Datasheet

LTC3880/LTC3880-1
33
3880fc
For more information www.linear.com/LTC3880
PMBus COMMAND SUMMARY
COMMAND NAME
CMD
CODE DESCRIPTION TYPE PAGED
DATA
FORMAT UNITS NVM
DEFAULT
VALUE PAGE
FREQUENCY_SWITCH 0x33 Switching frequency of the controller. R/W Word N L11 kHz Y 350
0xFABC
69
VIN_ON 0x35 Input voltage at which the unit should start
power conversion.
R/W Word N L11 V Y 6.5
0xCB40
70
VIN_OFF 0x36 Input voltage at which the unit should stop
power conversion.
R/W Word N L11 V Y 6.0
0xCB00
70
IOUT_CAL_GAIN 0x38 The ratio of the voltage at the current sense pins
to the sensed current. For devices using a fixed
current sense resistor, it is the resistance value
in mΩ.
R/W Word Y L11 mΩ Y 1.8
0xBB9A
74
VOUT_OV_FAULT_LIMIT 0x40 Output overvoltage fault limit. R/W Word Y L16 V Y 1.1
0x119A
71
VOUT_OV_FAULT_
RESPONSE
0x41 Action to be taken by the device when an output
overvoltage fault is detected.
R/W Byte Y Reg Y 0xB8
81
VOUT_OV_WARN_LIMIT 0x42 Output overvoltage warning limit. R/W Word Y L16 V Y 1.075
0x1133
72
VOUT_UV_WARN_LIMIT 0x43 Output undervoltage warning limit. R/W Word Y L16 V Y 0.925
0x0ECD
73
VOUT_UV_FAULT_LIMIT 0x44 Output undervoltage fault limit. R/W Word Y L16 V Y 0.9
0x0E66
73
VOUT_UV_FAULT_
RESPONSE
0x45 Action to be taken by the device when an output
undervoltage fault is detected.
R/W Byte Y Reg Y 0xB8
82
IOUT_OC_FAULT_LIMIT 0x46 Output overcurrent fault limit. R/W Word Y L11 A Y 29.75
0xDBB8
75
IOUT_OC_FAULT_
RESPONSE
0x47 Action to be taken by the device when an output
overcurrent fault is detected.
R/W Byte Y Reg Y 0x00
84
IOUT_OC_WARN_LIMIT 0x4A Output overcurrent warning limit. R/W Word Y L11 A Y 20.0
0xDA80
76
OT_FAULT_LIMIT 0x4F External overtemperature fault limit. R/W Word Y L11 C Y 100.0
0xEB20
77
OT_FAULT_RESPONSE 0x50 Action to be taken by the device when an external
overtemperature fault is detected,
R/W Byte Y Reg Y 0xB8
86
OT_WARN_LIMIT 0x51 External overtemperature warning limit. R/W Word Y L11 C Y 85.0
0xEAA8
77
UT_FAULT_LIMIT 0x53 External undertemperature fault limit. R/W Word Y L11 C Y –40.0
0xE580
77
UT_FAULT_RESPONSE 0x54 Action to be taken by the device when an external
undertemperature fault is detected.
R/W Byte Y Reg Y 0xB8
86
VIN_OV_FAULT_LIMIT 0x55 Input supply overvoltage fault limit. R/W Word N L11 V Y 15.5
0xD3E0
70
VIN_OV_FAULT_
RESPONSE
0x56 Action to be taken by the device when an input
overvoltage fault is detected.
R/W Byte Y Reg Y 0x80
80
VIN_UV_WARN_LIMIT 0x58 Input supply undervoltage warning limit. R/W Word N L11 V Y 6.3
0xCB26
70
IIN_OC_WARN_LIMIT 0x5D Input supply overcurrent warning limit. R/W Word N L11 A Y 10.0
0xD280
75
POWER_GOOD_ON 0x5E Output voltage at or above which a power good
should be asserted.
R/W Word Y L16 V Y 0.93
0x0EE1
73