TPS2505 Datasheet, PDF (1/28 Pages) Texas Instruments – INTEGRATED DUAL USB SWITCHES, BOOST CONVERTER AND LDO

TPS2505
www.ti.com
SPAS093A – DECEMBER 2009 – REVISED FEBRUARY 2010
INTEGRATED DUAL USB SWITCHES, BOOST CONVERTER AND LDO
Check for Samples: TPS2505
FEATURES
1
• Integrated Synchronous Boost Converter, LDO
and Dual USB Current-Limited Switches
• 1.8-V to 5.25-V Input Voltage
(2.2-V Minimum Start-Up Voltage)
• Adjustable Independent USB Current Limit
– 100 mA to 1100 mA
• Auxiliary 5.1-V Output
• 3.3-V Linear Regulator Output
• Inrush Current < 100 mA
• Minimal External Components Required
• Deglitched Independent Fault Reporting
• Small 5-mm x 5-mm QFN-20 Package
• Industrial Temperature Range
Typical Application
2.2µH
HUB
CONTROLLER
Power
Supply
IN
1.8V – 5.25V
10µF
EN
SW
RESET
LDOOUT
EN_LDO
5V Output
RFAULT 1
RFAULT 2
LDOIN
AUX
USB1
22µF
TPS2505
FAULT 1
USB2
FAULT 2
ILIM1
ENUSB1
ENUSB2
ILIM2
GND PAD PGND
3.3V Power
1µF
5V USB Power
120µF
5V USB Power
120µF
RLIM1
RLIM2
APPLICATIONS
• 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.
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.
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 © 2009–2010, Texas Instruments Incorporated