LTC3883 Datasheet, PDF (32/112 Pages) Linear Technology – Single Phase Step-Down DC/DC Controller with Digital Power System Management

LTC3883/LTC3883-1
PMBus Command Summary
COMMAND NAME
VIN_ON
VIN_OFF
IOUT_CAL_GAIN
VOUT_OV_FAULT_LIMIT
CMD
CODE DESCRIPTION
0x35 Input voltage at which the unit should start
power conversion.
0x36 Input voltage at which the unit should stop
power conversion.
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.
0x40 Output overvoltage fault limit.
DATA
TYPE FORMAT
R/W Word L11
R/W Word L11
R/W Word L11
R/W Word L16
UNITS
V
V
mΩ
V
VOUT_OV_FAULT_
RESPONSE
0x41 Action to be taken by the device when an output R/W Byte Reg
overvoltage fault is detected.
VOUT_OV_WARN_LIMIT 0x42 Output overvoltage warning limit.
R/W Word L16
V
VOUT_UV_WARN_LIMIT 0x43 Output undervoltage warning limit.
R/W Word L16
V
VOUT_UV_FAULT_LIMIT 0x44 Output undervoltage fault limit.
R/W Word L16
V
VOUT_UV_FAULT_
RESPONSE
0x45 Action to be taken by the device when an output R/W Byte Reg
undervoltage fault is detected.
IOUT_OC_FAULT_LIMIT 0x46 Output overcurrent fault limit.
R/W Word L11
A
IOUT_OC_FAULT_
RESPONSE
0x47 Action to be taken by the device when an output R/W Byte Reg
overcurrent fault is detected.
IOUT_OC_WARN_LIMIT 0x4A Output overcurrent warning limit.
R/W Word L11
A
OT_FAULT_LIMIT
0x4F External overtemperature fault limit.
R/W Word L11
C
OT_FAULT_RESPONSE 0x50 Action to be taken by the device when an external R/W Byte Reg
overtemperature fault is detected,
OT_WARN_LIMIT
0x51 External overtemperature warning limit.
R/W Word L11
C
UT_FAULT_LIMIT
0x53 External undertemperature fault limit.
R/W Word L11
C
UT_FAULT_RESPONSE 0x54 Action to be taken by the device when an external R/W Byte Reg
undertemperature fault is detected.
VIN_OV_FAULT_LIMIT 0x55 Input supply overvoltage fault limit.
R/W Word L11
V
VIN_OV_FAULT_
RESPONSE
0x56 Action to be taken by the device when an input R/W Byte Reg
overvoltage fault is detected.
VIN_UV_WARN_LIMIT 0x58 Input supply undervoltage warning limit.
R/W Word L11
V
IIN_OC_WARN_LIMIT
0x5D Input supply overcurrent warning limit.
R/W Word L11
A
POWER_GOOD_ON
POWER_GOOD_OFF
TON_DELAY
0x5E Output voltage at or above which a power good R/W Word L16
V
should be asserted.
0x5F Output voltage at or below which a power good R/W Word L16
V
should be de-asserted.
0x60 Time from RUN and/or Operation on to output R/W Word L11
ms
rail turn-on.
32
DEFAULT
NVM VALUE PAGE
Y
6.5
71
0xCB40
Y
6.0
71
0xCB00
Y
1.8
74
0xBB9A
Y
1.1
72
0x119A
Y
0xB8
83
Y
1.075
72
0x1133
Y
0.925
73
0x0ECD
Y
0.9
73
0x0E66
Y
0xB8
84
Y
29.75
76
0xDBB8
Y
0x00
86
Y
20.0
77
0xDA80
Y
100.0
79
0xEB20
Y
0xB8
87
Y
85.0
79
0xEAA8
Y
–40.0
79
0xE580
Y
0xB8
88
Y
15.5
70
0xD3E0
Y
0x80
82
Y
6.3
70
0xCB26
Y
10.0
78
0xD280
Y
0.93
73
0x0EE1
Y
0.92
73
0x0EB8
Y
0.0
80
0x8000
3883f