ST公司的STPMIC1是全集成电源管理集成电路,设计用于需要低功耗和高效率的高度集成的应用处理器.器件集成了由主处理器通过I²C和IO接口控制的先进低功耗特性,支持给应用处理器和外部系统外设如DDR,闪存和其它系统设备供电.升压转换器能多达3个USB端口供电(两个500mA主USB和一个100mA USB OTG).4个降压开关电源(SMPS)在广泛的工作条件下有最佳的瞬态特性和输出精度,效率高达90%,从而实现低功耗模式并从PFM到PWM平滑过度,具有先进的PWM同步技术和集成的PLL,以得到较好的噪音(EMI性能).输入电压从2.8 V 到 5.5 V.它的用户可编程非易失存储器(NVM)支持各种应用.主要用在嵌入微处理器单元电源管理,可穿戴和物联网 (IoT),手持设备,人机接口,智能家庭.本文介绍了STPMIC1主要特性,升压和开关框图,多种应用框图,以及评估板STEVAL-PMIC1K1主要特性,电路图,材料清单和PCB设计图.

The STPMIC1 is a fully integrated power management IC designed for products based on high integrated application processor designs requiring low power and high efficiency. The device integrates advanced low power features controlled by a host processor via I²C and IO interface.

The STPMIC1 regulators are designed to supply power to the application processor as well as to the external system peripherals such as: DDR, Flash memories and other system devices.

The boost converter can power up to 3 USB ports (two 500 mA host USB and one 100 mA USB OTG). Its advanced bypass architecture allows the smooth regulation of VBUS for USB ports from a battery as well as low-cost consumer 5 V AC-DC adapters.

4 buck SMPS are optimized to provide an excellent transient response and an output voltage precision for a wide range of operating conditions, high full range efficiency (η up to 90%) by implementing a low power mode with a smooth transition from PFM to PWM and also an advanced PWM synchronization technique with an integrated PLL for a better noise (EMI performance).

STPMIC1主要特性：

• Input voltage range from 2.8 V to 5.5 V
• 4 adjustable general purpose LDOs
• 1 LDO for DDR3 termination (sink-source), bypass mode for low power DDR or as general purpose LDO
• 1 LDO for USB PHY supply with automatic power source detection
• 1 reference voltage LDO for DDR memory
• 4 adjustable adaptive constant on-time (COT) buck SMPS converters
• 5.2 V / 1.1 A boost SMPS with bypass mode for 5 V input or battery input
• 1 power switch 500 mA USB OTG compliant
• 1 power switch 500 mA/1000 mA general purpose
• User programmable non-volatile memory (NVM), enabling scalability to support a wide range of applications
• I²C and digital IO control interface
• WFQFN 44L (5x6x0.8)

STPMIC1应用:

• Power management for embedded micro processor units
• Wearable and IoT
• Portable devices
• Man-machine interfaces
• Smart home
• Power management unit companion chip of the STM32MP1 MPU
The STPMIC1 has a non-volatile memory (NVM) that enables scalability to support a wide range of applications:
• Default output voltage, POWER_UP/POWER_DOWN sequence, protection behavior, auto turn-on functionality, I2C slave address
• The STPMIC1A and STPMIC1B are pre-programmed devices to support the STM32MP1 series application processor versions
• The STPMIC1C is not a programmed device to support custom applications
• Straightforward NVM (re)programming via I2C to facilitate mass production directly in target applications

图1.STPMIC1典型应用电路

图2.STPMIC1升压和开关框图

图3.STPMIC1带USB OTG端口和USB主端口的电池供电应用电路

图4.STPMIC1带单个USB OTG端口的电池供电应用电路

图5.STPMIC1带USB OTG端口和两个USB主端口的5VDC供电应用电路

评估板STEVAL-PMIC1K1

The STEVAL-PMIC1K1 evaluation board is designed for testing and evaluation of the STPMIC1 power management IC for application processors requiring low power and high efficiency. The STPMIC1 integrates a range of regulators, converters, and switches to manage the power requirements of STM32MP1 series microprocessors as well as other application processors and peripherals such as DDR, Flash, USB and other system devices.

The evaluation board is highly configurable and can be programmed via I²C to suit many power supply requirements of MPUbased applications such as IoT, human machine interfaces, Smart Home, etc.

The 6.1x7.2cm evaluation board is provided with 2.54mm header for each regulators output, some jumpers are present on the board for fast and easy setup accordingly to the application needs. For each output a TP is present for sensing the output voltage. User management buttons, Reset, Wakeup and Ponkey, are available for easy work. Dedicated connectors for digital section are present for I/O and I²C communication up to 1Mb/s.

图6. 评估板STEVAL-PMIC1K1外形图

图7. 评估板STEVAL-PMIC1K1电路图(1)

图8. 评估板STEVAL-PMIC1K1电路图(2)
评估板STEVAL-PMIC1K1材料清单:



图9. 评估板STEVAL-PMIC1K1 PCB设计装配图

图10. 评估板STEVAL-PMIC1K1 PCB设计顶层图

图11. 评估板STEVAL-PMIC1K1 PCB设计中间层1

图12. 评估板STEVAL-PMIC1K1 PCB设计中间层2

图13. 评估板STEVAL-PMIC1K1 PCB设计底层
详情请见:
https://www.st.com/content/ccc/resource/technical/layouts_and_diagrams/schematic_pack/group1/18/f9/98/f5/87/3d/41/6a/STEVAL-PMIC1K1_SCHEMATIC/files/steval-pmic1k1_schematic.pdf/jcr:content/translations/en.steval-pmic1k1_schematic.pdf
和https://www.st.com/content/ccc/resource/technical/document/bill_of_materials/group1/1b/96/00/93/2a/00/47/69/STEVAL-PMIC1K1_BOM/files/steval-pmic1k1_bom.pdf/jcr:content/translations/en.steval-pmic1k1_bom.pdf
en.steval-pmic1k1_schematic.pdf
en.steval-pmic1k1_bom.pdf
stpmic1.pdf