TPS2554_16 Datasheet, PDF (1/24 Pages) Texas Instruments – Precision Adjustable Current-Limited, Power-Distribution Switches

www.ti.com
TPS2554
TPS2555
SLVSAM0 – JUNE 2011
Precision Adjustable Current-Limited, Power-Distribution Switches
Check for Samples: TPS2554, TPS2555
FEATURES
1
•2 Meets USB Current-Limiting Requirements
• Adjustable Current Limit, 500 mA to 2.5 A (typ)
• Two Independently-Settable, Current-Limit
Thresholds
• Fast Overcurrent Response - 1.5 μs (typ)
• 73-mΩ High-Side MOSFET
• 3.8-μA Maximum Standby Supply Current
• PowerPAD™ Thermal Management
• Automatic Output Discharge when Disabled
• Both High-Enable (TPS2554) and Low-Enable
(TPS2555) Versions Available
APPLICATIONS
• USB Ports/Hubs
• Digital TV
• Set-Top Boxes
• VOIP Phones
DESCRIPTION
The TPS2554/55 power-distribution switches are
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 2.5 A (typ) via an external resistor.
TPS2554/55 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 over-temperature conditions.
TPS2554/55 DRC Package and Typical Application Diagram
TPS2554/TPS2555
DRC PACKAGE
(TOP VIEW)
GND 1
IN 2
IN 3
ILIM_SEL 4
EN/EN ⁵
10 FAULT
9 OUT
PAD
8 OUT
7 ILIM0
6 ILIM1
4.5 V to 5.5 V
FAULT Signal
RFAULT
Power Switch
Enable
TPS2554/55
2/3 IN
OUT 8/9
100 nF
10 FAULT
ILIM_SEL 4
ILIM0 7
5 EN/EN
Power
PAD
ILIM1 6
GND
1
VBUS
120 mF
Current Limit
Select
2x RILIMx
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011, Texas Instruments Incorporated