DESCRIPTION

The LX1672 is a highly integrated power supply controller IC featuring two PWM switching regulator stages with an additional onboard linear regulator driver.

The two constant frequency voltagemode PWM phases can be easily configured as a single Bi-Phase high current output, two independently regulated outputs, or as a DDR memory I/O supply with a tracking DDR termination voltage supply. Power loss and noise, due to the ESR of the input capacitors, are minimized by operating each PWM output 180° out of phase. This architecture also minimizes capacitor requirements while maximizing regulator response.

KEY FEATURES

◾ Up to Three Independently Regulated Outputs

◾ DDR Termination Compliant

◾ Bi-phase Current Sharing

◾ Outputs As Low As 0.8V Generated From An Internal 1 Reference

◾ Multiphase High Current Output Reduces Required Capacitance

◾ Integrated High Current MOSFET Drivers

◾ 300KHz, 500KHz and 600KHz High Frequency Operation Minimizes External Component Requirements

◾ Independent Phase Programmable Soft-Start and Power Sequencing

◾ Adjustable Linear Regulator Driver Output

◾ No current-sense resistors

APPLICATIONS/BENEFITS

◾ Multi-Output Power Supplies

◾ Video Card Power Supplies

◾ DDR, VDDQ and Termination Supply

◾ PC Peripherals

◾ Portable PC Processor and I/O Supply

LX1672-03CPW属于集成电路（IC） > PMIC - 稳压器 - DC DC 开关式控制器。美高森美公司制造生产的LX1672-03CPWDC-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。