NCP5425中文资料双同步降压控制器数据手册ONSEMI规格书

描述 Description

The NCP5425 is a highly flexible dual buck controller with internal gate drivers that can be used with two input power supplies and one or two outputs in mutiple configurations.The part contains all the circuitry required for two independent synchronous dual NFET buck regulators utilizing a feed forward voltage mode control method. The NCP5425 can run from a single supply ranging from 4.6 to 12 volts and support a single two phase or dual single phase outputs.When used as a dual output controller, the second output tracks voltage transients from the first.Power blanking for low noise applications is supported as well as independent cycle-by-cycle current limiting.The part is available in a 20 pin TSSOP package allowing the designer to minimize PCB area.

特性 Features

• Operation Over 4.6 to 13.2 Volts
• Dual Synchronous Buck Design
• Programmable Power Sharing and Budgeting from Two Independent Supplies
• 0.8 Volt +/- 1% Reference for Low Voltage Outputs
• 1.5A Peak Power Drive
• Switch Blanking for Noise Sensitive Applications through use of ROSC Pin
• Programmable Frequency, 150 kHz to 750 kHz Operation
• Programmable Soft-Start
• Cycle-to-Cycle Overcurrent Protection
• Independent Programmable Current Limits
• 100% Duty Cycle for Fast Transient Response
• Internal Slope Compensation
• Out-of-Phase Synchronization between the Controllers
• Configurable as a Single Two Phase Output or Two Single Phase Outputs
• These are Pb-Free Devices
• Input Undervoltage Lockout
• On/Off Enable through use of the COMP Pins
• Power Supply Sequencing

简介

NCP5425属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由制造生产的NCP5425DC-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。