LTC3883 Datasheet, PDF (98/112 Pages) Linear Technology – Single Phase Step-Down DC/DC Controller with Digital Power System Management

LTC3883/LTC3883-1
PMBus Command Details
Telemetry
COMMAND NAME
READ_VIN
READ_IIN
READ_VOUT
READ_IOUT
READ_TEMPERATURE_1
READ_TEMPERATURE_2
READ_DUTY_CYCLE
READ_POUT
READ_PIN
MFR_IOUT_PEAK
MFR_VOUT_PEAK
MFR_VIN_PEAK
MFR_TEMPERATURE_1_PEAK
MFR_READ_IIN_CHAN_PEAK
MFR_READ_ICHIP
MFR_READ_IIN_CHAN
MFR_TEMPERATURE_2_PEAK
CMD
CODE
0x88
0x89
0x8B
0x8C
0x8D
0x8E
0x94
0x96
0x97
0xD7
0xDD
0xDE
0xDF
0xE1
0xE4
0xED
0xF4
DESCRIPTION
Measured input supply voltage.
Measured input supply current.
Measured output voltage.
Measured output current.
External diode junction temperature. This is the value
used for all temperature related processing, including
IOUT_CAL_GAIN.
Internal junction temperature. Does not affect any
other commands.
Duty cycle of the top gate control signal.
Calculated output power.
Calculated input power
Report the maximum measured value of READ_IOUT
since last MFR_CLEAR_PEAKS.
Maximum measured value of READ_VOUT since last
MFR_CLEAR_PEAKS.
Maximum measured value of READ_VIN since last
MFR_CLEAR_PEAKS.
Maximum measured value of external Temperature
(READ_TEMPERATURE_1) since last MFR_CLEAR_
PEAKS.
Maximum measured value of READ_IIN command
since last MFR_CLEAR_PEAKS.
Measured current used by the LTC3883
Calculated input supply current based upon
READ_IOUT and DUTY_CYCLE
Peak internal die temperature since last
MFR_CLEAR_PEAKS.
TYPE
R Word
R Word
R Word
R Word
R Word
R Word
R Word
R Word
R Word
R Word
R Word
R Word
R Word
R Word
R Word
R Word
R Word
FORMAT
L11
L11
L16
L11
L11
L11
L11
L11
L11
L11
L16
L11
L11
L11
L11
L11
L11
UNITS
V
A
V
A
C
C
%
W
W
A
V
V
C
A
A
A
C
DEFAULT
NVM VALUE
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
READ_VIN
The READ_VIN command returns the measured V_IN pin voltage, in volts added to READ_ICHIP • MFR_RVIN. This
compensates for the IR voltage drop across the V_IN filter element due to the supply current of the LTC3883.
This read-only command has two data bytes and is formatted in Linear_5s_11s format.
READ_VOUT
The READ_VOUT command returns the measured output voltage in the same format as set by the VOUT_MODE
command.
This read-only command has two data bytes and is formatted in Linear_16u format.
READ_IIN
The READ_IIN command returns the input current, in Amperes, as measured across the input current sense resistor
(see also MFR_IIN_CAL_GAIN).
This read-only command has two data bytes and is formatted in Linear_5s_11s format.
3883f
98