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TPS2505B1 Datasheet Preview

TPS2505B1 Datasheet

Boost Converter/LDO

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TPS2505
SPAS093C – DECEMBER 2009 – REVISED SEPTEMBER 2015
TPS2505 Integrated Dual USB Switches, Boost Converter and LDO
1 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 × 5-mm QFN-20 Package
• Industrial Temperature Range
2 Applications
• Portable Applications Using Single Li+ Cell
• Bus Powered USB Hosts
• USB Hosts Without Native 5-V Supplies
• Computer Peripherals
3 Description
The TPS2505 device 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 overcurrent fault reporting.
The 1.8-V to 5.25-V input can be supplied by sources
including DC-DC regulated supplies (for example, 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 through 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.
Device Information(1)
PART NUMBER PACKAGE
BODY SIZE (NOM)
TPS2505
VQFN (20)
5.00 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
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
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.




etcTI

TPS2505B1 Datasheet Preview

TPS2505B1 Datasheet

Boost Converter/LDO

No Preview Available !

TPS2505
SPAS093C – DECEMBER 2009 – REVISED SEPTEMBER 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics (Shared Boost, LDO and
USB)........................................................................... 5
6.6 Electrical Characteristics (Boost Only)...................... 5
6.7 Electrical Characteristics (USB1/2 Only) .................. 6
6.8 Electrical Characteristics (LDO and Reset Only)...... 7
6.9 Recommended External Components ...................... 7
6.10 Dissipation Ratings ................................................. 7
6.11 Typical Characteristics ............................................ 8
7 Parameter Measurement Information .................. 9
8 Detailed Description ............................................ 10
8.1 Overview ................................................................. 10
8.2 Functional Block Diagram ....................................... 10
8.3 Feature Description................................................. 11
8.4 Device Functional Modes........................................ 18
9 Application and Implementation ........................ 19
9.1 Application Information............................................ 19
9.2 Typical Application ................................................. 19
10 Power Supply Recommendations ..................... 23
11 Layout................................................................... 24
11.1 Layout Guidelines ................................................. 24
11.2 Layout Example .................................................... 24
12 Device and Documentation Support ................. 25
12.1 Community Resources.......................................... 25
12.2 Trademarks ........................................................... 25
12.3 Electrostatic Discharge Caution ............................ 25
12.4 Glossary ................................................................ 25
13 Mechanical, Packaging, and Orderable
Information ........................................................... 25
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (June 2010) to Revision C
Page
• Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional
Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device
and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1
2
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Product Folder Links: TPS2505
Copyright © 2009–2015, Texas Instruments Incorporated


Part Number TPS2505B1
Description Boost Converter/LDO
Maker etcTI
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