Datasheet

LTC2974
25
2974fc
For more information www.linear.com/LTC2974
Summary Table
COMMAND NAME
CMD
CODE DESCRIPTION TYPE PAGED
DATA
FORMAT UNITS EEPROM
DEFAULT
VALUE:
FLOAT
HEX
REF
PAGE
USER_DATA_03 0xB3 Scratchpad location. R/W Word Y Reg Y 0x00
79
USER_DATA_04 0xB4 Scratchpad location. R/W Word N Reg Y 0x00
79
MFR_LTC_RESERVED_1 0xB5 Manufacturer reserved. R/W Word Y Reg Y NA
79
MFR_T_SELF_HEAT 0xB8 Calculated temperature rise due to
self-heating of output current sense
device above value measured by external
temperature sensor.
R Word Y L11 °C NA
48
MFR_IOUT_CAL_GAIN_TAU_
INV
0xB9 Inverse of time constant for Mfr_t_self_
heat changes scaled by 4 • t
CONV_SENSE
.
R/W Word Y L11 Y 0.0
0x8000
48
MFR_IOUT_CAL_GAIN_THETA 0xBA Thermal resistance from inductor core to
point measured by external temperature
sensor.
R/W Word Y L11 °C/W Y 0.0
0x8000
48
MFR_READ_IOUT 0xBB Alternate data format for READ_IOUT. One
LSB = 2.5mA.
R Word Y CF 2.5mA NA
66
MFR_LTC_RESERVED_2 0xBC Manufacturer reserved. R/W Word Y Reg NA
79
MFR_EE_UNLOCK 0xBD Unlock user EEPROM for access by
MFR_EE_ERASE and MFR_EE_DATA
commands.
R/W Byte N Reg NA
40
MFR_EE_ERASE 0xBE Initialize user EEPROM for bulk
programming by MFR_EE_DATA.
R/W Byte N Reg NA
40
MFR_EE_DATA 0xBF Data transferred to and from EEPROM
using sequential PMBus word reads or
writes. Supports bulk programming.
R/W Word N Reg NA
40
MFR_CONFIG_LTC2974 0xD0 Configuration bits that are channel
specific.
R/W Word Y Reg Y 0x0080
30
MFR_CONFIG_ALL_LTC2974 0xD1 Configuration bits that are common to all
pages.
R/W Word N Reg Y 0x0F7B
30
MFR_FAULTB0_PROPAGATE 0xD2 Configuration that determines if a
channels faulted off state is propagated to
the FAULTB0 pin.
R/W Byte Y Reg Y 0x00
59
MFR_FAULTB1_PROPAGATE 0xD3 Configuration that determines if a
channels faulted off state is propagated to
the FAULTB1 pin.
R/W Byte Y Reg Y 0x00
59
MFR_PWRGD_EN 0xD4 Configuration that maps WDI/RESETB
status and individual channel power good
to the PWRGD pin.
R/W Word N Reg Y 0x0000
52
MFR_FAULTB0_RESPONSE 0xD5 Action to be taken by the device when the
FAULTB0 pin is asserted low.
R/W Byte N Reg Y 0x00
59
MFR_FAULTB1_RESPONSE 0xD6 Action to be taken by the device when the
FAULTB1 pin is asserted low.
R/W Byte N Reg Y 0x00
59
MFR_IOUT_PEAK 0xD7 Maximum measured value of READ_IOUT. R Word Y L11 A NA
66
MFR_IOUT_MIN 0xD8 Minimum measured value of READ_IOUT. R Word Y L11 A NA
66
MFR_CONFIG2_LTC2974 0xD9 Configuration bits that are channel
specific
R/W Byte N Reg Y 0x00
30
pMbus coMManD suMMary