[Richtek]

General Description

The RT9237 is a multi-phase buck DC/DC controller integrated with all control functions for high performance processor VRM. The RT9237 drives 2, 3 or 4 buck switching stages operating in interleaved phase set automatically. The multi-phase architecture provides high output current while maintaining low power dissipation on power devices and low stress on input and output capacitors. The high equivalent operating frequency also reduces the component dimension and the output voltage ripple in load transient.

Features

• Multi-Phase Power Conversion with Automatic Phase Selection

• VRM 9.0 DAC Output with Active Droop Compensation for Fast Load Transient

• Precise Channel Current Sharing with Differential Sense Input

• Hiccup Mode Over Current Protection

• Programmable Under Voltage Lockout and Soft Start

• High Ripple Frequency, (Channel Frequency 200KHz) Times Channel Number

Applications

• Power Supply for Server and Workstation

• Power Supply for High Current Microprocessor