML bit 6 fault if written.
Note 5: Writing to commands not published in this table is not permitted.
Note 6: The user should not assume compatibility of commands
between different parts based upon command names. Always refer to
the manufacturer’s data sheet for each part for a complete definition of a
command’s function.
LTC has made every reasonable attempt to keep command functionality
compatible between parts; however, differences may occur to address
product requirements.
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