ST STPMIC1低功耗微处理器功率管理解决方案

ST公司的 STPMIC1是用于微处理器单元的高度集成功率管理集成电路,具有先进的低功耗特性,由主处理器通过I²C和IO接口来控制.STPMIC1稳压器设计用来给应用处理器和外接系统外设如DDR,闪存和其它系统设备等供电.升压转换器能给多达3个USB端口(两个500mA主USB和100mA USB OTG)供电.输入电压范围从2.8V到5.5V,有4路可调整的通用LDO,1个LDO用于DDR3终端(沉-源),旁路模式用于低功耗DDR或通用LDO.1个LDO用于USB PHY电源和自动电源检测.1个基准电压LDO用于DDR存储器.4个自适应恒定时间（COT）降压SMPS转换器,带旁路模式的5.2V/1.1A升压SMPS用于5V输入或电池输入,1个和500 mA USB OTG兼容的功率开关.主要用在嵌入微处理器单元的电源管理,可穿戴和IoT,手持设备,人机接口,智能家居等.本文介绍了STPMIC1主要特性,典型应用电路和评估板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 productsbased on high integrated application processor designs requiring low power and highefficiency.
The device integrates advanced low power features controlled by a host processorvia I²C and IO interface.
The STPMIC1 regulators are designed to supply power to the application processoras well as to the external system peripherals such as: DDR, Flash memories andother system devices.
The boost converter can power up to 3 USB ports (two 500 mA host USB and one100 mA USB OTG). Its advanced bypass architecture allows the smooth regulationof VBUS for USB ports from a battery as well as low-cost consumer 5 V AC-DCadapters.
4 buck SMPS are optimized to provide an excellent transient response and an outputvoltage precision for a wide range of operating conditions, high full range efficiency (ηup to 90%) by implementing a low power mode with a smooth transition from PFM toPWM and also an advanced PWM synchronization technique with an integrated PLLfor 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...