LTC3883 Datasheet, PDF (33/112 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
TON_RISE
0x61 Time from when the output starts to rise until the R/W Word L11
output voltage reaches the VOUT commanded
value.
TON_MAX_FAULT_LIMIT 0x62 Maximum time from V_{OUT_EN} on for VOUT to
cross the VOUT_UV_FAULT_LIMIT.
R/W Word L11
TON_MAX_FAULT_
RESPONSE
0x63 Action to be taken by the device when a TON_
MAX_FAULT event is detected.
R/W Byte Reg
TOFF_DELAY
0x64 Time from RUN and/or Operation off to the start R/W Word L11
of TOFF_FALL ramp.
TOFF_FALL
0x65 Time from when the output starts to fall until the R/W Word L11
output reaches zero volts.
TOFF_MAX_WARN_LIMIT 0x66 Maximum allowed time, after TOFF_FALL
completed, for the unit to decay below 12.5%.
R/W Word L11
STATUS_BYTE
0x78 One byte summary of the unit’s fault condition. R/W Byte Reg
STATUS_WORD
0x79 Two byte summary of the unit’s fault condition. R/W Word Reg
STATUS_VOUT
0x7A Output voltage fault and warning status.
R/W Byte Reg
STATUS_IOUT
0x7B Output current fault and warning status.
R/W Byte Reg
STATUS_INPUT
0x7C Input supply fault and warning status.
R/W Byte Reg
STATUS_TEMPERATURE 0x7D External temperature fault and warning status for R/W Byte Reg
READ_TEMERATURE_1.
STATUS_CML
0x7E Communication and memory fault and warning R/W Byte Reg
status.
STATUS_MFR_SPECIFIC 0x80 Manufacturer specific fault and state information. R/W Byte Reg
READ_VIN
0x88 Measured input supply voltage.
R Word L11
READ_IIN
0x89 Measured input supply current.
R Word L11
READ_VOUT
0x8B Measured output voltage.
R Word L16
READ_IOUT
0x8C Measured output current.
R Word L11
READ_TEMPERATURE_1 0x8D External diode junction temperature. This is the R Word L11
value used for all temperature related processing,
including IOUT_CAL_GAIN.
READ_TEMPERATURE_2 0x8E Internal junction temperature. Does not affect
any other commands.
R Word L11
READ_DUTY_CYCLE
0x94 Duty cycle of the top gate control signal.
R Word L11
READ_POUT
0x96 Calculated output power.
R Word L11
READ_PIN
0x97 Calculated input power
R Word L11
PMBUS_REVISION
0x98 PMBus revision supported by this device.
Current revision is 1.1.
R Byte
Reg
MFR_ID
0x99 The manufacturer ID of the LTC3883 in ASCII.
R String ASC
MFR_MODEL
0x9A Manufacturer part number in ASCII.
R String ASC
MFR_REVISION
0x9B Manufacturer part revision in ASCII.
R String ASC
MFR_LOCATION
0x9C Location of the final test of the LTC3883 in
ASCII.
R String ASC
MFR_DATE
0x9D Date of the final test of the IC YYMMDD in ASCII. R String ASC
MFR_VOUT_MAX
0xA5 Maximum allowed output voltage.
R Word L16
UNITS
ms
ms
ms
ms
ms
V
A
V
A
C
C
%
W
W
V
USER_DATA_00
0xB0 OEM RESERVED. Typically used for part
serialization.
R/W Word Reg
DEFAULT
NVM VALUE PAGE
Y
8.0
80
0xD200
Y
10.00
80
0xD280
Y
0xB8
85
Y
0.0
81
0x8000
Y
8.00
81
0xD200
Y
150
81
0xF258
NA
93
NA
93
NA
94
NA
94
NA
94
NA
94
NA
95
NA
95
NA
98
NA
98
NA
98
NA
99
NA
99
NA
99
NA
99
NA
99
NA
99
FS
0x11
91
LTC
91
LTC3883 92
FS
NA
92
FS
NA
91
FS
NA
91
5.5
74
0x5800
Y
NA
90
3883f
33