供应TPS2557DRBR

 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. Device Information(1)