STM32MP1 microprocessor supporting power chip and general system power management solution
Hongkong, December 10, 2019-STMicroelectronics launches STPMIC1 power management chip (PMIC), integrating four DC / DC buck converters, one DC / DC boost converter and six low-dropout regulators ( LDO) to meet the complex power requirements of highly integrated systems based on application processors.
This chip is the best companion PMIC for ST’s STM32MP1 * heterogeneous multi-core microprocessor. STM32MP1 * Integrates single- or dual-core Arm®Cortex®-A7 processors and Cortex®-M4 cores, optional 3D graphics processing units, and a wealth of digital and analog peripherals for a variety of applications.
Compared with designing the same number of power rails with discrete devices, STPMIC1 not only saves board space and bill of materials costs, but also provides power rail monitoring and protection functions, handles power-up / power-down sequences, and meets ST32MP1 voltage accuracy And setup time requirements.
Octavo Systems, an authorized STMicroelectronics partner, has developed the OSD32MP1x family of microprocessor system-in-package (SiP) devices using STM32MP1 and STPMIC1. This solution occupies a board area that is reduced by up to 64% compared to an equivalent system using discrete devices, while also solving power supply design challenges such as power-up and power-down sequences.
Greg Sheridan, Vice President of Strategy, Octavo Systems, said: “STPMIC1 is an ideal power management solution for OSD32MP1x series system-in-package devices. It has only one input and 14 output rails (including 5V boost voltage), which can meet the requirements of the STM32MP1 microprocessor. With all the power requirements and multiple outputs available to power the rest of the system, our SiPs can be packaged in a small 18mm x 18mm package and have the flexibility to power a variety of applications. “
In addition to powering the microprocessor unit (MPU) and external system components, STPMIC1 also provides a DDR memory reference voltage power supply, a 500mA USB OTG power switch, and a universal power switch. The MPU can manage the power management IC through the I2C interface and other pins.
The four step-down converters of the power management IC are designed to ensure fast power supply transient response and precise output voltage control to cope with various operating conditions. At low loads, the pulse frequency modulation mode can improve power efficiency; during normal operation, pulse-width modulation (PWM) synchronization can minimize electromagnetic interference (EMI).
The boost converter has a bypass mode function that can power up to two USB ports. When using a battery or a low-cost 5V AC / DC adapter power supply, the voltage regulation is smooth.
Among the six LDO regulated power supply channels, one channel supplies power to the terminating resistor of the DDR3 memory interface, its bypass mode can also supply low-power DDR, and one channel provides automatic power detection function, which can provide The USB PHY chip supplies power, and the remaining four LDOs are general-purpose regulated power supplies.
In order to simplify the development of prototypes based on STPMIC1, STMicroelectronics also introduced the STEVAL-PMIC1K1 evaluation board for STPMIC1, which is easy to use, has buttons and digital I / O for starting the power management IC function, and connects regulators and power switches Interface header. The evaluation board also includes a USB encryption disk to configure the chip’s registers.
STPMIC1 is now in production and is available in a 5mm x 6mm x 0.8mm WFQFN 44-pin package.