The MP4317 is a configurable-frequency, synchronous, step-down switch-mode converter with integrated, internal high-side and low-side power MOSFETs (HS-FET and LS-FET, respectively). It can achieve up to 7A of highly efficient output current (IOUT), with current mode control for fast loop response.
The wide 3.3V to 45V input voltage (VIN) range accommodates a variety of step-down applications in an automotive input environment. The device’s 1.7μA shutdown current (ISD) makes it well-suited for battery-powered applications.
The MP4317 provides high power conversion efficiency across the entire load range. It achieves high efficiency under light-load conditions by scaling down the switching frequency (fSW) to reduce the switching and gate driver losses.
An open-drain power good (PG) signal indicates whether the output is within 95% to 105% of its nominal voltage. High duty cycle and low-dropout mode allow the device to withstand automotive cold-crank conditions.
Full protection features include frequency foldback to prevent inductor current (IL) runaway during start-up, over-current protection (OCP) with hiccup mode, and thermal shutdown for reliable, fault-tolerant operation. The MP4317 is available in a QFN-20 (4mmx4mm) package.
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