46
OSD3358-SM-RED
– User Guide
Rev. 1.0 9/19/2017
Octavo Systems LLC
Copyright 2017
4.5
Clamping circuit
Figure 44: OSD3358-SM-RED clamping circuit
Figure 44 shows a clamping circuit designed to prevent a PMIC shutdown fault. The AM335x
datasheet requires that the voltage difference between the power rails VDDS (1.8V) and
VDDSHVx [1-6] (3.3V) of the AM335x processor be less than 2V during the entire power-down
sequence. A detailed description of the clamping circuit and its operation can be found in
“The
OSD335x Reference Design Lesson 1 Power Circuitry Part 4: Clamping Circuit”
(
https://octavosystems.com/app_notes/osd335x-reference-design-lesson-1-power-circuitry-part-
