SPAS093C December   2009  – September 2015 TPS2505

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Electrical Characteristics (Shared Boost, LDO and USB)
    6. 6.6  Electrical Characteristics (Boost Only)
    7. 6.7  Electrical Characteristics (USB1/2 Only)
    8. 6.8  Electrical Characteristics (LDO and Reset Only)
    9. 6.9  Recommended External Components
    10. 6.10 Dissipation Ratings
    11. 6.11 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  PGND
      2. 8.3.2  IN
      3. 8.3.3  EN
      4. 8.3.4  GND
      5. 8.3.5  ILIM1/2
      6. 8.3.6  RESET
      7. 8.3.7  LDOOUT
      8. 8.3.8  LDOIN
      9. 8.3.9  ENLDO
      10. 8.3.10 FAULT1/2
      11. 8.3.11 ENUSB1/2
      12. 8.3.12 USB1/2
      13. 8.3.13 AUX
      14. 8.3.14 SW
      15. 8.3.15 Thermal Pad
      16. 8.3.16 Boost Converter
        1. 8.3.16.1 Start-Up
        2. 8.3.16.2 Normal Operation
        3. 8.3.16.3 Low-Frequency Mode
        4. 8.3.16.4 No-Frequency Mode
        5. 8.3.16.5 Pulsed Frequency Mode (PFM) Light-Load Operation
        6. 8.3.16.6 Overvoltage Protection
        7. 8.3.16.7 Overload Conditions
        8. 8.3.16.8 Determining the Maximum Allowable AUX and USB1/2 Current
      17. 8.3.17 USB Switches
        1. 8.3.17.1 Overview
        2. 8.3.17.2 Overcurrent Conditions
        3. 8.3.17.3 FAULT1/2 Response
        4. 8.3.17.4 Undervoltage Lockout
        5. 8.3.17.5 Programming the Current-Limit Threshold Resistor RILIM
      18. 8.3.18 3.3-V LDO
      19. 8.3.19 Reset Comparator
      20. 8.3.20 Thermal Shutdown
      21. 8.3.21 Component Recommendations
        1. 8.3.21.1 Boost Inductor
        2. 8.3.21.2 IN Capacitance
        3. 8.3.21.3 AUX Capacitance
        4. 8.3.21.4 USB Capacitance
        5. 8.3.21.5 ILIM1/2 and FAULT1/2 Resistors
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Step-by-Step Design Procedure
        2. 9.2.2.2 Switching Frequency
        3. 9.2.2.3 AUX Voltage
        4. 9.2.2.4 Determine Maximum Total Current (IAUX + ILDO + IUSB1 + IUSB2 )
        5. 9.2.2.5 Power Inductor
        6. 9.2.2.6 Output AUX Capacitor Selection
        7. 9.2.2.7 Output USB1/2 Capacitor Selection
        8. 9.2.2.8 Input Capacitor Selection
          1. 9.2.2.8.1 Current-Limit Threshold Resistor RILIM
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Community Resources
    2. 12.2 Trademarks
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

10 Power Supply Recommendations

The device is designed to operate with an input voltage supply range from 1.8 V to 5.25 V. This input supply can be from a single-cell Li-ion, two-cell or three-cell NiCd, NiMH or alkaline, or an externally regulated supply. If the input supply is located more than a few inches from the TPS2505, additional bulk capacitance may be required in addition to the ceramic bypass capacitors. An electrolytic capacitor with a value of 10 μF is a typical choice.