STM32 Ultra Low Power MCUs

ST’s ultra-low-power MCU platform is based on a proprietary ultra-low-leakage technology and optimized design.

STM32 ultra-low-power microcontrollers offer designers of energy-efficient embedded systems and applications a balance between performance, power, security, and cost effectiveness.


Industrial arm
  • Advanced HMI
  • POS Point of sales
  • Metering
  • Sensors
  • Medical and Healthcare
Home appliance
Smart home
  • Home appliance
  • White goods
  • Advanced HMI
Smart watch
Personal electronics
  • e-bike
  • EV charging
  • Wearables
  • Speaker, Smart speaker, and Audio Hub

Product types:


The new STM32U5 series combines the latest and most efficient Arm® Cortex®-M33 core with an innovative 40 nm platform that reduces energy consumption to the bone, while increasing performance. The series also adds the state-of-the-art features which are required in today’s applications, including advanced cyber security with hardware-based protection, and graphics accelerators for rich graphical user interfaces.


The STM32L5 series enhanced security features leverage Arm® Cortex®-M33 and its TrustZone® for Armv8-M. Thanks to this new core and a new ST ART Accelerator™ (also supporting external memory), the STM32L5 reaches a 443 CoreMark.

The STM32L4 series offers the excellence of ST’s ultra-low power platform with an additional performance dimension by providing 100 DMIPS with DSP instructions and Floating-Point Unit (FPU), more memory (up to 1 Mbyte of Flash memory) and innovative features.
The STM32L4+ series extends STM32L4 technology by offering higher performance (120 MHz/409 CoreMark executing from internal Flash memory), larger embedded memories (up to 2 Mbytes of Flash memory and 640 Kbytes of SRAM), and rendering advanced graphics without compromising ultra-low-power consumption.
The latest generation of entry-level, ultra-low-power MCUs, the STM32U0 series, offers an ideal combination of energy consumption, features, and cost for entry-level applications. This series has been labeled "Sustainable Technology" as it contributes to reducing the carbon footprint by minimizing power consumption in end devices, thus helping to decrease their environmental impact.
The STM32L0 series offers a genuine energy-saving solution for entry-level applications. Available in tiny packages down to 14 pins and with a wide range of Flash memory densities from 8 to 192 Kbytes, the STM32L0 features ultra-low power consumption in a competitive portfolio.

Read more about the benefits of the 32-bit Arm® Cortex®-M processor for MCUs here

Discover our portfolio


The STM32 ultra-low-power MCU series enables new features in embedded system designs and offers best-in-class performance:

    Complete and consistent ultra-low power family
  • From entry-level range to advanced range
  • From 8 kB to 4 MB of Flash
  • From Cortex®-M0+ up to Cortex®-M33
  • Pin-to-pin compatible family
  • Extended temperature range
    High energy efficiency
  • Innovative power management features
  • Various low-power modes
  • Very efficient dynamic run mode
STM32 Explore | On-demand webinar
Unlock power efficiency with the new generation of ultra-low-power entry-level MCUs
STM32 MCU Developer Zone
Everything for STM32 MCU developers, in one place.

Understanding the STM32U585 security configurations to fully benefit from SESIP and PSA certifications

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STM32U585 is an open, general-purpose microcontroller offering specific security features that meet PSA Level-3 & SESIP 3 standards. To learn how to use the SESIP / PSA-certified configuration of the STM32U585 and to understand the security functions covered by these certificates, read our dedicated resources that will guide you during your development.