LM25066APSQE/NOPB National Semiconductor, LM25066APSQE/NOPB Datasheet - Page 30

• Manufacturer Part Number: LM25066APSQE/NOPB
• Description: IC CTLR PM HOTSWAP 24-LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM25066APSQE/NOPB

• Applications: Base Station-Networking Line Cards, Servers
• Current - Supply: 5.8mA
• Voltage - Supply: 2.9 V ~ 17 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: *
• Package / Case: *
• Input Voltage: 17V
• Internal Switch: No
• Supply Voltage Range: 2.9V To 5.5V
• Rohs Compliant: Yes
• Digital Ic Case Style: LLP
• No. Of Pins: 24
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM25066APSQE/NOPBTR

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VIN_UV_WARN_LIMIT (58h)
The VIN_UV_WARN_LIMIT command is a standard PM-
Bus ™ command that allows configuring or reading the thresh-
old for the VIN under-voltage warning detection. Reading and
writing to this register should use the coefficients shown in the
Telemetry and Warning Conversion Coefficients Table. Ac-
cesses to this command should use the PMBus ™ read or
write word protocol. If the measured value of VIN falls below
the value in this register, VIN UV Warn flags are set in the
respective registers, and the SMBA signal is asserted.
STATUS_WORD (79h)
The STATUS_WORD command is a standard PMBus ™ com-
mand that returns the value of a number of flags indicating the
state of the LM25066A. Accesses to this command should
use the PMBus™ read word protocol. To clear bits in this
Value
0h – 0FFEh
0FFFh
Bit
Bit
15
14
13
12
11
10
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
1
0
TABLE 7. VIN_OV_WARN_LIMIT Register
Meaning
VIN Over-voltage
Warning detection
threshold
VIN Over-voltage
Warning disabled
None of the Above
TEMPERATURE
None of the Above
POWER GOOD
VIN UV FAULT
TEMPERATURE
VIN UV FAULT
IOUT/POUT
UNKNOWN
VOUT OV
IOUT OC
OTHER
VOUT OV
IOUT OC
NAME
INPUT
VOUT
FANS
BUSY
MFR
CML
OFF
NAME
BUSY
CML
OFF
Default
0FFFh (disabled)
n/a
TABLE 10. STATUS_WORD Definitions
TABLE 9. STATUS_BYTE Definitions
This bit is asserted if the MOSFET is not switched on for
A Manufacturer Specific Fault or Warning has occurred
A fault or warning not listed in bits [7:1] has occurred
This bit is asserted if the MOSFET is not switched on
A fault or warning not listed in bits [7:1] has occurred
An output voltage fault or warning has occurred
A Temperature Fault or Warning has occurred
An input voltage or current fault has occurred
A Temperature Fault or Warning has occurred
The Power Good signal has been negated
30
A VIN Under-voltage Fault has occurred
A VIN Under-voltage Fault has occurred
A Communication Fault has occurred
A Communication Fault has occurred
STATUS_BYTE (78h)
The STATUS_BYTE is a standard PMBus ™ command that
returns the value of a number of flags indicating the state of
the LM25066A. Accesses to this command should use the
PMBus ™ read byte protocol. To clear bits in this register, the
underlying fault should be removed and a CLEAR_FAULTS
command issued.
register, the underlying fault should be removed and a
CLEAR_FAULTS command issued. The INPUT and VIN UV
FAULT flags will default to 1 on startup. However, they will be
cleared to 0 after the first time the input voltage exceeds the
resistor programmed UVLO threshold.
Value
1h – 0FFFh
0000h
Not Supported, always 0
Not Supported, always 0
Not Supported, always 0
Not Supported, always 0
Not Supported, always 0
Not Supported, always 0
Not Supported, always 0
Not Supported, always 0
Not Supported, always 0
Not Supported, always 0
TABLE 8. VIN_UV_WARN_LIMIT Register
for any reason.
any reason.
Meaning
Meaning
Meaning
VIN Under-voltage
Warning detection
threshold
VIN Under-voltage
Warning disabled
Default
0000h (disabled)
n/a
Default
Default
0
1
0
0
1
0
0
1
0
0
1
1
1
0
0
0
0
1
0
0
1
0
0
1