LTC3882_15 Datasheet, PDF (76/104 Pages) Linear Technology – Dual Output PolyPhase Step-Down DC/DC Voltage Mode Controller with Digital Power System Management

LTC3882
PMBus COMMAND DETAILS (Output Voltage and Limits)
OUTPUT VOLTAGE AND LIMITS
COMMAND NAME
VOUT_MODE
CMD
CODE DESCRIPTION
0x20 Output voltage format and exponent.
TYPE
R Byte
DATA
PAGED FORMAT UNITS NVM
Y
Reg
DEFAULT
VALUE
2^–12
0x14
VOUT_COMMAND
0x21 Nominal V_OUT value.
R/W Word Y
L16
V
l
1.0V
0x1000
MFR_VOUT_MAX
0xA5 Maximum value of any V_OUT-related
command.
R Word Y
L16
V
l
5.6V
0x599A
VOUT_MAX
0x24 Maximum V_OUT that can be set by any
command, including margin.
R/W Word Y
L16
V
l
5.5V
0x5800
MFR_VOUT_AVP
0xD3 Specify V_OUT load line.
R/W Word Y
L11
%l
0%
0x8000
VOUT_MARGIN_HIGH
0x25 V_OUT at high margin, must be greater than R/W Word Y
L16
VOUT_COMMAND.
V l 1.05V
0x10CD
VOUT_MARGIN_LOW
0x26 V_OUT at low margin, must be less than
VOUT_COMMAND.
R/W Word Y
L16
V l 0.95V
0x0F33
VOUT_OV_FAULT_LIMIT
0x40 V_OUT overvoltage fault limit.
R/W Word Y
L16
V
l
1.1V
0x119A
VOUT_OV_WARN_LIMIT
0x42 V_OUT overvoltage warning limit.
R/W Word Y
L16
V l 1.075V
0x1133
VOUT_UV_WARN_LIMIT
0x43 V_OUT undervoltage warning limit.
R/W Word Y
L16
V l 0.925V
0x0ECD
VOUT_UV_FAULT_LIMIT
0x44 V_OUT undervoltage fault limit.
R/W Word Y
L16
V
l
0.9V
0x0E66
Related commands: OPERATION, STATUS_WORD, STATUS_VOUT, SMBALERT_MASK, READ_VOUT, MFR_VOUT_PEAK, READ_POUT, VOUT_OV_FAULT_
RESPONSE, VOUT_UV_FAULT_RESPONSE
VOUT_MODE
The VOUT_MODE command gives the format used by the LTC3882 for output voltage related commands. Only Linear
Mode is supported, with a mantissa expressed in microvolts. Sending the VOUT_MODE command to the LTC3882
using a write protocol will result in a CML fault.
This read-only command has one data byte.
VOUT_COMMAND
The VOUT_COMMAND is used to set the output voltage in volts (no load value if AVP is enabled). Execution of this
command is delayed until any on-going TON_RISE or TOFF_FALL output sequencing is completed, otherwise the
output voltage moves to a new value at VOUT_TRANSITION_RATE.
This command has two data bytes in Linear_16u format.
MFR_VOUT_MAX
The MFR_VOUT_MAX command returns the maximum value, in volts, allowed for any V_OUT-related command, in-
cluding VOUT_OV_FAULT_LIMIT. This value represents the maximum regulated voltage the selected channel could be
capable of producing.
This read-only command has two data bytes in Linear_16u format.
3882f
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For more information www.linear.com/LTC3882