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RT8848C 是一款 8/7/6/5/4/3/2/1 多相同步降压控制器，针对高性能图形微处理器进行优化，并通过 PWM-VID 接口支持 nVidia OVR4i+ 规范。RT8848C 采用 AC G-NAVP<sup>TM</sup> (Green Native AVP)，这是立锜专有的拓扑，由内部 GM 放大器的有限 DC 增益搭配电流模式控制所衍生。通过采用 AC G-NAVP<sup>TM</sup> 拓扑，RT8848C 的工作频率会随 VID、负载与输入电压而变化，即使在 CCM 下亦可进一步提升效率。此外，对于电流检测应用，RT8848C 可支持来自电感的传统 DCR 网络电流检测，或可直接提供电流监测信号 (IMON) 的智能功率级 (SPS)。<br /><br />RT8848C 具备外部参考输入与 PWM-VID 动态输出电压控制，其中输出电压会被调节并跟踪外部输入参考电压。RT8848C 可通过 PINSETx 引脚设置内部 RAMP 振幅，以优化稳定性与负载瞬态性能。RT8848C 亦提供完整的故障保护功能，包括过压保护 (OVP)、欠压保护 (UVP)、通道过电流限制 (CH_OC)、总输出电流保护 (SOC) 与过温保护 (OTP)。建议结温为 −40°C 至 125°C。
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<li class="mv5"> Multi-Phase PWM Controller<br /> </li><li class="mv5"> PWM-VID Dynamic Voltage Control<br /> </li><li class="mv5"> Support 1.8V PWM-VID Interface<br /> </li><li class="mv5"> Power State Indicator<br /> ► LPC (Low Phase Count), PSI = Low<br /> ► APS (Auto Phase Shedding), PSI = Mid<br /> ► HPC (High Phase Count), PSI = High<br /> </li><li class="mv5"> External Reference Input Control<br /> </li><li class="mv5"> 8/7/6/5/4/3/2/1 Phase Hardware Setting<br /> </li><li class="mv5"> Adjustable Soft-Start Time<br /> </li><li class="mv5"> Adjustable Switching Frequency<br /> </li><li class="mv5"> Adjustable Phase Current Balance<br /> </li><li class="mv5"> Support Standby Mode<br /> </li><li class="mv5"> UVP/OVP/OTP/SOC/CH_OC/TSEN Protection<br /> </li><li class="mv5"> Adjustable Protection Thresholds<br /> </li><li class="mv5"> Power Good Indicator<br /> </li><li class="mv5"> ADC Reporting for IMON, TSEN and VSEN<br /> </li><li class="mv5"> Support I<sup>2</sup>C Interface for Programming<br /> </li><li class="mv5"> RoHS Compliant and Halogen Free</li>
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<li class="mv5"> GPU Core Power for OVR4i+ Spec</li>
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