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AN78646 - Integrated Power Manager Using PSoC® 1 | Cypress Semiconductor

AN78646 - Integrated Power Manager Using PSoC® 1

Last Updated: 
Aug 24, 2015


Computing and communication systems are complex and comprise multiple subsystems. Each subsystem can have its own voltage domain, which is also known as a power rail. Each power rail needs to be powered up and monitored individually. This creates a need for power management. Because this activity is a health indicator of the system, it cannot be incorporated in any of the subsystems. For this reason, a dedicated chip is used.

Power management consists of the following parts:

  • accurate and reliable voltage sequencing
  • rapid power rail fault detection
  • voltage and current monitoring of power rails to optimize power consumption
  • real-time trimming for closed-loop control of power converters (voltage regulators)
  • in-system margining
  • fault/event logging in EEPROM
  • communication with the host controller using I2C, SMBus, or PMBus