INDUSTRY COMPONENT

Power MOSFETs (High-side & Low-side)

Power MOSFETs for high-side and low-side switching in voltage regulator modules, enabling efficient power conversion and control.

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Component Specifications

Definition
Power Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs) configured for high-side (connected to positive supply) and low-side (connected to ground) switching in Voltage Regulator Modules (VRMs). These semiconductor devices control power flow by switching on/off based on gate voltage, managing current between input and output stages to regulate voltage with minimal loss. High-side MOSFETs handle switching from the power source, while low-side MOSFETs manage ground-side switching, often used in synchronous buck converter topologies for improved efficiency.
Working Principle
Operates by applying a voltage to the gate terminal, creating an electric field that controls current flow between the drain and source. In VRMs, high-side MOSFETs switch the input voltage to an inductor, storing energy, while low-side MOSFETs provide a path for inductor current during off-cycles, regulating output voltage through pulse-width modulation (PWM). This switching action minimizes power dissipation compared to linear regulators.
Materials
Silicon (Si) or Silicon Carbide (SiC) semiconductor wafers, with aluminum or copper metallization for terminals, encapsulated in epoxy or ceramic packages (e.g., TO-220, D2PAK) for thermal management.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Package TypeTO-220, D2PAK, SO-8
Current Rating10A to 100A
Voltage Rating20V to 100V
Gate Charge (Qg)10nC to 100nC
Switching Frequency100kHz to 1MHz
On Resistance (Rds(on))1mΩ to 10mΩ

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
ISO 16750, DIN EN 60068

Parent Products

This component is used in the following industrial products

Voltage Regulator Module

A power management component that regulates and stabilizes voltage levels for electronic circuits.

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Power Delivery Circuitry

Electronic circuitry within a GPU responsible for regulating and delivering stable power to various components.

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Voltage Regulator Module (VRM)

A power regulation component that converts and stabilizes input voltage to provide clean, precise power to processors and other sensitive electronics on an interface board.

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Engineering Analysis

Risks & Mitigation
  • Thermal runaway due to excessive current
  • Gate oxide damage from overvoltage
  • Electromagnetic interference (EMI) from switching noise
FMEA Triads
Trigger: Overheating from high current or poor heatsinking
Failure: Thermal shutdown or permanent damage
Mitigation: Implement thermal monitoring, use adequate heatsinks, and ensure proper airflow in the design.
Trigger: Voltage spikes exceeding rated limits
Failure: Gate breakdown or avalanche failure
Mitigation: Add snubber circuits, use MOSFETs with higher voltage ratings, and incorporate protection diodes.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
±5% for voltage regulation under specified load conditions
Test Method
Dynamic load testing per ISO 16750, thermal cycling, and switching characteristic analysis using oscilloscopes and power analyzers.

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Power MOSFETs (High-side & Low-side)

Manufacturer profiles associated with Power MOSFETs (High-side & Low-side).

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the difference between high-side and low-side MOSFETs in a VRM?

High-side MOSFETs switch the input voltage to the inductor, controlling power delivery, while low-side MOSFETs provide a current path to ground during off-cycles, improving efficiency by reducing conduction losses.

Why are Power MOSFETs preferred in VRMs over other transistors?

They offer fast switching speeds, low on-resistance, and high efficiency, minimizing heat generation and power loss in high-frequency applications like voltage regulation.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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