RT3661AB
RT3661AB is Dual-Output PWM Controller manufactured by Richtek.
Description
The RT3661AB is a dual-output PWM controller with 2 integrated drivers, and it is pliant with AMD SVI2 Voltage Regulator Specification to support both CPU core (VDD) and Northbridge portion of CPU (VDDNB). The RT3661AB 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) VDD/VDDNB requirements. The droop is easily programmed by setting the DC gain of the error amplifier. With proper pensation, the load transient response can achieve optimized AVP performance. The controller also uses the interface to issue VOTF plete and to send digitally encoded voltage and current values for the VDD/VDDNB domains. The RT3661AB can operate in diode emulation mode to enhance the light load efficiency. And it provides the current gain adjustment capability by pin setting. The RT3661AB provides power good indication, thermal indication (VRHOT_L), and it features plete fault protection functions including over current, over voltage, under voltage.
Features
- 1-Phase (VDD) + 1/0-Phase (VDDNB) 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 ply 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 Mobile CPU
- Laptop puter
Simplified Application Circuit
To CPU
VRHOT_L
PHASE
SVD SVT
PHASE_NB
MOSFET MOSFET
VVDD VVDDNB
Copyright © 2019 Richtek Technology Corporation. All rights reserved.
DS3661AB-05 May 2019 is a registered...
