Power Switch ICs – Power Distribution OVER CURRENT PROTECTION

NCP380HMUAJAATBG – Adjustable Current Limit, 55mOhm Rds On Power Switch – onsemi

Optimize your power management design with the NCP380HMUAJAATBG from onsemi, a high-efficiency power distribution switch and load driver IC. This surface-mount component delivers precise current control and robust protection for sensitive electronics, featuring ultra-low 55mOhm resistance to minimize voltage drops and thermal losses. PCX ensures genuine onsemi components with same-day shipping and dedicated technical support.

Key Features

• Adjustable Current Limit: Customize max output current for application-specific protection
• Ultra-Low Rds On: 55mOhm typical P-Channel resistance for high efficiency
• Wide Load Voltage Range: 2.5V to 5.5V compatibility
• Advanced Protection: Adjustable current limiting + UVLO (Under-Voltage Lockout)
• Status Monitoring: Integrated fault flag output
• Industrial Temperature Range: -40°C to +85°C operation

Technical Specifications

This general-purpose high-side switch features a 1:1 input/output ratio with non-inverting On/Off control. The P-Channel MOSFET output supports single-channel power distribution in compact 6-UDFN (2×2) exposed pad packaging. Critical features include slew rate control for inrush current management, enable input high logic, and no separate Vcc/Vdd supply requirement. Base part number: NCP380. Download full datasheet.

Typical Applications

• USB power management hubs
• Portable device load switching
• Industrial control system power gates
• Battery-powered equipment protection circuits
• IoT sensor module power distribution

About onsemi

onsemi (Nasdaq: ON) is a global leader in intelligent power and sensing technologies, driving innovations in automotive, industrial, and cloud-power markets. With over 75,000 products in portfolio, they hold ISO/TS 16949 and ISO 14001 certifications, reflecting commitment to automotive-grade reliability and sustainable manufacturing.

The company’s power management ICs are renowned for energy efficiency and robustness, developed through extensive R&D investments. onsemi components undergo rigorous qualification testing, making them preferred solutions for mission-critical applications where operational integrity is paramount.

About Power Distribution Switches

Power distribution switches are essential integrated circuits that manage and protect downstream electronics by controlling current flow. They function as intelligent gates between power sources and subsystems, preventing damage from short circuits, inrush currents, and voltage irregularities. Modern designs incorporate advanced features like adjustable current thresholds and fault reporting.

These ICs are fundamental in space-constrained applications where board reliability and thermal management are critical. By replacing discrete MOSFET solutions with integrated load drivers, engineers reduce component count while gaining precision control over power sequencing, surge protection, and system diagnostics across consumer, industrial, and automotive designs.

Packaging Options

Available in industry-standard formats: Tape & Reel (TR), Cut Tape (CT), and Digi-Reel® compatible packaging. Specify your preferred option when ordering.

Frequently Asked Questions

Q: What is the maximum adjustable current limit?
A: While dependent on external components, the NCP380 supports current limiting up to several amps – refer to datasheet Section 5.3 for calculation guidelines.

Q: Does this IC require an external Vcc supply?
A: No, the NCP380 operates without separate Vcc/Vdd input, simplifying board design.

Q: How does the status flag function work?
A: The open-drain fault flag pulls low during overcurrent, UVLO, or thermal shutdown conditions, enabling system diagnostics.

Q: Is this suitable for automotive applications?
A: While industrial-grade (-40°C to +85°C), confirm AEC-Q100 compliance for automotive use in specific onsemi variants.

Q: What’s the advantage of slew rate control?
A: Controlled turn-on minimizes inrush current during capacitive load charging, preventing voltage droops and reducing EMI.

Q: Can I parallel multiple devices for higher current?
A: Yes, parallel configuration is possible with proper current-sharing design considerations.

⚠️ Note: Product images are representational. Verify specifications using the provided datasheet.

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