1 Features

• 4.5-V to 18-V Protection
• Integrated 28-mΩ Pass MOSFET
• Absolute Maximum Voltage of 20 V
• 1-A to 5-A Adjustable I_LIMIT
• ±8% I_LIMIT Accuracy at 3.7A
• Reverse Current Blocking Support
• Programmable OUT Slew Rate, UVLO
• Built-in Thermal Shutdown
• UL 2367 Recognized – File No. E339631*
  • *RILIM ≤ 130 kΩ (5 A maximum)
• Safe During Single Point Failure Test (UL60950)
• Small Foot Print – 10L (3 mm x 3 mm) VSON

2 Applications

• HDD and SSD Drives
• Set Top Boxes
• Servers / AUX Supplies
• Fan Control
• PCI/PCIe Cards
• Adapter Powered Devices

3 Description

The TPS25927x family of eFuses is a highly integrated circuit protection and power management solution in a tiny package. The devices use few external components and provide multiple protection modes. They are a robust defense against overloads, shorts circuits, excessive inrush current, and reverse current.

Current limit level can be set with a single external resistor. Applications with particular voltage ramp requirements can set dV/dT pin with a single capacitor to ensure proper output ramp rates.

Many systems, such as SSDs, must not allow holdup capacitance energy to dump back through the FET body diode onto a drooping or shorted input bus. The BFET pin is for such systems. An external NFET can be connected “Back to Back (B2B)” with the TPS25927x output and the gate driven by BFET to prevent current flow from load to source.

1. For all available packages, see the orderable addendum at the end of the data sheet.

Application Schematic

Transient: Output Short Circuit