Intersil公司的ISL95813是一款完全支持Intel™微處理器VR12.6電源標準的單相電源控制器解決方案。該芯片可以通過CPU的高速接口實現對輸出電壓的可編程控制，同時也可以實現實時讀取芯片負載電流、電壓及芯片當前溫度。基于Intersil公司的R3™技術，該芯片PWM調制可以快速響應瞬變和建立時間比傳統的調制方式。本文通過總結ISL95813器件的特點，介紹器件、特性、應用方向及內部結構框圖，并給出參考設計實例原理圖、制板圖及元器件清單。
The ISL95813 single-phase controller provides a fully compliant VR12.6 power supply solution for Intel™ microprocessors. It provides a tightly regulated output voltage that is programmed through a high speed serial bus interface with the CPU. This interface also allows the CPU to acquire real-time information from the voltage regulator (VR), which includes load current and VR temperature.
Based on Intersil’s Robust Ripple Regulator (R3™) technology, the PWM modulator provides faster transient response and settling time when compared against traditional modulation schemes. Its variable frequency topology also allows for natural period stretching discontinuous conduction mode (DCM) for increased efficiency and power savings in light load situations.
The ISL95813 has several other key features that include: DCR current sensing with single NTC thermal compensation; discrete resistor current sensing; differential remote voltage feedback; and user-programmable boot voltage, IMAX, TMAX, voltage transition slew rate, and switching frequency.
ISL95813主要特性：
• Full VR12.6 specification compliance
• Wide input voltage range: 4.6V to 25V
• R3™ control architecture delivers excellent transient response and power state mode transitions
• Current monitor (IMON) with temperature compensation
• VRHOT# indicator for CPU protection
• Digitally selectable switching frequency:
- 425kHz, 550kHz, 700kHz with ECO and PRO options
• Enhanced light-load efficiency discontinuous conduction mode operation
• Ultra-small 20 lead 3mmx4mm QFN package
• Enable and power-good monitor
ISL95813應用方向：
• Notebook Computers
• Tablets, Ultrabooks™, and AIO
圖1. ISL95813內部方框圖
ISL95813實例原理圖：
圖2. ISL95813實例原理圖
ISL95813實例器件清單：
實例制板圖：
