The EV4459DQT-00A is an evaluation board for the MP4459, a high frequency step-down switching regulator with an integrated internal high-side high voltage power MOSFET. The IC provides 1.5A output with current mode control for fast loop response and easy compensation.
High power conversion efficiency over a wide load range is achieved by scaling down the switching frequency at light load condition to reduce the switching and gate driving losses.
The frequency foldback helps prevent inductor current runaway during startup and thermal shutdown provides reliable, fault tolerant operation.
By switching at 4MHz, the MP4459 prevents EMI (Electromagnetic Interference) noise problems, such as those found in AM radio and ADSL applications.
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