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 Home > Products > Switching Regulators > Vcore > Vcore Controller > RT8168B
 

Dual Single-Phase PWM Controller for CPU and GPU Core Power Supply

RT8168B

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Features
Dual Single-Phase PWM Controller for CPU Core and GPU Core Power
IMVP7 Compatible Power Management States
Serial VID Interface
G-NAVPTM Topology
AVP for CPU VR Only
0.5% DAC Accuracy
0.8% System Accuracy
Differential Remote Voltage Sensing
Built-in ADC for Platform Programming

SETINI/SETINIA for CPU/GPU Core VR Initial Startup Voltage

TMPMAX to Set Platform Maximum Temperature

ICCMAX/ICCMAXA for CPU/GPU Core VR Maximum Current
Power Good Indicator : VR_READY/VRA_READY for CPU/GPU Core Power
Description

The RT8168B is a dual single-phase PWM controller with integrated MOSFET drivers, compliant with Intel IMVP7 Pulse Width Modulation Specification to support both CPU core and GPU core power. This part adopts G-NAVPTM (Green-Native AVP), which is a Richtek proprietary topology derived from finite DC gain compensator in constant on-time control mode. G-NAVPTM makes this part an easy setting PWM controller to meet all Intel AVP (Active Voltage Positioning) mobile CPU/GPU requirements. The RT8168B uses SVID interface to control an 8-bit DAC for output voltage programming. The built-in high accuracy DAC converts the received VID code into a voltage value ranging from 0V to 1.52V with 5mV step voltage. The system accuracy of the controller can reach 0.8%. The RT8168B operates in continuous conduction mode or diode emulation mode, according to the SVID command. The maximum efficiency can reach up to 90% in different operating modes according to different load conditions. The droop function (load line) can be easily programmed by setting the DC gain of the error amplifier. With proper compensation, the load transient response can achieve optimized AVP performance.

The output voltage transition slew rate is set via the SVID interface. The RT8168B supports both DCR and sense resistor current sensing. The RT8168B provides VR_READY and thermal throttling output signals for IMVP7 CPU and GPU core. This part also features complete fault protection functions including over voltage, under voltage, negative voltage, over current and thermal shutdown.

The RT8168B is available in a WQFN-40L 5x5 small footprint package.

Applications
IMVP7 Intel CPU/GPU Core Power Supply
Laptop Computers
AVP Step-Down Converter
Datasheets
Title Description Size Last Updated
DS8168B-01.pdf
Datasheets for RT8168B 490 KB 2015 May
Reliability
Title Description Size Last Updated
RT8168B.pdf
Reliability Report for RT8168B 29 KB 2012 Mar