1 Features
1• Meets USB Current-Limiting Requirements
• Adjustable Current Limit, 500 mA to 5 A (Typical)
• ±6.5% Current-Limit Accuracy at 4.5 A
• Fast Overcurrent Response: 3.5-μs (Typical)
• 22-mΩ High-Side MOSFET
• Operating Voltage: 2.5 V to 6.5 V
• 2-μA Maximum Standby Supply Current
• Built-in Soft Start
• 15-kV and 8-kV System-Level ESD Capable
• UL Listed: File No. E169910 and CB IEC60950-1-
am2 ed2.0

2 Applications
• USB Ports and Hubs
• Digital TVs
• Set-Top Boxes
• VOIP Phones

3 Description
The TPS255x power-distribution switch is intended
for applications where precision current limiting is
required or heavy capacitive loads and short circuits
are encountered. These devices offer a
programmable current-limit threshold between
500 mA and 5 A (typical) through an external resistor.
The power-switch rise and fall times are controlled to
minimize current surges during turnon and turnoff.
TPS255x devices limit the output current to a safe
level by switching into a constant-current mode when
the output load exceeds the current-limit threshold.
The FAULT logic output asserts low during
overcurrent and overtemperature conditions.