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The ADP2125 evaluation board is a complete 6 MHz (maximum), low quiescent current, synchronous buck dc-to-dc converter capable of producing up to 500 mA of output current at a fixed 1.26 V output voltage. The converter operates with an input voltage in the 2.1 V to 5.5 V range. The device uses a voltage regulating pulse-width modulation (PWM) that maintains a constant frequency with excellent stability and transient response. The evaluation board demonstrates the operation and performance of the ADP2125 as well as its compatibility with tiny ceramic components for a small area solution.