Datasheet

LTC3883/LTC3883-1
71
3883fa
For more information www.linear.com/LTC3883
VIN_ON
The VIN_ON command sets the input voltage, in volts, at which the unit should start power conversion.
This command has two data bytes and is formatted in Linear_5s_11s format.
VIN_OFF
The VIN_OFF command sets the input voltage, in volts, at which the unit should stop power conversion.
This command has two data bytes and is formatted in Linear_5s_11s format.
MFR_RVIN
The MFR_RVIN command is used to set the resistance value of the V
IN
pin filter element in milliohms. (See also
READ_VIN). Set MFR_RVIN equal to 0 if no filter element is used.
This command has two data bytes and is formatted in Linear_5s_11s format.
Output Voltage and Limits
COMMAND NAME CMD CODE DESCRIPTION TYPE
DATA
FORMAT UNITS NVM
DEFAULT
VALUE
VOUT_MODE 0x20 Output voltage format and exponent (2
–12
). R Byte Reg 2
–12
0x14
VOUT_MAX 0x24
Upper limit on the output voltage the unit can
command regardless of any other commands.
R/W Word L16 V Y 5.5
0x5800
VOUT_OV_FAULT_ LIMIT
0x40 Output overvoltage fault limit. R/W Word L16 V Y 1.1
0x119A
VOUT_OV_WARN_ LIMIT 0x42 Output overvoltage warning limit. R/W Word L16 V Y 1.075
0x1133
VOUT_MARGIN_HIGH 0x25 Margin high output voltage set point. Must be
greater than VOUT_COMMAND.
R/W Word L16 V Y 1.05
0x10CD
VOUT_COMMAND 0x21 Nominal output voltage set point. R/W Word L16 V Y 1.0
0x1000
VOUT_MARGIN_LOW 0x26 Margin low output voltage set point. Must be
less than VOUT_COMMAND.
R/W Word L16 V Y 0.95
0x0F33
VOUT_UV_WARN_ LIMIT 0x43 Output undervoltage warning limit. R/W Word L16 V Y 0.925
0x0ECD
VOUT_UV_FAULT_ LIMIT 0x44 Output undervoltage fault limit. R/W Word L16 V Y 0.9
0x0E66
POWER_GOOD_ON 0x5E Output voltage at or above which a power
good should be asserted.
R/W Word L16 V Y 0.93
0x0EE1
POWER_GOOD_
OFF 0x5F
Output voltage at or below which a power
good should be de-asserted.
R/W Word L16 V Y 0.92
0x0EB8
MFR_VOUT_MAX 0xA5 Maximum allowed output voltage. R Word L16 V 5.5
0x5800
VOUT_MODE
The data byte for VOUT_MODE command, used for commanding and reading output voltage, consists of a 3-bit mode
(only linear format is supported) and a 5-bit parameter representing the exponent used in output voltage Read/Write
commands.
This read-only command has one data byte.
PMBus
COMMAND DETAILS