Synchronizing Current Mode PWM for Subscriber Line Interface Circuits (SLICs)

The ISL6401 adjustable frequency, low power, pulse width modulating (PWM) current mode controller is designed for a wide range of DC/DC conversion applications including boost, flyback, and isolated output configurations. The device is optimized to provide a high performance, low-cost solution for Ringing SLIC (RSLIC) ring and talk power supplies. An integrated inverter allows for easy design of negative voltage regulation circuits with a minimal amount of external components. Internal soft-start minimizes start-up stress without any external components. Peak current mode control effectively handles Ring trip transients and provides inherent overcurrent protection.

Features

• Positive and Negative Output Regulation

• Starting Supply Current . . . . . . . . . . . . . . . . . 100A (typ.)

• Quiescent Current . . . . . . . . . . . . . . . . . . . . . . 55A (typ.)

• Output Frequency Range. . . . . . . . . . . . 50kHz to 600kHz

• External Clock Synchronization

• Fast Transient Response with Peak Current Mode Control

• Internal Soft-Start

• Drives N-Channel MOSFET

• Logic Level Shutdown

• Leading Edge Blanking

• 1 Tolerance Voltage Reference Over Line and Temperature

• Pb-Free Available (RoHS Compliant)

Applications

• VoIP/VoDSL Ringer and Off-Hook Voltage Generators

• Multi-Output Flyback Supplies

• Cable and DSL Modems

• Set-Top Boxes

• Wireless Local Loops

• LMDH and FTTH Supplies

• Boost Regulators

• Routers

ISL6401属于集成电路（IC） > PMIC - 稳压器 - DC DC 开关式控制器。瑞萨科技有限公司制造生产的ISL6401DC-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。