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36V, 1A, Low Quiescent Current, Synchronous, Step-Down Converter AEC-Q100 Qualified
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The MP4431 is a frequency-programmable (350kHz to 2.5MHz), synchronous, step-down switching regulator with integrated, internal, high-side and low-side power MOSFETs. It provides up to 1A 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 environment and is ideal for battery-powered applications due to its extremely low quiescent current.
The MP4431 employs advanced asynchronous mode, which helps achieve high efficiency at light-load condition by scaling down the switching frequency to reduce switching and gate driving losses.
Standard features include soft start (SS), external clock synchronization, enable (EN) control, and a power good (PG) indicator. High-duty cycle and low dropout mode are provided for automotive cold-crank condition.
Over-current protection (OCP) with valley-current 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 MP4431 is available in a QFN-16 (3mmx4mm) package.
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Features & Benefits
- Wide 3.3V to 36V Operating Input Range
- 1A Continuous Output Current
- 1μA Low Shutdown Mode Current
- 10μA Sleep Mode Quiescent Current
- Internal 90mΩ High-Side and 80mΩ Low-Side MOSFETs
- 350kHz to 2.5MHz Programmable Switching Frequency
- Fixed Output Options: 3.3V, 3.8V, 5V
- Synchronize to External Clock
- Selectable In-Phase or 180° Out-of-Phase
- Power Good (PG) Indicator
- Programmable Soft-Start (SS) Time
- 80ns Minimum On Time
- Selectable Forced CCM or AAM
- Low Dropout Mode
- Over-Current Protection (OCP) with Valley-Current Detection and Hiccup
- Available in a QFN-16 (3mmx4mm) Package
EV4431-L-00A Evaluation Kit 36V, 1A, Low Quiescent Current Synchronous Step-Down ConvertorEvaluation Board
The EV4431-L-00A is an evaluation board for the MP/MPQ4431GL.
MP/MPQ4431GL is a frequency programmable (350kHz to 2.5MHz), synchronous, step-down, switching regulator with integrated internal high-side and low-side power MOSFETs. It provides up to 1A highly efficient output current with current mode control for fast loop response.
The MP/MPQ4431GL employs AAM (Advanced Asynchronous Modulation) mode which helps to achieve high efficiency at light load condition by scaling down the switching frequency to reduce the switching and gate driving losses.
The EV4431-L-00A is a fully assembled and tested evaluation board, it generates +3.3V output voltage at load current up to 1A from a 3.3V to 36V input range.