The FSUSB20 is a USB high-side power switch manufactured by Fairchild Semiconductor (now ON Semiconductor). It is designed to protect USB ports and devices from overcurrent and short-circuit conditions. This switch provides a controlled current limit and thermal shutdown to safeguard the USB host and connected peripherals.

Applications:

• USB Ports in Desktop and Laptop Computers
• USB Hubs
• Portable Devices (e.g., Smartphones, Tablets)
• USB Dongles
• Embedded Systems with USB Interfaces

Features:

• Overcurrent Protection
• Short-Circuit Protection
• Thermal Shutdown
• Controlled Rise Time
• Reverse Blocking
• Under-Voltage Lockout (UVLO)
• Enable Input

Benefits:

• Protects USB ports and devices from damage due to overcurrent and short-circuit conditions, increasing system reliability.
• Prevents system crashes and data loss by quickly disconnecting the power supply during fault conditions.
• Simplifies USB power management with controlled rise time and enable input.
• Ensures safe operation by preventing reverse current flow from the USB device back to the host.
• Reduces power consumption with under-voltage lockout, preventing operation at low voltages.

Additional Details:

The FSUSB20 operates from a supply voltage range of 2.7V to 5.5V. It features a typical current limit of 500mA, complying with USB standards. The controlled rise time minimizes inrush current during startup. The device's reverse blocking feature prevents current from flowing back into the power supply. The under-voltage lockout function ensures that the switch operates only when the supply voltage is within the specified range. The enable input allows for external control of the power switch. The device is available in a small package, suitable for space-constrained applications. The FSUSB20 is designed to meet USB specifications and protect sensitive electronic components from electrical damage. It is commonly used in a variety of USB-powered devices to ensure safe and reliable operation.