General Description

The RT9248A is a cost-effective multi-phase buck DC/DC controller integrated with all control functions for GHz CPU VRM. The RT9248A controls 2 or 3 buck switching stages operating in interleaved phase set automatically. The multiphase 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

• VRM9 & VRD10 DAC Output with Active Droop Compensation for Fast Load Transient

• Smooth VCORE Transition at VID Jump

• Multi-Level VID125 Input for VRM9 & VRD10 Selection

• Power Stage Thermal Balance by RDS(ON) Current Sense

• Hiccup Mode Over-Current Protection

• Programmable Switching Frequency (50kHz to 400kHz per Phase), Under-Voltage Lockout and Soft-Start

• High Ripple Frequency Times Channel Number

• RoHS Compliant and 100 Lead (Pb)-Free

Applications

• Intel® Processors Voltage Regulator: VRM9 and VRD10

• Low Output Voltage, High Current DC-DC Converters

• Voltage Regulator Modules

RT9248A属于集成电路（IC） > PMIC - 稳压器 - DC DC 开关式控制器。立绮科技制造生产的RT9248ADC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。