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
  • Package Type TO-220, D2PAK, SO-8
  • Current Rating 10A to 100A
  • Voltage Rating 20V to 100V
  • Gate Charge (Qg) 10nC to 100nC
  • Switching Frequency 100kHz to 1MHz
  • On-Resistance (Rds(on)) 1mΩ to 10mΩ
Standards
ISO 16750, DIN EN 60068

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Power MOSFETs (High-side & Low-side).

Power MOSFET high-side MOSFET low-side MOSFET voltage regulator module VRM switching transistor power electronics synchronous buck converter Power MOSFETs (High-side & Low-side) Power MOSFETs (High-side & Low-side) in Electrical Equipment Manufacturing

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

Interchangeable Parts

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

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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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.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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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