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Demonstration circuit 611 is a dual, spread-spectrum, step-down charge pump DC/DC converter featuring the LTC3252EDE. It produces regulated 1.5V and 1.2V output voltages at up to 250mA of output current each, from a 2.7V to 5.5V input. The unique spread spectrum architecture of the LTC3252 provides highly efficient, low noise operation. The circuit has a low external parts count and requires only five small surface mount capacitors and four tiny surface mount resistors.