LTC3883 Datasheet, PDF (92/112 Pages) Linear Technology – Single Phase Step-Down DC/DC Controller with Digital Power System Management

LTC3883/LTC3883-1
PMBus Command Details
MFR_MODEL
The MFR_MODEL command indicates the manufacturer’s part number of the LTC3883 using ASCII characters.
This read-only command is in block format.
MFR_REVISION
The MFR_REVISION command indicates the manufacturer’s revision number of the LTC3883 using ASCII characters.
This field is limited to a maximum of five characters.
This read-only command is in block format.
MFR_ROM_CRC
This device performs a 16-bit CCITT CRC calculation of the internal ROM upon power-up or reset of the device. The
result of this operation may be reviewed by the user. A non-zero value should not be construed as a ROM failure. The
device manufacturer reserves the right to make modifications to the ROM.
This read-only command has two data bytes.
MFR_SPECIAL_ID
The 16-bit word representing the part name and revision. 0x43 denotes the part is an LTC3883, XX is adjustable by
the manufacturer.
This read-only command has two data bytes.
MFR_TRIM
The MFR_TRIM block read command provides access to factory trim bits. The meaning of these bits is confidential
and proprietary to LTC. This will provide a means of field examination of an individual part’s trim contents. This block
command length fixed of five bytes.
This read-only command is in block format.
Fault Warning and Status
COMMAND NAME
CLEAR_FAULTS
MFR_CLEAR_PEAKS
STATUS_BYTE
STATUS_WORD
STATUS_VOUT
STATUS_IOUT
STATUS_INPUT
STATUS_ TEMPERATURE
STATUS_CML
STATUS_MFR_ SPECIFIC
MFR_PADS
MFR_COMMON
CMD CODE DESCRIPTION
TYPE
0x03 Clear any fault bits that have been set.
Send Byte
0xE3 Clears all peak values.
Send Byte
0x78 One byte summary of the unit’s fault
condition.
R/W Byte
0x79 Two byte summary of the unit’s fault condition. R/W Word
0x7A Output voltage fault and warning status.
R/W Byte
0x7B Output current fault and warning status.
R/W Byte
0x7C Input supply fault and warning status.
R/W Byte
0x7D External temperature fault and warning status R/W Byte
for READ_TEMERATURE_1.
0x7E Communication and memory fault and
warning status.
R/W Byte
0x80 Manufacturer specific fault and state
information.
R/W Byte
0xE5 Digital status of the I/O pads.
R Word
0xEF Manufacturer status bits that are common
across multiple LTC chips.
R Byte
FORMAT
Reg
Reg
Reg
Reg
Reg
Reg
Reg
Reg
Reg
Reg
UNITS
92
DEFAULT
NVM
VALUE
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
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