General Description

The RT9241A/B is a two-phase buck DC/DC controller integrated with all control functions for high performance processor VRM. The RT9241A/B drives 2 buck switching stages operating in 180 degree phase shift. The twophase 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

• Two-Phase Power Conversion

• 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 Times Channel Number)

• 100kHz Version (RT9241B) for Lower Switching Loss

• RoHS Compliant and 100 Lead (Pb)-Free

Applications

• Power Supply for Server and Workstation

• Power Supply for High Current Microprocessor