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FULL DATA SHEET (PDF, 55kB) Download   E-Mail The MAX629 evaluation kit (EV kit) contains two separate switching-regulator circuits. The first circuit converts a +0.8V to VOUT battery voltage to a +24V LCD backplane bias voltage for currents up to 20mA. The second circuit converts a +0.8V to +12V battery voltage to a -20V voltage for currents up to 20mA. The MAX629 requires a +2.7V to +5.5V supply at VCC, but the inductor can be powered from as low as 0.8V. Both output voltages can be adjusted by changing the feedback-resistor values. The MAX629 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. This EV kit is a fully assembled and tested surface-mount circuit board.

Key Features		Applications/Uses
Output Voltage: +24V Positive -20V Negative Battery Input Voltage: +0.8V to VOUT (Positive Output) +0.8V to +15V (Negative Output) +2.7V to +5.5V VCC Supply Range Up to 20mA Output Current Internal 28V N-Channel Switch 1µA (Max) IC Shutdown Current Up to 300kHz Switching Frequency Surface-Mount Components Fully Assembled and Tested		2-Cell and 3-Cell Battery-Powered Applications High-Efficiency DC-DC Boost Converters Palmtop Computers Positive or Negative LCD Bias Generators Varactor Tuning Diode Bias

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