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TPS2556, TPS2557
SLVS931B – NOVEMBER 2009 – REVISED DECEMBER 2016
TPS255x Precision Adjustable Current-Limited Power-Distribution Switches
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)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS2556, TPS2557 VSON (8)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
Typical Application as USB Power Switch
2.5V – 6.5V
R FAULT 100 kΩ
0.1 uF IN
IN
Fault Signal
FAULT
OUT OUT
R ILIM ILIM
Control Signal
EN
GND
VOUT CLOAD
Power Pad
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA.
TPS2556, TPS2557
SLVS931B – NOVEMBER 2009 – REVISED DECEMBER 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 Device Comparison Table..................................... 3 6 Pin Configuration and Functions ......................... 3 7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4 7.2 ESD Ratings.............................................................. 4 7.3 Recommended Operating Conditions....................... 4 7.4 Thermal Information .................................................. 5 7.5 Electrical Characteristics........................................... 5 7.6 Sw.