1 Features
• Operating range: 2.5 V to 6.5 V
• Adjustable 1.2-A to 4.7-A I(LIMIT) (±4.4% at 4.7 A)
• Short-circuit shutoff (typical): 3.5 μs
• High-side MOSFET: 13 mΩ
• Maximum standby supply current: 2 μA
• Built-in soft-start
• System-level ESD capable: 8 kV / 15 kV
• UL 2367 recognition pending

2 Applications
• USB ports, hubs
• Digital TVs
• Set-top boxes
• VOIP phones

3 Description
The TPS2559 power-distribution switch is intended for
applications where a low resistance, precision current
limit switch is required or heavy capacitive loads are
encountered. The TPS2559 provides up to 5.5 A of
continuous load current with a precise current limit set
by a single resistor to ground. Output current is
maintained at a safe level by switching into a
constant-current mode when the output load exceeds
the current-limit threshold. During overload events the
output current is limited to the level set by R(ILIM). If a
persistent overload occurs, the device goes into
thermal shutoff to prevent damage to the TPS2559.
The power-switch rise and fall times are controlled to
minimize current surges during turn on or off. The
FAULT logic output asserts low during overcurrent or
overtemperature conditions.