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Demonstration circuit DC1198B-A features the LTM4605EV, the high efficiency, high density switch mode buck-boost μModule® regulator. The LTM4605EV can regulate its output voltage from an input voltage above, below, or equal to the output. The input voltage range of DC1198B-A is from 4.5V to 20V with a preset output voltage of 12V. The rated load current is 5A, although derating is necessary for certain VIN, VOUT, and thermal conditions. The switching frequency may be synchronized to an external clock from 200kHz to 400kHz. This PLL can be used not only to reduce undesirable frequency harmonics but also to parallel LTM4605 to provide high output current.