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Reduce Power Consumption in High-Performance Designs

Finding the right balance of power consumption and performance can be challenging when it comes to selecting a microcontroller (MCU) for power-constrained designs that also require a high level of functionality. Our broad range of ultra-low-power and low-power 32-bit MCUs offers flexible power-saving techniques along with advanced features and performance levels that can meet your design’s specific requirements. Devices range from the smallest SAM D Arm® Cortex®-M0+ based MCUs, to the ultra-low-power SAM L Arm Cortex-M0+ based MCUs, to higher-performing SAM Arm Cortex-M4F based MCUs and the PIC32MX family of eXtreme Low Power (XLP) MCUs. They are excellent options for reducing power consumption in many applications including the Internet of Things (IoT), consumer, industrial, medical and other battery-powered devices.

Benefits of 32-bit XLP PIC MCUs and SAM MCUs with picoPower® Technology

Low-Power Sleep Modes and Operating Voltage

  • Active mode current down to 25 μA/MHz
  • Deep sleep current down to 100 nA
  • SRAM retention (40 KB) down to ~1 μA
  • 1.2 μs wake-up time from idle state
  • Fully operational down to 1.62V while still maintaining all functionality, including analog functions
  • Highest certified ULPMark™ score for any Arm Cortex-M23 or Arm Cortex- M0+ class device; SAM L11 MCU achieved ULPMark score of 410

Flexible and Advanced Peripherals

  • Event System for CPU-independent, inter-peripheral communication offloads and minimizes CPU active time
  • Sleepwalking with dynamic power gating allows MCU to be put into deep sleep and wake up only upon a pre-qualified event
  • Chip-level tamper resistance and Arm TrustZone® technology to protect low-power applications from security vulnerabilities
  • Low-power SERCOM and timer counters
  • Enhanced Peripheral Touch Controller (PTC) offers 4 μA standby with multi-button wake on touch and is highly responsive with superior water tolerance and excellent noise immunity

Technology and Innovation

  • eXtreme Low Power (XLP) and picoPower technologies
  • On-the-fly user-selectable performance levels
  • Automatic voltage regulator switching with multiple operating modes
  • Multiple power domains with automatic power domain gating
  • Automatic low-power SRAM switching with optional disable
  • Low-power battery backup mode

Large Portfolio and Efficient Performance Across Voltage Range

  • 14–128 pins
  • 8 KB–1 MB Flash
  • 25 MHz, 32 MHZ, 48 MHz, 96 MHz and 120 MHz performance levels
  • SAM and PIC32 family derivatives
  • 1.62V–3.6V operating voltage
  • Wide selection of packages
  • 1.93 × 2.43 mm WLCSP

32-bit Low-Power MCU Product Specifications

Product Performance Memory Active Sleep
Back Up/
VIN Features
SAM L10 Arm® Cortex®-
M23 Core
32 MHz
16–64 KB Flash
4–16 KB
25 μA/MHz
0.5 μA
1.5 μs
100 nA 1.62–3.6 picoPower®
Event System
SAM L11 Arm Cortex-
M23 Core
32 MHz
16–64 KB Flash
8–16 KB
25 μA/MHz
0.5 μA
1.5 μs
100 nA 1.62–3.6 Advanced Security
Event System,
SAM L21/22 Arm Cortex-
M0+ Core
48/32 MHz
32–256 KB Flash
4–32 KB SRAM
35 μA/MHz
0.9 μA
1.2 μs
200 nA 1.62–3.6 picoPower,
Event System,
Sleep Walking
SAM D5x Arm Cortex-
M4F Core
120 MHz
Up to 1 MB Flash
65 μA/MHz
10 μA
5 μs
3 µA 1.71–3.6 Event System,
Sleep Walking
SAM E5x Arm Cortex-
M4F Core
120 MHz
Up to 1 MB Flash
65 μA/MHz
10 μA
5 μs
3 µA 1.71–3.6 Event System,
Sleep Walking
SAM D1/2x Arm Cortex-
M0+ Core
48 MHz
8–256 KB Flash
2–32 KB SRAM
70 μA/MHz
3.5 μA
4 μs
No back up
1.62–3.6 Event System,
Sleep Walking
SAM 4L Arm Cortex-
M4 Core
48 MHz
128–512 KB Flash
32/64 KB SRAM
90 μA/MHz
1.5 μA
1.5 μs
500 nA 1.68–3.6 Event System,
Sleep Walking
SAM G5x Arm Cortex-
M4F Core
48/96/120 MHz
256–512 KB Flash
64–176 KB SRAM
100 μA/MHz
7 μA
3 μs
1 µA 1.62–3.6 Event System,
Sleep Walking
M4K® Core
72 MHz
128–256 KB Flash
32-64 KB RAM
250 μA/MHz
13 μA
673 nA 2.5–3.6 XLP
microAptiv™ Core
25 MHz
64–256 KB ECC Flash
8–32 KB SRAM
280 μA/MHz
5 μA
650 nA 2.0–3.6 XLP

New/Popular 32-bit Low-Power MCUs Products

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32-bit Low-Power MCU Hardware Development Tools

These 32-bit low-power MCU development boards make it easy to get started with your application. Click on the 32-bit MCU Development Tools button to see a complete list of development tools for our 32-bit MCUs.

32-bit Low-Power MCU Hardware Development Tools

32-bit Software Development Tools


Title Download
AN_42750 - AT14973: SAM L21 Wearable Demo Reference Design User Guide Download
AN_42142 - AT03258: Using Low Power Modes in SAM4E Microcontroller Download
AN_42501 - AT11489: Low Power Techniques for SMART ARM MCUs Download
AN_42160 - AT03498: Low Power Modes in SAM3 Family Download
AN_32093 - AVR32739: Low power software design using 32-bit AVR UC3 Download
AN_42056 - AVR3005: Low Power QTouch Design Download
AN2812 - Low-Power Touch Design Download
AN_42154 - AT03782: Using Low Power Modes in SAM4N Microcontroller Download
AN_32136 - AVR32917: Getting started with the picoPower Board Download
AN_42320 - AT04113: How to implement SleepWalking on an ARM Cortex-M4 MCU Application: Step-by-step Project Building Guide Download
AN_42263 - AT07146: Low Power Design Consideration in Thermostat with SAM4L Download
AN_42204 - AT03289: SAM4L Low Power Design with FreeRTOS Download
AN_42412 - AT04296: Low Power Features of SAM L Series Devices Download
AT12815: SAM L21 ADC Sampling using Low-Power Features Download
Atmel AT09886: SAM L22 Getting Started Guide Download
AN_42551 - AT13886: SAM L22 System Clock Management (SYSTEM CLOCK) Driver Download
AN_42400 - AT03976: SAM L21 OPAMP as ADC Gain Amplifier Download
Atmel AT03975: Getting Started with SAM L21 Download
Title Download
32-bit MCU Low Power Sell Sheet Download
Title Download
Ultra Low-Power Techniques Tech Brief Download

32-bit Ultra-Low-Power and Low-Power MCUs