MPQ4431
Industrial Grade, 36V, 1A, Low Quiescent Current, Synchronous, Step-Down Converter AEC-Q100 Qualified
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Description
The MPQ4431 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 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 and is ideal for battery-powered applications due to its extremely low quiescent current.
The MPQ4431 employs advanced asynchronous mode (AAM), which helps achieve high efficiency in 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 in short-circuit condition greatly. Thermal shutdown provides reliable and fault-tolerant operation.
The MPQ4431 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
- Available with Wettable Flank
- AEC-Q100 Grade-1

Active Part Numbers:
MPQ4431GL-AEC1-P MPQ4431GL-AEC1-Z MPQ4431GLE-AEC1-P MPQ4431GLE-AEC1-Z MPQ4431GL-P MPQ4431GL-Z MPQ4431GLE-5-AEC1-P MPQ4431GLE-5-AEC1-Z MPQ4431GLE-33-AEC1-P MPQ4431GLE-33-AEC1-Z
Part numbers ending in P and Z are the same parts. P and Z only indicates reel size.
Meaning of P & Z
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MPQ4431 Resources
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TELEMATICS/E-CALLSAPPLICATIONTelematics and e-call systems help increase vehicle safety by monitoring conditions and, in the event of a crash, assisting the driver with or alerting emergency responders directly to the event. These embedded onboard tools can monitor diagnostics and offer benefits such as vehicle tracking, as well communication for roadside assistance and emergency calls. Of course, new features also bring grea...
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77GHZ RADARAPPLICATION77GHz radar is quickly growing in popularity for automotive advanced driver assistance system (ADAS) applications. Perception-sensing systems are a growing market within ADAS technologies, and will continue to expand as new cars integrate radar with cameras and even LIDAR systems. Automotive imaging radar is used as an additional way to sense objects or potential hazards around the vehicle. 77GHz ...
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VIDEO
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