Infineon IPB80N03S4L-02 OptiMOS Power MOSFET: Datasheet, Pinout, and Application Circuit Guide
The Infineon IPB80N03S4L-02 is a benchmark N-channel power MOSFET from Infineon's esteemed OptiMOS™ family, engineered to deliver exceptional efficiency and robustness in power conversion applications. This article provides a comprehensive overview of its key specifications, pinout configuration, and a practical application circuit to guide your design process.
Datasheet Overview and Key Specifications
The IPB80N03SL-02 is designed using advanced trench technology, which is the cornerstone of its high-performance characteristics. It is housed in a TO-263 (D2PAK) package, offering an excellent balance between power handling capability and board space. Here are the critical parameters that define this component:
Drain-Source Voltage (VDS): 30 V. This makes it ideally suited for low-voltage applications such as secondary synchronous rectification in switch-mode power supplies (SMPS) and motor control circuits in consumer electronics.
Continuous Drain Current (ID): 80 A at a case temperature (Tc) of 25°C. This high current rating underscores its capability to handle significant power levels.
On-Resistance (RDS(on)): A remarkably low 1.8 mΩ (max) at VGS = 10 V. This is arguably its most crucial feature, as it directly translates to reduced conduction losses, higher efficiency, and lower heat generation.
Gate Threshold Voltage (VGS(th)): Typically 2.3 V, with a maximum gate-source voltage (VGS) of ±20 V.
Total Gate Charge (Qg): A low typical value of 65 nC. This low charge enables very fast switching speeds, which minimizes switching losses and allows for higher frequency operation in converters.
Pinout Configuration
The IPB80N03S4L-02 comes in a standard TO-263 (D2PAK) package with three pins. The pinout is standard for this package type:
1. Pin 1 (Gate): This is the control pin. The voltage applied between the Gate and Source pins determines the conduction state of the MOSFET.
2. Pin 2 (Drain): This is the input pin connected to the load or power source. The large tab on the component is also electrically connected to the Drain pin and must be considered during PCB layout for heatsinking.
3. Pin 3 (Source): This is the output and reference pin, typically connected to ground.
Application Circuit Guide: A Synchronous Buck Converter
One of the most common applications for the IPB80N03S4L-02 is as the low-side (synchronous) MOSFET in a DC-DC buck converter. This topology is ubiquitous in computing, telecom, and automotive power systems to step down a higher voltage to a lower level with high efficiency.
In a synchronous buck converter:
The high-side (control) MOSFET switches the input voltage to the output inductor.
The IPB80N03S4L-02, acting as the low-side MOSFET, provides a path for the inductor current when the high-side switch is off, replacing the need for a standard diode.
Why is it perfect for this role?
Its extremely low RDS(on) ensures minimal voltage drop when conducting, drastically reducing the power loss that would occur with a diode. This significantly boosts the overall efficiency of the power supply, especially at high output currents. Furthermore, its fast switching capability (thanks to low Qg) ensures clean transitions between states, further optimizing performance.
Crucial Design Considerations:
1. Gate Driving: Use a dedicated MOSFET gate driver IC. The driver must be capable of sourcing and sinking large peak currents to quickly charge and discharge the MOSFET's gate, ensuring it switches rapidly and stays out of the high-loss linear region.
2. Heatsinking: Although efficient, the MOSFET will still dissipate heat, especially under high load currents. The Drain tab must be soldered to a large copper area (PCB paddle) on the board to act as an effective heatsink.
3. Decoupling: Place ceramic decoupling capacitors very close to the Drain and Source pins to suppress voltage spikes and provide a local high-frequency current loop.
ICGOOODFIND
The Infineon IPB80N03S4L-02 OptiMOS™ transistor stands out as a superior choice for designers seeking to maximize efficiency and power density in low-voltage, high-current power systems. Its industry-leading combination of ultra-low on-resistance, high current capability, and fast switching performance makes it an indispensable component in modern, high-efficiency switch-mode power supplies and motor drives.
Keywords:
1. OptiMOS
2. RDS(on)
3. Synchronous Rectification
4. TO-263
5. Power Efficiency
