STMicroelectronics introduces PMICs for STM32 MPUs in industrial edge systems

GENEVA - STMicroelectronics in Geneva has introduced the STPMIC1L and STPMIC2L power-management integrated circuits designed to support its ARM Cortex-based STM32 microprocessors in industrial and embedded-processing applications.

The PMICs are tailored for the 32-bit STM32MP1x and 64-bit STM32MP2x microprocessor series and are intended to simplify power architecture for complex embedded systems. The devices integrate multiple low-dropout regulators (LDOs) and DC/DC buck converters to supply all required MPU power rails, including a dedicated LDO for external DDR DRAM, reducing board space and bill of materials.

The STPMIC1L supports STM32MP1 devices with two DC/DC buck converters and four LDOs, along with one DRAM LDO and two external pins for power control. The STPMIC2L, designed for STM32MP2 devices, integrates three DC/DC buck converters and seven LDOs, plus one DRAM LDO and three control pins to manage power sequencing and system states.

Both PMICs operate over an input voltage range of 2.8V to 5.5V, enabling designs powered by low-voltage AC/DC adapters, USB sources, or lithium-ion and lithium-polymer batteries. The devices support extended junction temperatures from -40°C to 125°C for operation in industrial and harsh-environment applications, including industrial controls, smart-factory systems, and edge-processing platforms.

The integrated buck converters use adaptive constant on-time control to provide fast transient response under dynamic load conditions, while supporting dynamic voltage scaling to improve system efficiency. Built-in protection features include programmable output discharge, selectable overcurrent protection, and power-rail monitoring to enhance system reliability.

The PMICs also manage power-up and power-down sequencing to meet the accuracy and timing requirements of the host microprocessors, helping ensure stable operation of high-performance embedded computing platforms.

Target applications include point-of-sale terminals, network gateways, home-automation systems, printers, barcode scanners, and metering equipment, where compact, efficient, and integrated power management is critical.

For more information, please visit https://www.st.com.