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完整的数据资料 (PDF, 112kB) 英文 下载 The MAX686 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that contains two separate switching-regulator circuits. The first circuit converts a +0.8V to +18V battery voltage to a +18V LCD bias voltage for currents up to 20mA. The second circuit converts a +0.8V to +12V battery voltage to a-17V voltage for currents up to 20mA. The MAX686 requires a +2.7V to +5.5V supply at VIN, but the inductor can be powered from as low as +0.8V. The device features an internal N-channel MOSFET switch, programmable current limit, and internal 6-bit DAC for digital adjustment of the output voltage. The MAX686 EV kit provides low quiescent current and high efficiency for maximum battery life. Operation up to 300kHz allows the use of a tiny surface-mount inductor.

关键特性		应用/使用
Output Voltage: +18V Typical Positive Output (or +12.6V to +24V adjustable with up/down) -17V Typical Negative Output (or -22.7V to -11.4V adjustable with up/down) Battery Input Voltage: +0.8V to +18V (Positive Output) +0.8V to +12V (Negative Output) +2.7V to +5.5V VIN Supply Range Up to 20mA Output Current 6-Bit DAC-Controlled Output Voltage Internal 0.5A, 28V N-Channel Switch 1.3µA IC Shutdown Current Up to 300kHz Switching Frequency Surface-Mount Components Fully Assembled and Tested		笔记本电脑 掌上电脑 PDA及其它手持设备 便携式数据收集终端 LCD正或负偏置 变容调谐二极管偏置

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