General Description The MAX668 evaluation kit EV kit combines a con stant frequency pulse width modulation PWM step up controller with an external N channel MOSFET and Schottky diode to provide a regulated output voltage The EV kit accepts a +3V to VOUT input and converts it to a +12V output for currents up to 1A with greater than conversion efficiency The EV kit operates at 500kHz allowing the use of small external components The MAX668 EV kit is a fully assembled and tested sur face mount circuit board This EV kit can also be con figured for the application circuits listed in the EV Kit Application Circuit Capabilities table For input voltages below 3V and down to 8V replace the MAX668 with a MAX669 The MAX669 must always operate in boot strapped mode JU2 shunt across pins and
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Niveau: Secondaire, Lycée, Terminale General Description The MAX668 evaluation kit (EV kit) combines a con- stant-frequency, pulse-width-modulation (PWM) step- up controller with an external N-channel MOSFET and Schottky diode to provide a regulated output voltage. The EV kit accepts a +3V to VOUT input and converts it to a +12V output for currents up to 1A, with greater than 90% conversion efficiency. The EV kit operates at 500kHz, allowing the use of small external components. The MAX668 EV kit is a fully assembled and tested sur- face-mount circuit board. This EV kit can also be con- figured for the application circuits listed in the EV Kit Application Circuit Capabilities table. For input voltages below 3V and down to 1.8V, replace the MAX668 with a MAX669. The MAX669 must always operate in boot- strapped mode (JU2 shunt across pins 1 and 2). Features ' +3V to VOUT Input Range (as shipped) ' +12V or Adjustable Output Voltage ' Output Current Up to 1A ' N-Channel External MOSFET ' 4µA IC Shutdown Current ' 500kHz Switching Frequency ' Surface-Mount Components ' Fully Assembled and Tested E va lu a te s: M A X 6 6 8 /M A X 6 6 9 MAX668 Evaluation Kit _____________________________________
- ju2
- vcc
- max668
- pin header
- selectable jumper
- output voltage
- ev kit
- location ldo