Datasheet

LTC2978A
27
2978afa
For more information www.linear.com/LTC2978A
PMBus COMMAND SUMMARY
Summary Table
COMMAND NAME
CMD
CODE DESCRIPTION TYPE PAGED
D
ATA
FORMAT UNITS EEPROM
DEFAULT
VALUE
FLOAT
HEX
REF
PAGE
STATUS_INPUT 0x7C Input voltage fault and warning status
measured at VIN_SNS pin.
R Byte N Reg NA 40
STATUS_TEMPERATURE 0x7D Temperature fault and warning status for
READ_TEMPERATURE_1.
R Byte N Reg NA 40
STATUS_CML 0x7E Communication and memory fault and
warning status.
R Byte N Reg NA 41
STATUS_MFR_SPECIFIC 0x80 Manufacturer specific fault and state
information.
R Byte Y Reg NA 41
READ_VIN 0x88 Input voltage measured at VIN_SNS pin. R Word N L11 V NA 42
READ_VOUT 0x8B DC/DC converter output voltage. R Word Y L16 V NA 42
READ_TEMPERATURE_1 0x8D Internal junction temperature. R Word N L11 °C NA 42
PMBUS_REVISION 0x98 PMBus revision supported by this device.
Current revision is 1.1.
R Byte N Reg 0x11 42
MFR_CONFIG_LT C 2978 0xD0 Configuration bits that are channel
specific.
R/W Word Y Reg Y 0x0080 43
MFR_CONFIG_ALL_LT C 2978 0xD1 Configuration bits that are common to all
pages.
R/W Byte N Reg Y 0x7B 44
MFR_FAULTBz0_PROPAGATE 0xD2 Configuration that determines if a
channel’s faulted off state is propagated
to the FAULTB00 and FAULTB10 pins.
R/W Byte Y
Reg Y 0x00 45
MFR_FAULTBz1_PROP
AGATE 0xD3 Manufacturer configuration that
Configuration that determines if a
channel’s faulted off state is propagated
to the FAULTB01 and FAULTB11 pins.
R/W Byte Y Reg Y 0x00 45
MFR_PWRGD_EN 0xD4 Configuration for mapping PWRGD and
WDI/RESETB status to the PWRGD pin.
R/W Word N Reg Y 0x0000 46
MFR_FAULTB00_RESPONSE 0xD5 Action to be taken by the device when the
FAULTB00 pin is asserted low.
R/W Byte N Reg Y 0x00 47
MFR_FAULTB01_RESPONSE 0xD6 Action to be taken by the device when the
FAULTB01 pin is asserted low.
R/W Byte N Reg Y 0x00 47
MFR_FAULTB10_RESPONSE 0xD7 Action to be taken by the device when the
FAULTB10 pin is asserted low.
R/W Byte N Reg Y 0x00 47
MFR_FAULTB11_RESPONSE 0xD8 Action to be taken by the device when the
FAULTB11 pin is asserted low.
R/W Byte N Reg Y 0x00 47
MFR_VINEN_OV_FAULT_
RESPONSE
0xD9 Action to be taken by the V
IN_EN
pin in
response to a VOUT_OV_FAULT.
R/W Byte N Reg Y 0x00 48
MFR_VINEN_UV_FAULT_
RESPONSE
0xDA Action to be taken by the V
IN_EN
pin in
response to a VOUT_UV_FAULT.
R/W Byte
N Reg Y 0x00 49
MFR_RETRY_DELAY 0xDB Retry interval during FAULT retry mode. R/W Word N L11 ms Y 200.0
0xF320
49
MFR
_RESTART_DELA
Y 0xDC Delay from actual CONTROL active edge
to virtual CONTROL active edge.
R/W Word N L11 ms Y 400.0
0xFB20
50
MFR
_VOUT_PEAK 0xDD
Maximum measured value of READ_
VOUT.
R Word Y L16 V NA 50
MFR_VIN_PEAK 0xDE Maximum measured value of READ_VIN. R Word N L11 V NA 50
MFR_TEMPERATURE_PEAK 0xDF Maximum measured value of READ_
TEMPERATURE_1.
R Word N L11 °C NA 50