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LTC3882_15 Datasheet, PDF (36/104 Pages) Linear Technology – Dual Output PolyPhase Step-Down DC/DC Voltage Mode Controller with Digital Power System Management
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LTC3882
PMBus COMMAND SUMMARY
Table 7. PMBus Command Summary
COMMAND NAME
CMD
CODE DESCRIPTION
PAGE
0x00 Channel (page) presently selected for
any paged command.
OPERATION
0x01 On, off and margin control.
ON_OFF_CONFIG
0x02 RUN pin and PMBus on/off command
configuration.
CLEAR_FAULTS
0x03 Clear all set fault bits.
PAGE_PLUS_WRITE
0x05 Write a command directly to a specified
page.
PAGE_PLUS_READ
0x06 Read a command directly from a
specified page.
WRITE_PROTECT
0x10 Protect the device against unintended
PMBus modifications.
STORE_USER_ALL
0x15 Store entire operating memory in
EEPROM.
RESTORE_USER_ALL
0x16 Restore entire operating memory from
EEPROM.
CAPABILITY
0x19 Summary of supported optional PMBus
features.
SMBALERT_MASK
0x1B Mask ALERT activity
DATA
TYPE PAGED FORMAT
R/W Byte N
Reg
R/W Byte Y
Reg
R/W Byte Y
Reg
Send Byte N
W Block N
Block R/W N
Process
R/W Byte N
Reg
Send Byte N
Send Byte N
R Byte N
Reg
Block R/W Y
Reg
UNITS NVM
l
l
l
l
VOUT_MODE
VOUT_COMMAND
VOUT_MAX
VOUT_MARGIN_HIGH
VOUT_MARGIN_LOW
VOUT_TRANSITION_RATE
FREQUENCY_SWITCH
0x20 Voltage-related format (Linear) and
exponent.
0x21 Nominal VOUT value.
R Byte Y
R/W Word Y
0x24 Maximum VOUT that can be set by any R/W Word Y
command, including margin.
0x25 VOUT at high margin, must be greater
than VOUT_COMMAND.
R/W Word Y
0x26 VOUT at low margin, must be less than R/W Word Y
VOUT_COMMAND.
0x27 VOUT slew rate for programmed output R/W Word Y
changes.
0x33 PWM frequency control.
R/W Word N
Reg
L16
V
l
L16
V
l
L16
V
l
L16
V
l
L11 V/ms l
L11
kHz l
VIN_ON
VIN_OFF
IOUT_CAL_GAIN
VOUT_OV_FAULT_LIMIT
0x35 Minimum input voltage to begin power R/W Word N
conversion.
0x36 Decreasing input voltage at which power R/W Word N
conversion stops.
0x38 Ratio of ISENSE± voltage to sensed
current.
R/W Word Y
0x40 VOUT overvoltage fault limit.
R/W Word Y
VOUT_OV_FAULT_RESPONSE 0x41 VOUT overvoltage fault response.
VOUT_OV_WARN_LIMIT
0x42 VOUT overvoltage warning limit.
R/W Byte Y
R/W Word Y
L11
V
l
L11
V
l
L11
mΩ l
L16
V
l
Reg
l
L16
V
l
DEFAULT
VALUE
0x00
0x80
0x1E
0x00
0xB0
see CMD
details
0x14
2–12
1.0V
0x1000
5.5V
0x5800
1.05V
0x10CD
0.95V
0x0F33
0.25
0xAA00
500kHz
0xFBE8
6.5V
0xCB40
6.0V
0xCB00
0.63mΩ
0xB285
1.1V
0x119A
0xB8
1.075V
0x1133
SEE
PAGE
66
70
69
88
66
67
67
99
99
68
96
76
76
77
77
77
81
71
75
75
79
77
92
78
3882f
36
For more information www.linear.com/LTC3882
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