Analog Workshop 2023

A 2-8V Vin Scalable Multi-Ratio SC DCDC Converter for MCU Integration in 28nm CMOS

This multi-ratio switched-capacitor DCDC converter supports 2-8V input voltage using only 2.5V IO devices in 28nm CMOS. Its scalable architecture allows for configurations with 2 to 4 external 1µF capacitors enabling optimum power management for a broad range of low-end to high-end automotive microcontrollers with 0.9-1.1V core supply and up to 670mA load current. The peak efficiency is 91%. Switch conductance regulation ensures constant frequency operation, mandatory for automotive applications.