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完整的数据资料 (PDF, 128kB) 英文 下载 The MAX1742 and MAX1842 evaluation kits (EV kits) provide a +1.8V adjustable output voltage from a +3V to +5.5V input source. The MAX1742 delivers up to 1A of output current, and the MAX1842 delivers up to 2.5A of output current. The MAX1742/MAX1842 are step-down switching regulators with internal synchronous-rectifiers that operate up to 1MHz, which minimizes external components. The devices feature resistor-programmable, fixed off-time current-mode operation for superior load- and line-transient response, and achieve efficiencies up to 95%. The MAX1742/MAX1842 EV kits can also be used to evaluate other output voltages by adding feedback resistors R1 and R2 or by using the jumper-selectable +1.1V, +1.5V, +1.8V, or +2.5V settings.

关键特性		应用/使用
1A Output Current for MAX1742 2.5A Output Current for MAX1842 Up to 1MHz Switching Frequency Up to 95% Efficiency Synchronous Rectification for Improved Efficiency No External Schottky Diode Required Output Voltage +1.1V, +1.5V, +1.8V, or +2.5V Selectable +1.1V to VIN Adjustable +3V to +5.5V Input Voltage Range < 1µA (typ) IC Shutdown Current Surface-Mount Construction Fully Assembled and Tested		5V或3.3V至低电压转换 芯片组供电 CPU I/O环 笔记本电脑和亚笔记本电脑

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