Vout_margin_high, Vout_margin_low, Vout_transition_rate – Maxim Integrated MAX15303 PMBus Command Set User Manual
Page 11
MAX15303 PMBus Command Set User’s Guide
Page 11 of 52
VOUT_MARGIN_HIGH
Reference:
Standard Command
Lockable:
Yes
Command Code:
0x25
Format:
Unsigned integer mantissa
Data Bytes:
2
Units:
V
Transfer:
Read/Write Word
Factory Value:
0x14CD (1.300V)
Description/Notes: See Section 13.6 of the PMBus Specification Part II.
VOUT_MARGIN_HIGH mantissa data sent to and from the MAX15303 must be divided by 4096 to
determine the actual voltage value, according to the fixed value of
The factory value of 0x14CD (1.300V) will be overridden during initialization to
x 1.05, unless a specific value has been written to the User Store.
In the MAX15303, there are seven possible output voltage ranges based on seven corresponding
internal feedback divider taps. The desired value of VOUT_MARGIN_HIGH is retained and read back
from Operating Memory, regardless of hardware limitations imposed by the feedback divider range.
If the MAX15303 is set for margin-high operation prior to the output being enabled, the output will
rise directly to VOUT_MARGIN_HIGH at the rate determined by VOUT_COMMAND/
Likewise, if the output is disabled from margin-high operation, the output will fall at a rate
determined by -VOUT_COMMAND/
VOUT_MARGIN_LOW
Reference:
Standard Command
Lockable:
Yes
Command Code:
0x26
Format:
Unsigned integer mantissa
Data Bytes:
2
Units:
V
Transfer:
Read/Write Word
Factory Value:
0x1001 (1.000V)
Description/Notes: See Section 13.7 of the PMBus Specification Part II.
VOUT_MARGIN_LOW mantissa data sent to and from the MAX15303 must be divided by 4096 to
determine the actual voltage value, according to the fixed value of
The factory value of 0x1001 (1.000V) will be overridden during initialization to
x 0.95, unless a specific value has been written to the User Store.
In the MAX15303, there are seven possible output voltage ranges based on seven corresponding
internal feedback divider taps. The desired value of VOUT_MARGIN_LOW is retained and read back
from Operating Memory, regardless of hardware limitations imposed by the feedback divider range.
If the MAX15303 is set for margin-low operation prior to the output being enabled, the output will
rise directly to VOUT_MARGIN_LOW at the rate determined by VOUT_COMMAND/
Likewise, if the output is disabled from margin-low operation, the output will fall at a rate determined
by -VOUT_COMMAND/