Summary of MOSFET Features by Structure

Features and main applications based on the structure of various MOSFETs are shown in Table 3-2.

  • Withstand voltage: The optimum structure is selected for the target withstand voltage.
  • Low On-Resistance: U-MOS for products with 250 V or less, SJ-MOS (or DTMOS) are advantageous for products with more than that.
  • High current: The same tendency as for low ON resistance.
  • High Speed: U-MOS is disadvantageous for high-speed switching because of large gate capacity (Ciss).

Depending on the product, it is also commercialized for high-speed switching designed for small "Ron × Ciss” by taking advantage of the low ON resistance characteristic.

Table 3-2. Advantages and applications of MOSFETs by structure
Names at Toshiba U-MOS π-MOS DTMOS
General name Trench gate MOS


Planer gate MOS

Withstand voltage Better up to 250 V Excellent up to 900 V Excellent 600 V or higher
Low ON voltage Excellent Fair Excellent
High current Excellent Fair Excellent
High speed Good/Excellent
Good Excellent
Application Field Battery applications Small-to medium-capacity converters Medium-to large-capacity converters
Equipment PCM,NBPC,DC/DC converters,motor equipment for automobiles Chargers,adaptors small-to medium-size TVs, LED lighting Base station & server power supplies, medium-to large-size TVs, power conditioners

Chapter III : Transistors

Types of Transistors
Bipolar Transistors (BJTs)
Bias Resistor Built-in Transistors (BRTs)
Junction Field-Effect Transistors (JFETs)
Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs)
Differences between BJT and MOSFET
Structure and Operation of MOSFET
MOSFET Performance Improvement: Decision Factors of RDS(ON)
MOSFET Performance Improvement: Approach to Low RDS(ON)
MOSFET Performance Improvement: Super-Junction MOSFETs (SJ-MOS)
Performance of MOSFETs: Drain Current and Power Dissipation
Performance of MOSFETs: Avalanche Capability
Performance of MOSFETs: Characteristic of Capacitance
Performance of MOSFETs: Safe Operating Area(or Area of Safe Operation)
Insulated-Gate Bipolar Transistors (IGBTs)
Operation of Insulated-Gate Bipolar Transistors (IGBTs)
Performance Improvement of IGBTs: Evolution of Vertical Design
What are RC-IGBTs and IEGTs?
Application of IGBTs
Comparison of Forward Characteristics of IGBTs and MOSFETs
Comparison of Transistors by Structure
Datasheets of MOSFET: Maximum Ratings
Datasheets of MOSFET: Electrical Characteristics
Datasheets of MOSFET: Capacitance and Switching Characteristics
Datasheets of MOSFET: Body Diode

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