TPS2557DRBR Description
TPS255x distribution switches are suitable for applications that require precise current limiting or encounter heavy capacitive loads and short circuits. These devices provide a programmable current limiting threshold between 500 mA and 5 A (typical) through external resistors. The rise and fall time of the power switch is controlled to minimize the current surge during turning and turn-off. When the output load exceeds the current limiting threshold, the TPS255x device will switch to constant current mode, thus limiting the output current to a safe level. Under the conditions of overcurrent and overheating, the fault logic output is low.
TPS2557DRBR Features
? 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
TPS2557DRBR Applications
? USB Ports and Hubs
? Digital TVs
? Set-Top Boxes
? VOIP Phones
