[原创] Maxim MAX77503 1．5A 94%效率降压转换器解决方案

Maxim公司的MAX77503是同步1.5A 94%效率降压DC／DC转换器,工作输入电压3V到14V,输出电压在0.8V到5V间通过I2C串口可调,每步50mV,主要用在2电池／3电池高密度电源,手持锂+／锂离子电池供电设备,无人机,HD照相机和笔记本电脑.本文介绍了MAX77503主要特性和优势,框图和多种应用电路,以及评估板MAX77503 EVK优势和特性,电路图,材料清单和PCB设计图.

1.5A buck converter with 94% efficiency for 2-cell/3-cell battery applications

The MAX77503 is a synchronous 1.5A step-down DCDCconverter optimized for portable 2-cell and 3-cell battery-operated and USB-C applications. The converter operateson an input supply between 3V and 14V. Outputvoltage is adjustable between 0.8V and 5V in 50mV stepsthrough an I2C serial interface or 1.55V to 99% of the supplyvoltage with external feedback resistors. Factory-programmeddefault voltages of 1.2V, 1.8V, and 3.3V are offeredto reduce component count for common rails. Thedevice features a low-IQ SKIP mode which allows excellentefficiency at light loads.

Dedicated enable and power-OK pins allow simple hardwarecontrol. An I2C serial interface is optionally used forfull configuration and control for dynamic voltage scalingand system power optimization.
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