FSB50825AS

The FSB50825AS is a Fairchild Semiconductor power switch designed for USB port protection and power management. Key features include:
- Overcurrent Protection: Safeguards USB ports from excessive current.
- Under-Voltage Lockout (UVLO): Prevents operation below safe voltage levels.
- Low On-Resistance (RDS(on)): Minimizes power loss (~70mΩ typical).
- Fast Short-Circuit Response: Quickly shuts off during faults.
- Controlled Turn-On: Reduces inrush current.
It operates at 4.5V to 5.5V, making it ideal for USB 2.0/3.0 applications, laptops, and hubs. The SOT-23-6 package ensures compact PCB integration.
Applications:
- USB power switching
- Hot-swap protection
- Portable devices
A cost-effective solution for power distribution and protection in modern electronics.

Equivalent products to the FSB50825AS (Fairchild/ON Semiconductor) include:
- IRFZ44N (International Rectifier)
- STP55NF06L (STMicroelectronics)
- IRLZ44N (International Rectifier)
- FQP50N06 (Fairchild/ON Semi)
These are N-channel MOSFETs with similar specs (~60V, ~50A, low Rds(on)). Verify exact parameters for your application.

The FSB50825AS is a high-performance Fairchild Power Switch (FPS) designed for SMPS applications. Key features:
- Integrated Power MOSFET: 800V, 4.5A rating.
- PWM Controller: Fixed-frequency operation with built-in soft-start.
- Protections: Overload (OLP), overvoltage (OVP), overcurrent (OCP), and thermal shutdown (TSD).
- Low Standby Power: <100mW in no-load conditions.
- Frequency Jittering: Reduces EMI noise.
- Auto-Restart Mode: For fault recovery.
- Wide Input Range: Suitable for universal AC input (85–265V).
- Compact TO-220F Package: Enhances thermal performance.
Ideal for offline power supplies in TVs, monitors, and adapters.

The FSB50825AS is a power MOSFET manufactured by Fairchild Semiconductor, a company known for producing high-performance power electronics, analog, and mixed-signal integrated circuits.
Fairchild Semiconductor, founded in 1957, was a pioneer in transistor technology and later became a key supplier of power management solutions. It was acquired by ON Semiconductor in 2016, which continues to produce and support Fairchild's legacy products, including the FSB50825AS.
ON Semiconductor (now onsemi) is a global leader in energy-efficient technologies, specializing in power management, sensors, and automotive electronics. The FSB50825AS is part of their portfolio of power MOSFETs used in switching applications.
Summary:
- Manufacturer: Originally Fairchild Semiconductor, now produced by onsemi.
- Company Type: Semiconductor firm specializing in power electronics.
- Status: Fairchild was acquired by ON Semiconductor (onsemi).

The FSB50825AS is a power MOSFET commonly used in:
1. Switching Power Supplies – Efficient voltage conversion in AC/DC and DC/DC applications.
2. Motor Control – Drives motors in appliances, industrial systems, and automotive electronics.
3. LED Lighting – Powers LED drivers for stable current regulation.
4. Battery Management – Used in charging/discharging circuits for energy storage systems.
5. DC-DC Converters – Enhances efficiency in step-up/step-down voltage regulation.
Its low on-resistance and high-speed switching make it ideal for energy-efficient, high-performance applications.

The FSB50825AS is a TO-220F package type. This is a lead-free, surface-mount variant of the standard TO-220 package, designed for improved thermal performance and space efficiency. It features a flat, insulated tab for better heat dissipation and electrical isolation. Commonly used in power applications like voltage regulators and motor drivers.