[原创] Renesas ISL70005SEH抗辐射双输出点负载稳压器解决方案

Renesas公司的ISL70005SEH和ISL73005SEH是抗辐射双输出点负载集成的同步降压和低压降稳压器,包括了高效率同步降压稳压器和低噪音低压降(LDO)稳压器.降压稳压器采用兵电压模式控制架构,采用电阻可调整的开关频率在100kHz到1MHz.外接可调整的回路补偿在稳定性和输出动态范围间达到最佳.内部同步功率开关优化了高效率和极好的热性能.LDO完全独立于开关稳压器进行配置.它采用NMOS通过器件和单独芯片偏压电压(L_VCC)来驱动它的栅极,使得LDO在L_VIN输入工作在非常低的电压.LDO沉和源电流连续为1A,使它非常适合给DDR存储器供电.工作温度-55℃到+125℃,主要用在低功耗FPGA核,辅助和I/O电源的点负载(POL),DDR存储器电源VDDQ和VTT轨,卫星载荷的分布使电源系统.本文介绍了ISL70005SEH主要特性,DDR2存储器电源解决方案和应用电路图,以及评估板ISL70005SEHDEMO1Z主要特性,框图,电路图,材料清单和PCB设计图.

The ISL70005SEH and ISL73005SEH are radiation hardened dual output Point-of-Load (POL) regulators combining the high efficiency of a synchronous buck regulator with the low noise of a Low Dropout (LDO) regulator. They are suited for systems with 3.3V or 5V power buses and can support continuous output load currents of 3A for the buck regulator and ±1A for the LDO.

The buck regulator uses a voltage mode control architecture and switches at a resistor adjustable frequency of 100kHz to 1MHz. Externally adjustable loop compensation allows for an optimum balance between stability and output dynamic performance.The internal synchronous power switches are optimized for high efficiency and excellent thermal performance.
..

查看全文