TIDUFF9 September   2025

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1 System Description
  8. 2 Power Design Parameters
  9. 3 Sequencing
    1. 3.1 Start-Up
    2. 3.2 Shutdown
  10. 4 Schematics
  11. 5 Front-End Protection
  12. 6 Multiple Peripheral Rail Buck Converter PMICs
  13. 7 Low-Voltage, High-Current, Core Rail Buck Converter
  14. 8 Voltage Supervisor
  15. 9 Summary
  16. 10Documentation Support
  17.   Trademarks

1 System Description

The original power source for this system can be either a battery or a power supply that is typically between 8Vin to 18Vin and capable of delivering about 150W of power.

The power source is fed to an optional front-end protection (FEP) sub-circuit, controlled by the LM74910-Q1 integrated circuit (IC), that acts as a programmable electronic safety switch with numerous safety features.

Following the FEP there is a buck converter, referred to as the 5V pre-regulator, that generates a well-regulated 5V voltage level from a higher voltage input. This 5V rail supplies the main point-of-load (POL) converters that regulate the voltages needed for the rails of the 2VE3858 device.

Two TPS62893-Q1 regulator ICs are used in a dual-phase configuration to supply the main core rail. The TPS6594-Q1 and LP8764-Q1 power management ICs (PMICs) are utilized for the other rails.

There is also a multirail voltage supervisor IC that monitors and communicates if all of the rails are within the respective acceptable voltage levels. Additionally, the multirail voltage supervisor IC is included for functional safety purposes.