Description
The MP4559 is a high frequency step-down switching regulator with
integrated internal highside 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. A 12µA shutdown mode supply current allows use in
battery-powered applications.
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 2MHz, the MP4559 is able to prevent EMI
(Electromagnetic Interference) noise problems, such as those found
in AM radio and ADSL applications.
The MP4559 is available in small 3mm x 3mm QFN10 and SOIC8 with
exposed pad packages.
Features
- Wide 3.8V to 55V Operating Input Range
- 250mΩ Internal Power MOSFET
- Up to 2MHz Programmable Switching Frequency
- 140μA Quiescent Current
- Ceramic Capacitor Stable
- Internal Soft-Start
- Up to 95% Efficiency
- Output Adjustable from 0.8V to 52V
- Available in QFN (3mm x 3mm) and SOIC8E with Exposed Pad Packages
Applications
- High Voltage Power Conversion
- Automotive Systems
- Industrial Power Systems
- Distributed Power Systems
- Battery Powered Systems
