Power_good_off, Ton_delay, Ton_rise – Maxim Integrated MAX15301 PMBus Command Set User Manual
Page 17
MAX15301 PMBus Command Set User’s Guide
Rev 1
Page 17 of 53
POWER_GOOD_OFF
Reference:
Standard Command
Lockable:
Yes
Command Code:
0x5F
Format:
Unsigned integer mantissa
Data Bytes:
2
Units:
V
Transfer:
Read/Write Word
Factory Value:
0x0F99 (see Description)
Description/Notes: See Section 15.32.2 of the PMBus Specification Part II.
POWER_GOOD_OFF mantissa data sent to and from the MAX15301 must be divided by 4096 to
determine the actual voltage value, according to the fixed value of
In the MAX15301, there are seven possible output voltage ranges based on seven corresponding
internal feedback divider taps. The MAX15301 hardware has 8-bit resolution for the power-good
threshold within each of these seven ranges.
The desired value of POWER_GOOD_OFF is retained in memory, regardless of limitations imposed by
the feedback divider range and the 8-bit fault limit resolution, but the read-back value is based on
actual hardware register settings.
The factory value of 0x0F99 (0.980V) will be overridden during initialization to
x 0.93, unless a specific value has been written to the User Store.
TON_DELAY
Reference:
Standard Command
Lockable:
Yes
Command Code:
0x60
Format:
Linear
Data Bytes:
2
Units:
ms
Transfer:
Read/Write Word
Factory Value:
0xCA80 (see Description)
Description/Notes: See Section 16.1 of the PMBus Specification Part II.
The TON_DELAY command sets the delay time between a valid enable condition and the beginning of
the output ramp to regulation at
. The nominal factory value is 5ms.
An 8-bit timer with approximately 570μs resolution allows for delay times from ≈1ms to ≈145ms.