LTC2978A View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LTC2978A
Linear Technology
'LTC2978A' PDF : 82 Pages View PDF
LTC2978A
PMBus Command summary
Summary Table
COMMAND NAME
OT_FAULT_RESPONSE
OT_WARN_LIMIT
UT_WARN_LIMIT
UT_FAULT_LIMIT
UT_FAULT_RESPONSE
VIN_OV_FAULT_LIMIT
VIN_OV_FAULT_RESPONSE
VIN_OV_WARN_LIMIT
VIN_UV_WARN_LIMIT
VIN_UV_FAULT_LIMIT
VIN_UV_FAULT_RESPONSE
POWER_GOOD_ON
POWER_GOOD_OFF
TON_DELAY
TON_RISE
TON_MAX_FAULT_LIMIT
TON_MAX_FAULT_RESPONSE
TOFF_DELAY
STATUS_BYTE
STATUS_WORD
STATUS_VOUT
CMD
CODE DESCRIPTION
DEFAULT
VALUE
DATA
FLOAT REF
TYPE PAGED FORMAT UNITS EEPROM HEX PAGE
0x50 Action to be taken by the device when an R/W Byte N
Reg
overtemperature fault is detected.
Y
0xB8 37
0x51 Overtemperature warning limit.
R/W Word N
L11 °C
Y
75.0 35
0xEA58
0x52 Undertemperature warning limit.
R/W Word N
L11 °C
Y
0
35
0x8000
0x53 Undertemperature fault limit.
R/W Word N
L11 °C
Y
–5.0 35
0xCD80
0x54 Action to be taken by the device when an R/W Byte N
Reg
undertemperature fault is detected.
Y
0xB8 37
0x55 Input overvoltage fault limit measured at R/W Word N
L11
V
VIN_SNS pin
0x56 Action to be taken by the device when an R/W Byte N
Reg
input overvoltage fault is detected.
Y
15.0 34
0xD3C0
Y
0x80 37
0x57 Input overvoltage warning limit measured R/W Word N
L11
V
at VIN_SNS pin
0x58 Input undervoltage warning limit
measured at VIN_SNS pin.
R/W Word N
L11
V
0x59 Input undervoltage fault limit measured at R/W Word N
L11
V
VIN_SNS pin
0x5A Action to be taken by the device when an R/W Byte N
Reg
input undervoltage fault is detected.
Y
14.0 34
0xD380
Y
0
34
0x8000
Y
0
34
0x8000
Y
0x00 37
0x5E Output voltage at or above which a power R/W Word Y
L16
V
good should be asserted.
Y
0.96 34
0x1EB8
0x5F Output voltage at or below which a power R/W Word Y
L16
V
good should be deasserted.
Y
0.94 34
0x1E14
0x60 Time from CONTROL pin and/or
R/W Word Y
OPERATION command = ON to VOUT_EN
pin = ON.
L11 ms
Y
1.0 35
0xBA00
0x61 Time from when the VOUT_ENn pin goes R/W Word Y
high until the LTC2978A optionally soft-
connects its DAC and begins to servo the
output voltage to the desired value.
L11 ms
Y
10.0 35
0xD280
0x62 Maximum time from VOUT_EN = ON
assertion that an UV condition will be
tolerated before a TON_MAX_FAULT
condition results.
R/W Word Y
L11 ms
Y
15.0 35
0xD3C0
0x63 Action to be taken by the device when a R/W Byte Y
Reg
TON_MAX_FAULT event is detected.
Y
0xB8 37
0x64 Time from CONTROL pin and/or
R/W Word Y
OPERATION command = OFF to VOUT_EN
pin = OFF.
L11 ms
Y
1.0 35
0xBA00
0x78 One byte summary of the unit’s fault
condition.
R Byte
Y
Reg
NA 38
0x79 Two byte summary of the unit’s fault
condition.
R Word Y
Reg
NA 39
0x7A Output voltage fault and warning status. R Byte
Y
Reg
NA 39
2978af
26
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