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LTC2972 Datasheet(PDF) 26 Page - Linear Technology

Part # LTC2972
Description  2-Channel PMBus Power System Manager Featuring Programmable Power Good Outputs
PDF  112 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC2972 Datasheet(HTML) 26 Page - Linear Technology

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LTC2972
26
2972fa
For more information www.linear.com/LTC2972
PMBus COMMAND SUMMARY
Summary Table
COMMAND NAME
CMD
CODE DESCRIPTION
TYPE
PAGED
DATA
FORMAT UNITS EEPROM
DEFAULT
VALUE:
FLOAT
HEX
REF
PAGE
VOUT_UV_FAULT_LIMIT
0x44 Output undervoltage fault limit. Used for
Ton_max_fault and PWRGD pin de-
assertion.
R/W Word
Y
L16
V
Y
0.9
0x1CCD
53
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
0x7F
64
IOUT_OC_WARN_LIMIT
0x4A Output overcurrent warning limit.
R/W Word
Y
L11
A
5.0
0xCA80
54
OT_FAULT_LIMIT
0x4F Overtemperature fault limit for the external
temperature sensor.
R/W Word
Y
L11
°C
Y
65.0
0xEA08
56
OT_FAULT_RESPONSE
0x50 Action to be taken by the device when an
overtemperature fault is detected on the
external temperature sensor.
R/W Byte
Y
Reg
Y
0xB8
<OV>
OT_WARN_LIMIT
0x51 Overtemperature warning limit for the
external temperature sensor.
R/W Word
Y
L11
°C
Y
60.0
0xE3C0
56
UT_WARN_LIMIT
0x52 Undertemperature warning limit for the
external temperature sensor.
R/W Word
Y
L11
°C
Y
0
0x8000
56
UT_FAULT_LIMIT
0x53 Undertemperature fault limit for the external
temperature sensor.
R/W Word
Y
L11
°C
Y
–5.0
0xCD80
56
UT_FAULT_RESPONSE
0x54 Action to be taken by the device when an
undertemperature fault is detected on the
external temperature sensor.
R/W Byte
Y
Reg
Y
0xB8
<OV>
VIN_OV_FAULT_LIMIT
0x55 Input overvoltage fault limit measured at
VIN_SNS pin.
R/W Word
N
L11
V
Y
15.0
0xD3C0
49
VIN_OV_FAULT_RESPONSE
0x56 Action to be taken by the device when an
input overvoltage fault is detected.
R/W Byte
N
Reg
Y
0x80
<OV>
VIN_OV_WARN_LIMIT
0x57 Input overvoltage warning limit measured at
VIN_SNS pin.
R/W Word
N
L11
V
Y
14.0
0xD380
49
VIN_UV_WARN_LIMIT
0x58 Input undervoltage warning limit measured
at VIN_SNS pin.
R/W Word
N
L11
V
Y
0
0x8000
49
VIN_UV_FAULT_LIMIT
0x59 Input undervoltage fault limit measured at
VIN_SNS pin.
R/W Word
N
L11
V
Y
0
0x8000
49
VIN_UV_FAULT_RESPONSE
0x5A Action to be taken by the device when an
input undervoltage fault is detected.
R/W Byte
N
Reg
Y
0x00
65
POWER_GOOD_ON
0x5E Output voltage at or above which the
PWRGD pin should be asserted.
R/W Word
Y
L16
V
Y
0.96
0x1EB8
53
POWER_GOOD_OFF
0x5F Output voltage at or below which the
PWRGD pin should be de-asserted when
Mfr_config_all_pwrgd_off_uses_uv is clear.
R/W Word
Y
L16
V
Y
0.94
0x1E14
53
TON_DELAY
0x60 Time from CONTROL pin and/or OPERATION
command = ON to VOUT_ENn pin = ON.
R/W Word
Y
L11
ms
Y
1.0
0xBA00
58
TON_RISE
0x61 Time from when the VOUT_ENn pin goes high
until the LTC2972 optionally soft-connects
its DAC and begins to servo the output
voltage to the desired value.
R/W Word
Y
L11
ms
Y
10.0
0xD280
58
TON_MAX_FAULT_LIMIT
0x62 Maximum time from VOUT_ENn = 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
0xD3C0
58



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