MC33906
NXP
MC33906 (PowerSBC5)
Application NoteNxp
Flash Core Voltage Supply Requirements and Considerations for NVM
Guidelines for managing the 3.3V flash memory power supply in NXP microcontrollers to prevent electrical overstress and hardware damage using internal regulators and SBCs.
Overview
This application note provides technical requirements and protection strategies for the non-volatile memory (NVM) flash core voltage supply in NXP microcontrollers, specifically for C90 technology like the MPC56xx series. It defines strict operating conditions, noting that while 3.3V is typical, voltages exceeding 3.6V can lead to electrical overstress (EOS) and damage to the NVM pump clock circuitry. The document outlines several protection solutions: utilizing integrated internal regulators, employing Power System Basis Chips (SBC) such as the MC33909 and MC33907/8 series for over-voltage detection and current limiting, implementing transient voltage suppression (TVS) diodes, and using decoupling capacitors for noise suppression. It includes characterization data demonstrating failure points and comparisons of diode technologies for power supply protection.
Use Cases
- Automotive MCU power management
- Protecting NVM flash memory from overvoltage
- Designing with Power System Basis Chips
- Voltage surge protection for microcontrollers
- C90 flash technology power sequencing
Topics
NXP
MC33909
MC33907
MC33908
MC33906
Flash Core Voltage
VFLASH
Electrical Overstress
EOS
NVM Protection
Power System Basis Chip
SBC
Referenced Parts
MC33907
NXP
MC33907/8 (PowerSBC10/20)
MC33908
NXP
MC33907/8 (PowerSBC10/20)
MC33909
NXP
MC33909 (CANopy)
| MC33906 | NXP | MC33906 (PowerSBC5) |
| MC33907 | NXP | MC33907/8 (PowerSBC10/20) |
| MC33908 | NXP | MC33907/8 (PowerSBC10/20) |
| MC33909 | NXP | MC33909 (CANopy) |