线性技术Corporation announces the LTC3815, a high efficiency 6A monolithic synchronous step-down DC/DC converter with an I²C-based PMBus interface for digital power system management (PSM). The LTC3815’s simplified and intuitive PMBus “Lite” command set makes it simple to use. The digital interface provides programming and read back of voltage, current, temperature and faults; all supported by LTpowerPlay™ software. This interface allows the output voltage to be margined over a ±25% range with 0.1% resolution. The default output voltage is set with a single external resistor and will power up to this voltage with or without the serial interface.
LTC3815通过为较低电流应用提供单片设备，在我们流行的PSM控制器和多通道管理器系列上构建。其输入工作电源电压范围从2.25V到5.5V，适合于2.5V，3.3V或5V导轨或锂离子电池的运行。输出电压可从VIN的0.4V编程到72％，或者可以使用外部电压参考设置，使其非常适合智能能源转换，ASIC/FPGA功率，分布式功率和负载点应用程序。
The LTC3815 uses a phase-lockable controlled on-time, current mode architecture providing an extremely fast transient response and enabling operation at the low duty cycles necessary to regulate low output voltages at high switching frequencies. The operating frequency is programmable from 400kHz to 3MHz with an external resistor or for switching noise sensitive applications, it can be synchronized to an external clock over the same range.
集成的差分放大器提供了真正的远程输出电压传感，从而实现了高精度调节，而与板IR电压下降无关。其他功能包括用于2相操作的时钟输出，功率良好的信号，可选的强制连续或不连续模式以及快速的1ms启动时间。
LTC3815可在38铅4mm x 6mm QFN包装中获得，工作连接温度范围为-40°C至125°C。1,000件价格的起价为$ 4.71。有关更多信息，请访问www.linear.com/product/ltc3815
Summary of Features: LTC3815
PMBusLite Compliant Serial Interface
输出电压编程：+/- 25％，分辨率为0.1％
Telemetry Includes VIN, IIN, VOUT, IOUT, Temperature & Fault
VIN Range: 2.25V to 5.5V
VOUT范围：VIN的0.4V至72％
Operating Frequency Range of 400kHz to 3MHz
可同步到外时钟
Remote Output Voltage Sense
Power Good Output Signal
快速1ms启动时间
线性技术
linear.com
Filed Under:电力电子技巧
