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MP4433 - Step-Down Converter

Description

The MP4433 is a synchronous, step-down, switching regulator with programmable frequency (350kHz to 2.5MHz) and integrated, internal, high-side and low-side power MOSFETs.

The MP4433 provides up to 3A of highly efficient output current with current mode control for fast loop response.

Features

  • include soft start, external clock synchronization, enable control, and power good indication. High-duty cycle and low dropout mode are provided for automotive coldcrank. Over-current protection (OCP) with valleycurrent detection is employed to prevent the inductor current from running away. Hiccup mode reduces the average current greatly in short-circuit condition. Thermal shutdown provides reliable and fault-tolerant operation. The MP4433 is available in a QFN-16 (3mmx4mm) package.

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Full PDF Text Transcription

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MP4433 36V, 3A, Low Quiescent Current, Synchronous, Step-Down Converter DESCRIPTION The MP4433 is a synchronous, step-down, switching regulator with programmable frequency (350kHz to 2.5MHz) and integrated, internal, high-side and low-side power MOSFETs. The MP4433 provides up to 3A of highly efficient output current with current mode control for fast loop response. The wide 3.3V to 36V input range accommodates a variety of step-down applications in automotive input environments. The MP4433 is ideal for battery-powered applications due to its extremely low quiescent current. The MP4433 employs advanced asynchronous mode (AAM) to achieve high efficiency in lightload condition by scaling down the switching frequency to reduce switching and gate driving losses.
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