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STMICROELECTRONICS STM32 L5 Ultra-Low-Power MCUs | New Product Brief

September 30, 2020 by Mouser Electronics

This New Product Brief (NPB) is part of a video series highlighting the features, applications, and technical specs of newly-released products.


STMicroelectronics STM32 L5 Ultra-Low-Power MCUs offer flexible power control and enhanced security features for embedded applications that require high performance and low power consumption. 

STM32 L5 MCUs are based on an Arm Cortex-M33 core with FPU that operates at up to 110MHz with embedded high-speed memories and an external memory controller, as well as an ST ART Accelerator for enhanced security. The MCU features Arm TrustZone technology and ST security technology, providing hardware-based security functions and securable I/Os, memories, and peripherals. = The MCUs employ ST’s FlexPowerControl and have integrated power conversion, providing flexible power management and reducing overall power consumption. 

This includes low-power states with consumption as low as 17nA and operation as low as 62µA/MHz. 

  • Core: Arm® Cortex®-M33 CPU with TrustZone® and FPU 
    • 1.5 DMIPS/MHz (Drystone 2.1) 
    • 442 CoreMark® (4.02 CoreMark/MHz) 
  • Memories: Up to 512KB Flash (two banks read-while-write) and 256KB SRAM 
    • External memory interface for SRAM, PSRAM, NOR, NAND, FRAM 
  • ART Accelerator™: 8KB instruction cache for 0-wait-state execution from Flash and external memories 
  • Security: Arm® TrustZone® and securable I/Os, memories, and peripherals 
  • Efficient operation: 
    • Integrated LDO and SMPS power conversion 
    • 370 ULPMark-CP® score 
  • Ultra-low-power operation: 
    • Low-power states down to 17nA 
    • 62 μA/MHz Run mode @ 3 V (SMPS step-down converter mode) 

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