1 Features
1• Up to 1.5 A Maximum Load Current
• ±6% Current-Limit Accuracy at 1.7 A (Typ)
• Meets USB Current-Limiting Requirements
• Backwards Compatible with TPS2550/51
• Adjustable Current Limit, 75 mA–1700 mA (Typ)
• Constant-Current (TPS2552D and TPS2553D)
• TPS2552D (Enable Low) and TPS2553D (Enable
High)
• Fast Overcurrent Response - 2 μs (Typ)
• 85-mΩ High-Side MOSFET (DBV Package)
• Reverse Input-Output Voltage Protection
• Operating Range: 2.7 V to 6.5 V
• Built-in Soft-Start
• 15 kV ESD Protection per IEC 61000-4-2 (With
External Capacitance)
• UL Listed – File No. E169910 and NEMKO
IEC60950-1-am1 ed2.0
• See the TI Switch Portfolio

2 Applications
• USB Ports/Hubs
• Digital TV
• Set-Top Boxes
• VOIP Phones

3 Description
The TPS2552D and TPS2553D power-distribution
switches are intended for applications where
precision current limiting is required or heavy
capacitive loads and short circuits are encountered
and provide up to 1.5 A of continuous load current.
These devices offer a programmable current-limit
threshold between 75 mA and 1.7 A (typ) via an
external resistor. Current-limit accuracy as tight as
±6% can be achieved at the higher current-limit
settings. The power-switch rise and fall times are
controlled to minimize current surges during turn
on/off.
The TPS2552D/3D devices limit the output current to
a safe level by using a constant-current mode when
the output load exceeds the current-limit threshold.
An internal reverse-voltage comparator disables the
power-switch when the output voltage is driven higher
than the input to protect devices on the input side of
the switch. The FAULT output asserts low during
overcurrent and reverse-voltage conditions.