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Power MOSFETs

The ST Power MOSFET portfolio offers a broad range of breakdown voltages from -100 to 1700 V, combining state-of-the-art packaging with low gate charge and low on-resistance. Our process technology ensures high-efficiency solutions through enhanced power handling with MDmesh high-voltage power MOSFETs and STripFET low-voltage power MOSFETs. ST Power MOSFETs belong to the STPOWER family.


Applications

 

 

 

 

 

 

Product types

ST offers an impressive range of Power MOSFETs for any voltage range in industrial and automotive applications, such as switch mode power supplies (SMPS), lighting, motor control, energy generation & electro mobility, chassis & safety, and body & convenience.

20V-30V
Discover our STripFET low-voltage power MOSFETs, with low gate charge and low on-resistance, combined with appropriated package solution.
>30V-200V
Discover our medium-voltage STripFET N-channel power MOSFET porfolio, available in a wide range of miniature and high-power packages.
>200V-700V
ST's latest super-junction technology optimized for resonant topologies, suitable for high power applications.
>700V-1700V
Discover our MDmesh high voltage and very high voltage power MOSFETs, with enhanced power-handling capability, resulting in high-efficiency solutions.
P-channel
Discover our STripFET P-channel MOSFETs, available in very small form factor packages and recently enlarged with new trench-gate devices.


Discover our portfolio

The wide STPOWER product portfolio, with state-of-the-art packaging and protections for high reliability and safety, helps designers find the right solutions for customized, high-efficiency applications with long lifetime.


Benefits

  • -100 to 1700 V breakdown voltage range
  • More than 30 package options for low voltage to very-high-voltage Power MOSFETs, including:
    • Breakthrough top-side cooling HU3PAK package allowing higher power density and improved thermal management
    • 4-lead TO-247 with dedicated control pin for increased switching efficiency
      • H2PAK for high-current capability
      • Highly innovative surface-mount leadless TO-LL
    • 1-mm-high surface-mount PowerFLAT family (2x2 to 8x8 mm) with excellent thermal performance thanks to large metal drain pad
    • Improved gate charge and lower on-state resistance to meet today's challenging efficiency requirements
    • Intrinsic fast body diode option for selected product lines
    • Wide portfolio of automotive-grade power MOSFETs
    • Application-oriented technologies

    Automotive MOSFETs in tiny 5x6 mm dual-side cooling package

    ST has extended its offering of AEC-Q101 MOSFETs with the introduction of two 40 V devices in the advanced PowerFLAT™ 5x6 dual-side cooling (DSC) package with wettable flanks. The STLD200N4F6AG and STLD125N4F6AG, with a maximum on-resistance of 1.5 mΩ and 3.0 mΩ respectively, ensure high efficiency and help simplify system thermal management. The 0.8 mm-high PowerFLAT 5x6 DSC retains the footprint and thermally efficient bottom-side design of the standard wettable flank package, while it exposes the top-side source electrode to further enhance heat dissipation. This allows a higher current rating that increases power density, enabling designers to build smaller ECUs without trading off functionality, performance, or reliability.

    Power MOSFET Basics

    mosfet circuit
    MOSFET circuit symbol

    MOSFET stands for Metal Oxide Semiconductor Field Effect Transistor. It's a voltage controlled device with 3 terminals:

    • Gate (electrically insulated from the semiconductor)
    • Drain
    • Source

    When a voltage applied between the Gate and the Source reaches a certain threshold (VGS(th) or threshold G-S voltage), the device is able to support current conduction between the Drain and the Source (ID or drain current).

    mosfet structure
    MOSFET simplified structure

    When a voltage applied between the Gate and the Source is below VGS(th), the device will withstand a voltage up to BVDSS (or breakdown voltage).

    MOSFETs can be used as a signal amplifier (linear operation) or as a switch in power applications.

    MOSFET parameters

    Like many other types of semiconductor power switches, the main parameters of a MOSFET, usually available in most datasheets, are:

    • RDS(on) (on-state resistance): electrical resistance when the device is set in on state. The lower is RDS(on), the lower is the conduction loss due to power dissipation when the current is flowing.
    • BVDSS (breakdown voltage): maximum drain-to-source voltage that the device is able to sustain when in off state.
    • QG (total gate charge): amount of electric charge required to the gate driver to turn on/off the device itself. QG impacts directly the efficiency (the lower, the better).

    The product of RDS(on) and QG is known as the MOSFET Figure of Merit (FOM).

    Other important parameters are intrinsic capacitances that can affect the switching times and voltage spikes, and body drain diode when device is used as power diode, like in synchronous free-wheeling operation mode.

    mosfet parameters
    Example of MOSFET datasheet parameters

    Learn more about how to read MOSFET datasheet parameters thanks to our series of videos dedicated to "Power MOSFET datasheet parameters".

    Main types of power MOSFETs

    MOSFETs can be of different types, including:

    N-channel enhancement-mode MOSFETs are the most popular type used in power switching circuits because of their low RDS(on) (on-state resistance) compared to P-channel MOSFETs.

    mosfet main types
    Overview of the main types of MOSFETs

    Power MOSFET Applications

    Power MOSFETs play an important role in all applications handling Power.

    The main applications of high voltage MOSFETs include:

    • Switch Mode Power Supplies (SMPS)
    • Residential, commercial, architectural and street lighting
    • DC-DC converters
    • Motor control
    • Automotive applications

    ST's high voltage MOSFET portfolio offers a broad range of breakdown voltages up to 1700 V, with low gate charge and low on-resistance, combined with state-of-the-art packaging. ST's MDmesh™ high-voltage MOSFETs technology has enhanced power-handling capability, resulting in high-efficiency solutions.

    The main applications of low voltage MOSFETs include:

    • Switch, buck and synchronous rectification
    • Uninterruptible Power Supplies (UPS)
    • Small motor control
    • Switch Mode Power Supplies (SMPS)
    • Power-Over-Ethernet (PoE)
    • Solar inverters
    • Automotive applications

    ST's low voltage MOSFET portfolio offers a broad range of breakdown voltages from -100 V to 120 V, with low gate charge and low on-resistance, combined with state-of-the art packaging.

    eDesignSuite

    eDesignSuite is a comprehensive set of easy-to-use design-aid utilities ready to help you streamline the system development process with a wide range of ST products.

    Power Management Design Center

    Thermal-electrical Simulators for Components

    Signal Conditioning Design Tool

    NFC/RFID Calculators

    Choose design tool:

    Power Supply Design Tool

    SMPS design, by topology, by type and by product
    PFC design with analog and digitial control
    Supports various PCB configurations
    Choose type:
    DC/DC
    AC/DC
    Solar Battery Charger

    LED Lighting Design Tool

    Handles AC-DC and DC-DC design in common topologies
    Displays interactive and annotated schematic
    Provides current/voltage graphs, Bode plots, efficiency curves and power-loss data
    Choose type:
    DC/DC
    AC/DC

    Digital Power Workbench

    Provides a step-by-step optimized design of power section and control loop
    Generates the STM32Cube embedded software package for custom applications and allows firmware project generation, compatible with multiple STM32 IDEs

    Power Tree Designer

    Specify input/output power for each node in the tree
    Check for consistency
    Design each individual node
    Choose design tool:

    AC Switches Simulator

    Select ratings and application waveforms
    Get junction temperature and blocking voltage graphs
    Search and sort suitable devices

    Rectifier Diodes Simulator

    Select ratings and application waveforms
    Estimate power losses
    Search and sort suitable devices

    STPOWER Studio

    Supports long mission profiles
    Provides power loss and temperature graphs
    Helps define heatsink thermal properties

    Twister Sim

    Help select the right ViPOWER Automotive power device
    Supports load-compatibility, wiring harness optimization, fault condition impact and diagnostic analysis
    Supports various PCB configurations

    TVS Simulator

    Specify system ratings and surge waveform
    Search and sort suitable devices

    Estimate

    Build simple schematics and firmware inputs in minutes
    Quickly generate reliable estimates of battery life, system power consumption and bill of materials costs
    Choose design tool:

    Active Filters

    Handles multi-stage-designs and common topologies
    Returns circuit component values
    Provides gain, phase and group delay graphs
    Low Pass, High Pass and Band Pass

    Comparators

    Handles most common configurations
    Returns circuit components values
    Provides I/O signal waveforms
    Inverting, Non Inverting, Window

    Low side Current Sensing

    Returns circuit component values
    Provides current error graphs

    High side Current Sensing

    Provides current error graphs.
    Help to select the right High side current sensing and shunt devices.
    Choose design tool:

    NFC Inductance

    Input geometry and substrate properties
    Get antenna impedance

    UHF Link Budget

    Enter forward and reverse link characteristics
    The tool returns link budget estimate

    NFC Tuning Circuit

    Enter antenna parameter and matching target
    Select the topology of the matching network
    The tool returns component values for the desired design targets