General Description

The RT3624LE is a synchronous buck controller which supports 2 output rails and can fully meet Intel IMVP9.1 requirements. The RT3624LE adopts G-NAVPTM

Green Native AVP) which is Richtek’s proprietary topology derived from finite DC gain of EA amplifier with current mode control, making it easy to set the droop to meet all Intel CPU requirements of AVP

Adaptive Voltage Positioning). Based on the G-NAVPTM topology, the RT3624LE features a new generation of quick response mechanism (Adaptive Quick Response, AQR) to optimize AVP performance during load transient and reduce output capacitors. The RT3624LE integrates a high accuracy ADC for platform and function settings, such as ICCMAX, switching frequency or AQR trigger level. The RT3624LE provides VR Ready and thermal indicators. It also features complete fault protection functions including over-voltage (OV), under-voltage (UV), over-current

OC) and under-voltage lockout (UVLO).

Applications

 IMVP9.1 Intel GTUS/VCCSA Supply

 Desktop and Notebook Computer

 AVP Step-Down Converter

Features

 Intel IMVP9.1 Compliant

 4/3/2/1 Phase (GTUS VR) + 2/1 Phase (VCCSA VR) PWM Controller

 G-NAVPTM (Green Native Adaptive Voltage Positioning) Topology

 0.5 DAC Accuracy

 Differential Remote Voltage Sensing

 Built-in ADC for Platform Programming and Reporting

 Accurate Current Balance

 Diode Emulation Mode at Light Load Condition

 Fast Transient Response : Adaptive Quick Response (AQR)

 VR Ready Indicator

 OVP, OCP, UVP with Flag

 Switching Frequency Setting

 DVID Enhancement

 Acoustic Noise Suppression

 Zero Load-line

 Rail Disable

 Support Phase Doubler RT9637 for GTUS Rail Up to 6-Phase Operation (optional)

 Support SPS Application (optional)

 Soldering Good Detection

 RT3624LE : Support Address 03 and 02

 Small 52-Lead WQFN Package