STMicroelectronics — STM32L5 Ultra-Low-Power MCUs

STM32L5 Series Microcontrollers (MCU): Excellence in Ultra-Low Power with More Security

The STM32L5 series from STMicroelectronics addresses the growing demand for advanced security in embedded and IoT designs. This ultra-low-power microcontroller family delivers an optimal balance of performance, power efficiency and robust protection. Built around the Arm Cortex-M33 core with TrustZone for Armv8-M and enhanced by ST’s integrated security implementation, the STM32L5 series combines strong isolation, secure services and proprietary low-power technologies to create a class-leading platform for energy-conscious IoT, medical, industrial and consumer applications.

Full set of embedded security features

Flexible hardware and software isolation using TrustZone Enhanced security services including dedicated secure user memory space for Secure Boot, symmetric and asymmetric cryptographic acceleration, memory and IP protection, independent readout protection between secure and non-secure domains, active I/O tamper detection, certified cryptolib and embedded Secure Firmware Install loader with ecosystem support.

Best power consumption

• EEMBC benchmarks:
  • 370 ULPMark-CP®
  • 54 ULPMark-PP®
  • 27400 SecureMark-TLS®
• Embedded SMPS step-down converter (optional)
• Best-in-class power efficiency with full flexibility:
  • 17 nA in shutdown mode
  • 3 µA in stop mode with full SRAM and peripheral state retention and 5 µs wake-up time
  • Down to 62 µA/MHz in active mode

Integration, size and performance

• Improved application responsiveness:
  • Arm Cortex-M33 running at 110 MHz delivering up to 165 DMIPS and 443 CoreMark
  • ST ART Accelerator™ with 8 Kbytes of instruction cache supporting internal and external Flash
• High integration and innovation including large embedded memory, USB Type-C with power delivery controller and CAN FD.

The STM32L5 portfolio is available in 7 package types including LQFP48, QFN48, LQFP64, WLCSP81, LQFP100, UFBGA132 and LQFP144, supporting applications up to 125°C ambient temperature.