RT8841应用电路及参数

4/3/2/1-Phase PWM Controller for High-Density Power Supply

The RT8841 is a 4/3/2/1-phase synchronous buck controller with 2 integrated MOSFET drivers for VR11 CPU power applicaTIon. RT8841 uses differenTIal inductor DCR current sense to achieve phase current balance and acTIve voltage posiTIoning. Other features include adjustable operating frequency, adjustable soft start, power good indication, external error-amp compensation, over voltage protection, over current protection and enable/shutdown for various applications. RT8841 comes to a small footprint with WQFN-40L 6x6 package

Features

• 12V Power Supply Voltage
• 4/3/2/1-Phase Power Conversion
• 2 Embedded MOSFET Drivers
• Internal Regulated 5V Output
• VID Tables for Intel VRD11/VRD10.x and AMD K8, K8_M2 CPUs
• Continuous Differential Inductor DCR Current Sense
• Adjustable Soft Start
• Adjustable Frequency
• Power Good Indication
• Adjustable Over Current Protection
• Over Voltage Protection
• Small 40-Lead WQFN Package
• RoHS Compliant and 100% Lead(Pb)-Free

Application

• Desktop CPU Core Power
• Low Voltage, High Current DC/ DC Converter

Typical Applications Circuit