MP4559DQ-LF-P

MP4559 is a high frequency step-down switching regulator with integrated internal high side high voltage power MOSFET. It provides 1.5A output with current mode control for fast loop response and easy compensation. The wide 3.8V to 55V input range accommodates a variety of step-down applications, including those in automotive input environment. 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 start-up and thermal shutdown provides reliable, fault tolerant operation. By switching at 2MHz, the MP4559 is able to prevent EMI noise problems, such as those found in AM radio and ADSL applications. Typical applications include high voltage power conversion, automotive systems, industrial power systems, distributed power systems and battery powered systems.

• 250mohm internal power MOSFET
• 140µA quiescent current
• Ceramic capacitor stable
• Internal soft-start
• Up to 95% efficiency
• Output adjustable from 0.8V to 52V
• 12µA shutdown mode supply current allows use in battery-powered applications
• Available in small 3mm x 3mm QFN10 package