 In previous months, we had the pleasure of presenting you with the impressive E-EMBC scores with the STM32-L4… STM32-L433 was able to provide a good CoreMark score with one of the best ULP bench results of the market. Today, we go even further with an expansion of our product offer to include SMPS. STM32-L4 top products are now compliant with switched mode power supply. How does the SMPS work? STM32-L4XXP is supplied by an external DC-to-DC converter, and to optimize power, three GPIOs can be dedicated to drive it. SMPS-EN signal to enable converter, SMPS-VX to select converter voltage, and SMPS-PG, which sends a flag to MCU when the voltage is OK. The result is a very good power efficiency, especially from 2.1 volts to 3.0 volts and more, which is the CR2032 battery operating range. In this graphical example, the efficiency during a CoreMark test is obvious. A lot of IOT's sensors and connected objects are supplied by CR2032 batteries, glucose meter, connected sole, smartwatch, motion detector, smart meter, flow meter, or even domestic thermostat. Now, concerning ULP bench scores, we can see that STM32-L433P score is really high, between 2.1 and 3.1 volts. The most optimized solution is to activate the SMPS function between these two values and to bypass it for other supplies values. If your application is based on a CR2032 battery, for example, and it needs extra efficiency above 2.1 volts, use SMPS capabilities and enjoy STM32-L433's Best in Class score. If your application needs more efficiency before this range, switch off the SMPS and combine both impressive scores.