[原创] Linear LTC3815 6A DC降压电源解决方案

Linear公司的LTC3815是具有数字电源系统管理的6A单片高效同步DC/DC降压转换器,采用锁相控制即时电流模式架构,集成了13位ADC,输入电压2.25V - 5.5V,输出电压从0.4V到72% VIN,主要用在智能效率电源转换,ASIC/FPGA/处理器电源,分布式电源系统和点负载电源转换.本文介绍了LTC3815主要特性,框图,多种应用电路以及评估板DC2065A主要特性,电路图和材料清单.

The LTC?3815 is a high efficiency, 6A monolithic synchronousbuck regulator using a phase lockable controlledon-time, current mode architecture. The output voltageis programmable from 0.4V to 72% of VIN with a singleexternal resistor or an external voltage reference throughthe reference input (REF) pin. The output voltage can bemargined up or down up to ±25% with 0.1% resolutionvia a PMBus-compliant serial interface. The serial interfacecan also be used to read back fault status and bothtime-averaged (~4ms) and peak input/output current,input/output voltage and temperature. System configurationand monitoring is supported by the LTpowerPlay™development system.

The architecture provides extremely fast transient responseand allows operation at the very low on-times required toregulate low output voltages at high switching frequencies.
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