LTM4676A_15 Datasheet, PDF (42/130 Pages) Linear Technology – Dual 13A or Single 26A Module Regulator with Digital Power System Management

LTM4676A
PMBus Command Summary
Table 1. Summary of Supported Commands and Feature Differences Between the LTM4676A and the LTM4676 (Items of Greatest
Significance Indicated by Gray-Shaded Cells; Common Commands, Values and Attributes Indicated by Non-Shaded, Merged Cells)
PMBus COMMAND CMD CODE COMMAND OR FEATURE
NAME, OR FEATURE (REGISTER) DESCRIPTION
LTM4676 NVM FACTORY-
LTM4676A NVM FACTORY-DEFAULT VALUE DEFAULT VALUE AND/OR
AND/OR ATTRIBUTES
ATTRIBUTES
PAGE
TON_MAX_FAULT_ 0x62 Turn-on watchdog timeout fault No difference: 0xCA80 (5ms), read/write, paged, stored in user-editable 99
LIMIT_n
threshold (time permitted for
VOUT_n to reach or exceed VOUT_
UV_FAULT_LIMIT_n after turn-on
command is received).
NVM.
TON_MAX_FAULT_
RESPONSE_n
0x63 Action to be taken by the device No difference: 0xB8 (non-latching shutdown; autonomous restart upon 104
when a TON_MAX_FAULT_n event fault removal), read/write, paged, stored in user-editable NVM.
is detected.
TOFF_DELAY_n
0x64 Time from RUN and/or Operation No difference: 0x8000 (0ms), read/write, paged, stored in user-editable 100
off to the start of TOFF_FALL_n
ramp.
NVM.
TOFF_FALL_n
0x65 Time from when the output
No difference: 0xC300 (3ms), read/write, paged, stored in user-editable 100
voltage reference starts to fall until NVM.
it reaches 0V.
TOFF_MAX_WARN_
LIMIT_n
0x66 Turn-off watchdog timeout fault No difference: 0x8000 (no limit; warning is disabled), read/write, paged, 100
threshold (time permitted for
stored in user-editable NVM.
VOUT_n to decay to or below
12.5% of the commanded VOUT_n
value at the time of receiving a
turn-off command).
STATUS_BYTE_n
0x78 One byte summary of the unit’s No difference: default value not applicable, read/write, paged, not stored 113
fault condition.
in NVM.
STATUS_WORD_n
0x79 Two byte summary of the unit’s No difference: default value not applicable, read/write, paged, not stored 113
fault condition.
in NVM.
STATUS_VOUT_n
0x7A Output voltage fault and warning No difference: default value not applicable, read/write, paged, not stored 114
status.
in NVM.
STATUS_IOUT_n
0x7B Output current fault and warning No difference: default value not applicable, read/write, paged, not stored 114
status.
in NVM.
STATUS_INPUT
0x7C Input supply (SV_IN) fault and
No difference: default value not applicable, read/write, non-paged, not
114
warning status.
stored in NVM.
STATUS_
TEMPERATURE_n
STATUS_CML
0x7D TSNS_na-sensed temperature fault No difference: default value not applicable, read/write, paged, not stored 115
and warning status for READ_ in NVM.
TEMERATURE_1_n .
0x7E Communication and memory fault No difference: default value not applicable, read/write, non-paged, not
115
and warning status.
stored in NVM.
STATUS_MFR_
SPECIFIC_n
READ_VIN
0x80 Manufacturer specific fault and No difference: default value not applicable, read/write, paged, not stored 115
state information.
in NVM.
0x88 Measured input supply (SV_IN)
No difference: default value not applicable, read-only, non-paged, not
118
voltage.
stored in NVM.
READ_IIN
0x89 Calculated total input supply
No difference: default value not applicable, read-only, non-paged, not
118
current.
stored in NVM.
READ_VOUT_n
0x8B Measured output voltage.
No difference: default value not applicable, read-only, paged, not stored 118
in NVM.
READ_IOUT_n
0x8C Measured output current.
No difference: default value not applicable, read-only, paged, not stored 119
in NVM.
READ_
TEMPERATURE_1_n
0x8D Measurement of TSNS_{n a}-sensed No difference: default value not applicable, read-only, paged, not stored 119
temperature.
in NVM.
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