STPMIC1L & STPMIC2L PMICs: Industrial MPU Power Management Solution

Key Features of STPMIC1L and STPMIC2L PMICs

As industrial applications—including POS terminals, network gateways, home automation systems, edge processing platforms, and smart factory devices—demand increasingly compact and efficient power solutions, the STPMIC1L and STPMIC2L emerge as ideal companions for STM32 MPUs. Their monolithic integration eliminates the need for multiple discrete power components, saving valuable PCB space, streamlining hardware design, and reducing bill of materials (BOM) costs—critical advantages for manufacturers seeking to gain a competitive edge in a crowded marketplace.

Both PMICs incorporate multiple fixed- and adjustable-low-dropout (LDO) regulators and DC/DC buck converters, fully meeting the power rail requirements of their respective MPUs. A dedicated LDO regulator is also integrated to power external DDR DRAM, ensuring seamless compatibility with memory components and lowering design complexity. Built to withstand harsh industrial environments, the chips operate reliably over an extended junction temperature range of -40°C to 125°C, making them well-suited for industrial control systems, thermostats, and other equipment operating in extreme conditions—an essential trait for industrial PMIC with LDO regulators.

STPMIC1L vs STPMIC2L: Technical Specifications

While sharing core industrial-grade capabilities, the STPMIC1L and STPMIC2L are optimized for different MPU series to align with varying performance needs. The STPMIC1L is designed for the STM32MP1 series, featuring 2 DC/DC buck converters, 4 LDOs (including 1 DRAM-specific LDO), and 2 external power control pins—ideal for an STM32MP1x PMIC solution. In contrast, the STPMIC2L is tailored for the STM32MP2 series, featuring 3 DC/DC buck converters, 7 LDOs (including 1 DRAM-specific LDO), and 3 power control pins. Both devices support a wide input voltage range of 2.8V to 5.5V, simplifying design for devices powered by low-voltage AC/DC adapters, USB ports, lithium-ion, or lithium-polymer batteries.

Efficiency, Reliability, and Sustainability

Efficiency and reliability are at the core of these PMICs. Their buck converters utilize an adaptive Constant On-Time (COT) control mode, delivering fast transient response and supporting dynamic voltage scaling to achieve excellent energy efficiency—a critical factor for reducing power consumption in battery-powered and energy-sensitive industrial applications. According to the International Energy Agency (IEA), efficient power electronics could cut global electricity consumption in devices by up to 20% by 2030, making these PMICs a sustainable choice for manufacturers.

Safety Features and Scalability

To ensure system safety, the STPMIC1L and STPMIC2L include comprehensive circuit protection features, such as configurable output discharge mode, optional over-current protection (OCP), and power rail monitoring. They also manage power-up and power-down sequencing, meeting the strict precision and settling time requirements of high-performance MPUs. Additionally, user-programmable non-volatile memory (NVM) enables scalability to support a broad range of applications, with simple reprogramming via I²C for mass production—enhancing flexibility for an industrial MPU PMIC compact solution.

Evaluation Kits and Ecosystem Support

STMicroelectronics has also launched two evaluation kits—STEVAL-PMIC1LKV1 and STEVAL-PMIC2LKV1—to accelerate development cycles. Each kit includes a dedicated graphical user interface (GUI) for easy PMIC configuration, monitoring, and NVM parameter setting, allowing engineers to kickstart their projects quickly. Both PMICs are fully supported by the STM32 MPU ecosystem within OpenSTLinux, ensuring seamless software integration and reducing time-to-market.

Package Details and Application Value

Currently in mass production, the STPMIC1L is available in a 4mm x 4mm 28-pin VFQFPN package, while the STPMIC2L comes in a 5mm x 5mm 40-pin VFQFPN package—compact form factors that further optimize PCB space utilization. For industrial designers looking to unlock the full potential of STM32MP1x and STM32MP2x MPUs, the STPMIC1L and STPMIC2L offer an ideal balance of performance, cost, and ease of use.