STMicroelectronics STPMIC1L and STPMIC2L power management ICs (PMICs) help designers fully leverage the embedded processing capabilities of STMicroelectronics Arm® Cortex®-A architecture microprocessors (MPUs) in high-performance industrial applications.

These two new PMICs are tailored for STMicroelectronics STM32MP1x series 32-bit MPUs and STM32MP2x series 64-bit MPUs, providing cost-effective power supply and circuit protection while saving board space, simplifying power hardware design, and minimizing bill of materials costs. Each PMIC integrates multiple fixed/adjustable LDOs (low-dropout linear regulators) and DC/DC step-down converters to meet all power rail requirements of the MPU, and also includes an LDO regulator for powering external DDR DRAM.

Target applications for these two PMICs include point-of-sale (POS) terminals, network gateways, home automation systems, edge processing platforms, printers, barcode scanners, and metering systems. With a junction temperature range extended to -40°C to 125°C for industrial applications, they can operate reliably in harsh environments such as industrial controls, thermostats, and smart factory equipment.

The STPMIC1L is designed to power the STM32MP1 series, featuring two DC/DC step-down converters, four LDOs (including one dedicated DRAM LDO), and two external power control pins. The STPMIC2L is designed to power the STM32MP2 series MPUs, integrating three DC/DC step-down converters, seven LDOs (including one dedicated DRAM LDO), and three power control pins. Both devices support a wide input voltage range of 2.8V to 5.5V, simplifying design for equipment powered by low-voltage AC/DC adapters, USB interfaces, or lithium-ion/lithium-polymer batteries.

The step-down converters in these two PMICs use adaptive constant-on-time (COT) control mode to ensure fast transient response and support dynamic voltage scaling for excellent energy efficiency. Circuit protection features include configurable output discharge mode, selectable overcurrent protection (OCP), and power rail monitoring. The PMICs also perform power-up and power-down sequencing control, meeting the MPUs stringent accuracy and settling time requirements.

Two evaluation boards, the STEVAL-PMIC1LKV1 and STEVAL-PMIC2LKV1, are now available to help engineers quickly start development projects and accelerate the development process. Both evaluation boards come with a dedicated graphical user interface for configuring and monitoring the PMIC on the board, as well as setting NVM parameters.

The STPMIC1L and STPMIC2L are fully supported by the STM32 MPU ecosystem within OpenSTLinux. Both devices are now in production. The STPMIC1L is offered in a 4mm x 4mm 28-pin VFQFPN package, and the STPMIC2L in a 5mm x 5mm VFQFPN40 package.