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TPS2556 Datasheet Preview

TPS2556 Datasheet

Precision Adjustable Current-Limited Power-Distribution Switches

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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.




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TPS2556 Datasheet Preview

TPS2556 Datasheet

Precision Adjustable Current-Limited Power-Distribution Switches

No Preview Available !

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 Switching Characteristics .......................................... 6
7.7 Typical Characteristics .............................................. 7
8 Parameter Measurement Information ................ 10
9 Detailed Description ............................................ 11
9.1 Overview ................................................................. 11
9.2 Functional Block Diagram ....................................... 11
9.3 Feature Description................................................. 11
9.4 Device Functional Modes........................................ 12
10 Application and Implementation........................ 13
10.1 Application Information.......................................... 13
10.2 Typical Applications .............................................. 13
11 Power Supply Recommendations ..................... 18
12 Layout................................................................... 19
12.1 Layout Guidelines ................................................. 19
12.2 Layout Example .................................................... 19
12.3 Thermal Considerations ........................................ 20
13 Device and Documentation Support ................. 21
13.1 Related Links ........................................................ 21
13.2 Receiving Notification of Documentation Updates 21
13.3 Community Resources.......................................... 21
13.4 Trademarks ........................................................... 21
13.5 Electrostatic Discharge Caution ............................ 21
13.6 Glossary ................................................................ 21
14 Mechanical, Packaging, and Orderable
Information ........................................................... 21
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision A (Feburary 2012) to Revision B
Page
• Added Device Information table, Device Comparison Table, Pin Configuration and Functions section, Specifications
section, ESD Ratings table, Application and Implementation section, Power Supply Recommendations section,
Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information
section .................................................................................................................................................................................... 1
• Deleted Ordering Information table; see Package Option Addendum at the end of the data sheet ...................................... 1
• Added Thermal Information table ........................................................................................................................................... 5
• Changed RθJC(top) value in Thermal Information table From: 10.7°C/W To: 54.5°C/W ........................................................... 5
• Changed Figure 11 title From: Current Limit Threshold Vs RILM To: Switch Current vs Drain-Source Voltage Across
Switch ..................................................................................................................................................................................... 7
• Changed Figure 12 title From: Current Limit Threshold Vs RILM To: Switch Current vs Drain-Source Voltage Across
Switch ..................................................................................................................................................................................... 7
Changes from Original (November 2009) to Revision A
Page
• Changed VEN to VEN in Recommended Operating Conditions table ...................................................................................... 4
• Changed VEN to VEN in Recommended Operating Conditions table ...................................................................................... 4
2
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Copyright © 2009–2016, Texas Instruments Incorporated
Product Folder Links: TPS2556 TPS2557


Part Number TPS2556
Description Precision Adjustable Current-Limited Power-Distribution Switches
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