TPS2505
www.ti.com
SPAS093B –DECEMBER 2009–REVISED JUNE 2010
INTEGRATED DUAL USB SWITCHES, BOOST CONVERTER AND LDO
Check for Samples: TPS2505
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FEATURES
Typical Application
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Integrated Synchronous Boost Converter, LDO
and Dual USB Current-Limited Switches
2.2µH
1.8-V to 5.25-V Input Voltage
(2.2-V Minimum Start-Up Voltage)
Power
Supply
1.8V – 5.25V
SW
IN
RESET
3.3V Power
10µF
EN
LDOOUT
Adjustable Independent USB Current Limit
1µF
EN_LDO
LDOIN
–
100 mA to 1100 mA
5V USB Power
120µF
HUB
CONTROLLER
USB1
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Auxiliary 5.1-V Output
5V Output
RFAULT1
AUX
22µF
3.3-V Linear Regulator Output
Inrush Current < 100 mA
TPS2505
RFAULT2
5V USB Power
120µF
USB2
ILIM1
ILIM2
FAULT1
FAULT2
ENUSB1
ENUSB2
Minimal External Components Required
Deglitched Independent Fault Reporting
Small 5-mm x 5-mm QFN-20 Package
Industrial Temperature Range
RLIM1
RLIM2
GND
PAD
PGND
APPLICATIONS
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Portable Applications Using Single Li+ Cell
Bus Powered USB Hosts
USB Hosts Without Native 5-V Supplies
Computer Peripherals
DESCRIPTION
The TPS2505 provides an integrated solution to meet USB 5-V power requirements from a 1.8-V to 5.25-V input
supply. The features include a 5.1-V, 1100-mA boost converter, a 200-mA, 3.3-V LDO linear regulator and dual
USB 2.0 compliant power outputs with independent output switch enable, current limit, and over-current fault
reporting.
The 1.8-V to 5.25-V input can be supplied by sources including DC/DC regulated supplies (e.g. 3.3 V), or
batteries such as single cell Li+, two-cell or three-cell NiCd, NiMH or alkaline.
The output trip current for the dual USB switches can be programmed via external resistors from as low as
100 mA to as high as 1100 mA.
An auxiliary 5.1-V output is provided, where the total current supplied by the USB outputs and the auxiliary by
cannot exceed 1100 mA.
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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.
PRODUCTION DATA information is current as of publication date.
Copyright © 2009–2010, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.