原标题：Intersil ISL95813单级性CPU电源评估板设计方案

　　Intersil公司的ISL95813是一款完全支持Intel™微处理器VR12.6电源标准的单相电源控制器解决方案。该芯片可以通过CPU的高速接口实现对输出电压的可编程控制，同时也可以实现实时读取芯片负载电流、电压及芯片当前温度。基于Intersil公司的R3™技术，该芯片PWM调制可以快速响应瞬变和建立时间比传统的调制方式。本文通过总结ISL95813器件的特点，介绍器件、特性、应用方向及内部结构框图，并给出参考设计实例原理图、制板图及元器件清单。

　　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应用方向：

　　• Notebook Computers

　　• Tablets, Ultrabooks™, and AIO

　　图1. ISL95813内部方框图

　　ISL95813实例器件清单：