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TPS2557DRBR-TPS2557DRBT
Precision Adjustable Current-Limited Power-Distribution Switches
OUT
OUT
GND
FAULT ILIM
RILIM
RFAULT
100 kΩ
Control Signal
2.5V– 6.5V VOUT0.1 uF
CLOAD
Fault Signal
Power Pad
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TPS2556, TPS2557SLVS931B–NOVEMBER 2009–REVISED DECEMBER 2016
TPS255x Precision Adjustable Current-Limited Power-Distribution Switches Features Meets USB Current-Limiting Requirements Adjustable Current Limit, 500 mAto5A (Typical) ±6.5% Current-Limit Accuracyat 4.5A Fast Overcurrent Response: 3.5-µs (Typical) 22-mΩ High-Side MOSFET Operating Voltage: 2.5Vto 6.5V 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
Applications USB Ports and Hubs Digital TVs Set-Top Boxes VOIP Phones
DescriptionThe TPS255x power-distribution switchis intended
for applications where precision current limitingis
requiredor heavy capacitive loads and short circuits
are encountered. These devices offer a
programmable current-limit threshold
500 mA and5A (typical) throughan external
The power-switch rise and fall times are controlled
minimize current surges during turnon and turnoff.
TPS255x devices limit the output currenttoa safe
levelby switching intoa 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)(1) Forall available packages, see the orderable addendum
the endofthe data sheet.
Typical Applicationas USB Power Switch
