Datasheet

LTC3880/LTC3880-1
34
3880fc
For more information www.linear.com/LTC3880
PMBus COMMAND SUMMARY
COMMAND NAME
CMD
CODE DESCRIPTION TYPE PAGED
DATA
FORMAT UNITS NVM
DEFAULT
VALUE PAGE
POWER_GOOD_OFF 0x5F Output voltage at or below which a power good
should be de-asserted.
R/W Word Y L16 V Y 0.92
0x0EB8
73
TON_DELAY 0x60 Time from RUN and/or Operation on to output
rail turn-on.
R/W Word Y L11 ms Y 0.0
0x8000
78
TON_RISE 0x61 Time from when the output starts to rise until the
output voltage reaches the VOUT commanded
value.
R/W Word Y L11 ms Y 8.0
0xD200
78
TON_MAX_FAULT_LIMIT 0x62 Maximum time from V
OUT_EN
on for VOUT to
cross the VOUT_UV_FAULT_LIMIT.
R/W Word Y L11 ms Y 10.00
0xD280
78
TON_MAX_FAULT_
RESPONSE
0x63 Action to be taken by the device when a
TON_MAX_FAULT event is detected.
R/W Byte Y Reg Y 0xB8
83
TOFF_DELAY 0x64 Time from RUN and/or Operation off to the start
of TOFF_FALL ramp.
R/W Word Y L11 ms Y 0.0
0x8000
79
TOFF_FALL 0x65 Time from when the output starts to fall until the
output reaches zero volts.
R/W Word Y L11 ms Y 8.00
0xD200
79
TOFF_MAX_WARN_LIMIT 0x66 Maximum allowed time, after TOFF_FALL
completed, for the unit to decay below 12.5%.
R/W Word Y L11 ms Y 150
0xF258
79
STATUS_BYTE 0x78 One byte summary of the unit’s fault condition. R/W Byte Y Reg NA
92
STATUS_WORD 0x79 Two byte summary of the unit’s fault condition. R/W Word Y Reg NA
92
STATUS_VOUT 0x7A Output voltage fault and warning status. R/W Byte Y Reg NA
93
STATUS_IOUT 0x7B Output current fault and warning status. R/W Byte Y Reg NA
93
STATUS_INPUT 0x7C Input supply fault and warning status. R/W Byte N Reg NA
94
STATUS_TEMPERATURE 0x7D External temperature fault and warning status for
READ_TEMERATURE_1.
R/W Byte Y Reg NA
94
STATUS_CML 0x7E Communication and memory fault and warning
status.
R/W Byte N Reg NA
95
STATUS_MFR_SPECIFIC 0x80 Manufacturer specific fault and state information. R/W Byte Y Reg NA
95
READ_VIN 0x88 Measured input supply voltage. R Word N L11 V NA
98
READ_IIN 0x89 Measured input supply current. R Word N L11 A NA
98
READ_VOUT 0x8B Measured output voltage. R Word Y L16 V NA
98
READ_IOUT 0x8C Measured output current. R Word Y L11 A NA
99
READ_TEMPERATURE_1 0x8D External diode junction temperature. This is the
value used for all temperature related processing,
including IOUT_CAL_GAIN.
R Word Y L11 C NA
99
READ_TEMPERATURE_2 0x8E Internal junction temperature. Does not affect
any other registers.
R Word N L11 C NA
99
READ_DUTY_CYCLE 0x94 Duty cycle of the top gate control signal. R Word Y L11 % NA
99
READ_POUT 0x96 Measured output power. R Word Y L11 W NA
99
PMBUS_REVISION 0x98 PMBus revision supported by this device.
Current revision is 1.1.
R Byte N Reg 0x11
90
MFR_ID 0x99 The manufacturer ID of the LTC3880 in ASCII. R String N ASC LTC
90
MFR_MODEL 0x9A Manufacturer part number in ASCII. R String N ASC LTC3880
90
MFR_SERIAL 0x9E Serial number of this specific unit. R Block N CF NA
90
MFR_VOUT_MAX 0xA5 Maximum allowed output voltage. R Word Y L16 V 4.096 CH0
5.5 CH1
73
USER_DATA_00 0xB0 OEM RESERVED. Typically used for part
serialization.
R/W Word N Reg Y NA
89