The MIC4723 is a high efficiency PWM buck (step-down) regulator that provides up to 3A of output current. The MIC4723 operates at 2MHz and has proprietary internal compensation that allows a closed loop bandwidth of over 200kHz. The low onresistance internal P-Channel MOSFET of the MIC4723 allows efficiencies up to 94%, reduces external component count and eliminates the need for an expensive external current sense resistor. The MIC4723 operates from a 3V to 5.5V input and its output is adjustable down to 1V. The devices can operate with a maximum duty cycle of 100% for use in low-dropout applications.
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The MIC4723 evaluation board requires an input power source that is able to deliver greater than 3V at over 3A. The output load can either be an active or passive load.