Sequencing is needed when more voltages are generated by the same dsPIC® to supply different areas/chips on the same board. It is required that these voltages ramp from zero to the nominal supply voltage (and vice versa at switch off) in the correct order and with predefined ramp duration.

Sequencing can be implemented digitally. The diagram below represents the sequential sequencing operation. For each output voltage, the corresponding Vref is driven by the firmware in order to follow the desired ramp profile. The correct amount of delay at the beginning impacts any sequencing pattern.


The diagrams here present different types of patterns that are normally used. Other (application-specific) patterns are easily implemented since the user has the complete control of all timing.

© 2017 Microchip Technology, Inc.
Information contained on this site regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.