Dual Out−of−Phase Synchronous Buck Controller with Remote Sense

The CS5421 is a dual N−channel synchronous buck regulator controller. It contains all the circuitry required for two independent buck regulators and utilizes the V2™ control method to achieve the fastest possible transient response and best overall regulation, while using the least number of external components. The CS5421 features out−of−phase synchronization between the channels, reducing the input filter requirement. The CS5421 also provides undervoltage lockout, Soft Start, built in adaptive FET non−overlap and remote sense capability. The part is available in a 16 Lead SO Narrow package allowing the designer to minimize solution size.

Features

• V2 Control Topology

• 150 ns Transient Response

• Programmable Soft Start

• 25 ns Gate Rise and Fall Times (with 1.0 nF load)

• 40 ns Adaptive FET Nonoverlap Time

• 100 Duty Cycle for Enhanced Transient Response

• Internal Slope Compensation

• 1.0 V 0.8 and 2.0 Error Amplifier References

• 150 kHz to 750 kHz Programmable Frequency Operation

• Switching Frequency Set by Single Resistor

• Out−Of−Phase Synchronization Between the Channels Reduces the Input Filter Requirement

• Undervoltage Lockout

• On/Off Control Through Use of the COMP Pins

CS5421属于集成电路（IC） > PMIC - 稳压器 - DC DC 开关式控制器。安森美半导体公司制造生产的CS5421DC-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。