General Description

The RT3662EB is a single channel PWM controller with

2 integrated drivers, and it is compliant with AMD SVI2

Voltage Regulator Specification to support GPU power

VDDC). The RT3662EB features CCRCOT (Constant

Current Ripple Constant On-Time) with G-NAVP

Green-Native AVP), which is Richtek's proprietary

topology. G-NAVP makes it an easy setting controller

to meet all AMD AVP (Adaptive Voltage Positioning)

VDDC requirements. The droop is easily programmed

by setting the DC gain of the error amplifier. With

proper compensation, the load transient response can

achieve optimized AVP performance. The controller

also uses the interface to issue VOTF Complete and to

send digitally encoded voltage and current values for

the VDDC domains. The RT3662EB can operate in

diode emulation mode to enhance the light load

efficiency. And it provides the current gain adjustment

capability by pin setting. The RT3662EB provides

power good indication, thermal indication (VRHOT_L),

and it features complete fault protection functions

including, over current, over voltage and under voltage.

Features

? 2/1-Phase (VDDC) PWM Controller

? 2 Embedded MOSFET Drivers

? G-NAVPTM Topology

? Support Dynamic Load-Line and Zero Load-Line

? Diode Emulation Mode at Light Load Condition

? SVI2 Interface to Comply with AMD Power

Management Protocol

? Adjustable Current Gain Capability

? DVID Enhancement

? 0.5 DAC Accuracy

? Differential Remote Voltage Sensing

? Build-in ADC for Pin Setting Programming,

Thermal Indication and VOUT, IOUT Reporting

? Fast Transient Response

? Power Good Indicator

? Thermal Indicator (VRHOT_L)

? OVP, UVP and UVLO

? Over Current Protection

Applications

? AMD SVI2 GPU Core Power

? Laptop Computer