STSJ25NF3LL

Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width) Exposed Pad
Series:	STripFET™ II
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
FET Type:	N-Channel
Technology:	MOSFET (Metal Oxide)
Drain to Source Voltage (Vdss):	30V
Current - Continuous Drain (Id) @ 25°C:	25A (Tc)
Drive Voltage (Max Rds On, Min Rds On):	4.5V, 10V
Rds On (Max) @ Id, Vgs:	10.5 mOhm @ 12.5A, 10V
Vgs(th) (Max) @ Id:	1V @ 250µA
Gate Charge (Qg) (Max) @ Vgs:	33nC @ 4.5V
Vgs (Max):	±16V
Input Capacitance (Ciss) (Max) @ Vds:	1650pF @ 25V
FET Feature:	--
Power Dissipation (Max):	70W (Tc)
Operating Temperature:	150°C (TJ)
Mounting Type:	Surface Mount

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Introduction

The STSJ25NF3LL is a single field effect transistor (FET), based on a metal-oxide-semiconductor (MOSFET) architecture. It is manufactured by STMicroelectronics and is part of their Power MOSFET family. This transistor has an operating voltage of 25V and is capable of carrying a maximum drain current of 2A. It is a low-on-resistance device making it well suited for a range of applications. This article provides an overview of the common applications of the STSJ25NF3LL and the principles of its operation.

Applications

The STSJ25NF3LL is a versatile device suitable for many types of applications. It is frequently used in power supply systems, where it is employed as a power switch, typically coupled with one or more transistors and resistors, depending on the design. This type of switch is ideal for controlling the flow of power in order to control the output of a device. In addition, the STSJ25NF3LL is well-suited for use in dc-dc converters, where it is employed as a switch connecting the input and output stages of the converter. The converter is used in a variety of devices ranging from mobile phones and laptops to power supplies for radio-controlled vehicles and children\'s toys.Another application for the STSJ25NF3LL is in automotive systems, where it is often used as a switch in the control circuits of fuel pumps and injectors. The low on-resistance of the transistor makes it particularly suited to this application where power efficiency is a major factor. Additionally, the STSJ25NF3LL is commonly used in motor control circuits, where it is frequently employed as a switch to control the current flowing to a motor.

Working Principle

The STSJ25NF3LL is a type of MOSFET, which is based on the principle of the metal-oxide-semiconductor field effect (MOSFET). In its simplest form, this transistor is composed of an insulated metallic gate placed over an N-type silicon (or other semiconductor) substrate. The gate voltage is then used to control the current flowing from drain to source. When the gate voltage is higher than the source voltage, electrons flow from the drain to the source and the device is in the “on” state. Conversely, when the gate voltage is lower than the source voltage, the electrons are repelled and the device is in the “off” state. The STSJ25NF3LL, in particular, is a low-on-resistance device, meaning that it offers low resistance when in the “on” state and, therefore, allowing more current to flow through the transistor than other types of FETs. This makes the STSJ25NF3LL particularly suitable for applications where power efficiency is paramount.

Conclusion

The STSJ25NF3LL is a popular single-gate FET based on a MOSFET architecture and manufactured by STMicroelectronics. It has an operating voltage of 25V and is capable of carrying a maximum drain current of 2A. This transistor is versatile, and it is commonly used in power supply systems, dc-dc converters, automotive systems and motor control circuits. Its low-on-resistance makes it particularly suited for applications where power efficiency is critical. This article provided an overview of the common applications of the STSJ25NF3LL and the principles of its operation.

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