RT8876A(2012) Datasheet PDF - Richtek Technology

General Description

   The RT8876A is a VR12/IMVP7 compliant CPU power controller which includes two channels : a 3/2/1 phase with 3 integrated drivers synchronous Buck controller for the CORE VR, and a single phase Buck controller for the AXG VR. The RT8876A adopts G-NAVPTM (Green Native Adaptive Voltage Positioning), which is Richtek's proprietary topology derived from a finite DC gain compensator with current mode control, making it an easy setting PWM controller, meeting all Intel CPU requirements of AVP. Based on the G-NAVPTM topology, the RT8876A also features a quick response mechanism for optimizing AVP performance during load transient. 

Features

• VR12/IMVP7 Compatible Power Management

• 3/2/1 Phase for CORE VR and Single Phase for AXG

   VR

• 3 Embedded MOSFET Drivers at the CORE VR

• G-NAVPTM Topology

• Serial VID Interface

• 0.5% DAC Accuracy

• Differential Remote Voltage Sensing

• Built-in ADC for Platform Programming

• Accurate Current Balance

• System Thermal Compensated AVP

• Diode Emulation Mode at Light Load Condition for

   Single Phase

• Fast Transient Response

• 1.1VINITIAL / 0.0VINITIAL for both Rails at Startup

• Power Ready Indicator

• Thermal Throttling

• Current Monitor Output

• OVP, UVP, OCP, OTP, UVLO

• External No-load Offset Setting for both Rails

• DVID Enhancement

• 56-Lead WQFN Package

• RoHS Compliant and Halogen Free

Applications

• VR12/IMVP7 Intel Core Supply

• Notebook/ Desktop Computer/ Servers Multi-phase CPU

   Core Supply

• AVP Step-Down Converter