Switching Voltage Regulators High Efficiency 3A peak,36V,Synchronous Step Down Converter with Power Good

MP9943GQ-Z – 3A, 36V Synchronous Step-Down Voltage Regulator – Monolithic Power Systems

Optimize power efficiency in space-constrained designs with the MP9943GQ-Z from Monolithic Power Systems. This high-performance synchronous buck converter delivers up to 3A continuous output current with industry-leading efficiency, making it ideal for demanding industrial and embedded applications. PCX ensures genuine Monolithic Power Systems components with rapid shipping and dedicated technical support.

Key Features

• Wide Input Range: 4V to 36V operation
• Adjustable Output: 0.8V to 28.5V with ±1.5% accuracy
• High-Efficiency Design: Integrated synchronous rectifier (up to 95% efficiency)
• Robust Protection: Power Good signal, thermal shutdown, and cycle-by-cycle current limiting
• Compact Footprint: 8-QFN package (3x3mm) for space-sensitive layouts

Technical Specifications

This step-down DC-DC switching regulator operates at a fixed 410kHz switching frequency, reducing external component size while minimizing EMI. It features a single positive adjustable output and maintains stable performance across an industrial temperature range of -40°C to +125°C junction temperature. The surface-mount 8-VDFN package (supplier device package: 8-QFN) enables automated assembly processes. A comprehensive datasheet is available for design verification.

Typical Applications

• Industrial automation and control systems
• Network routers, switches, and communication infrastructure
• 12V/24V distributed power bus architectures
• Embedded computing and IoT devices
• Battery-powered portable equipment

About Monolithic Power Systems

Monolithic Power Systems (MPS) is a global leader in power management solutions, renowned for innovative high-performance analog semiconductors. With over 25 years of industry expertise, MPS integrates advanced topologies with proprietary process technologies to deliver efficient, compact power ICs that outperform industry standards.

MPS maintains rigorous quality control certified to automotive-grade standards, ensuring exceptional reliability for mission-critical applications. Their commitment to energy-efficient designs aligns with global sustainability initiatives, making MPS regulators a preferred choice for engineers seeking optimized thermal performance and extended system lifetimes.

About Switching Voltage Regulators

Switching voltage regulators (DC-DC converters) efficiently step down, step up, or invert input voltages using pulse-width modulation (PWM) techniques. Unlike linear regulators, switching topologies minimize power dissipation through rapid switching cycles, achieving efficiencies above 90% while supporting wider voltage differentials.

Buck converters like the MP9943GQ-Z are essential for modern electronics where thermal management and battery life are critical. They enable stable power delivery to sensitive components like FPGAs, processors, and sensors in industrial, automotive, and consumer systems, replacing bulky transformer-based solutions with compact, integrated ICs.

Packaging Options

Available in Tape & Reel (TR), Cut Tape (CT), and Digi-Reel® formats for production flexibility. Contact PCX for reel quantities and kitting services.

Frequently Asked Questions

Q: What is the typical efficiency of this regulator at full load?
A: The MP9943GQ-Z achieves up to 95% efficiency at 12VIN to 5VOUT conversion, varying with operating conditions.

Q: Does this IC require external compensation components?
A: Yes, it uses external compensation for loop stability. Refer to the datasheet for component selection guidelines.

Q: Can it operate from automotive 12V/24V battery systems?
A: Absolutely. Its 4-36V input range covers automotive transients, making it suitable for 12V/24V vehicle electronics.

Q: Is the Power Good signal open-drain or push-pull?
A: The Power Good output is open-drain, requiring a pull-up resistor for proper signaling.

Q: How does synchronous rectification benefit my design?
A: Synchronous rectifiers replace Schottky diodes with MOSFETs, reducing conduction losses and boosting efficiency by 5-10%.

Q: Are evaluation boards available for prototyping?
A: PCX provides access to manufacturer evaluation tools – contact our technical support for availability.

⚠️ Product image is representational; refer to datasheet for exact specifications.

Order the MP9943GQ-Z from PCX today for guaranteed authentic components and same-day shipping!