SLVS497F SEPTEMBER   2003  – June 2016 TPS65140 , TPS65141 , TPS65145

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
    6. 6.6 Dissipation Ratings
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Main Boost Converter
      2. 7.3.2 Power Good Output
      3. 7.3.3 Enable and Power-On Sequencing (EN, ENR)
      4. 7.3.4 Positive Charge Pump
      5. 7.3.5 Negative Charge Pump
      6. 7.3.6 Linear Regulator Controller
      7. 7.3.7 Soft Start
      8. 7.3.8 Fault Protection
      9. 7.3.9 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Enabling and Disabling the Device
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Boost Converter Design Procedure
          1. 8.2.2.1.1  Inductor Selection
          2. 8.2.2.1.2  Output Capacitor Selection
          3. 8.2.2.1.3  Input Capacitor Selection
          4. 8.2.2.1.4  Rectifier Diode Selection
          5. 8.2.2.1.5  Converter Loop Design and Stability
          6. 8.2.2.1.6  Design Procedure Quick Steps
          7. 8.2.2.1.7  Setting the Output Voltage and Selecting the Feedforward Capacitor
          8. 8.2.2.1.8  Compensation
          9. 8.2.2.1.9  Negative Charge Pump
          10. 8.2.2.1.10 Positive Charge Pump
          11. 8.2.2.1.11 Linear Regulator Controller
      3. 8.2.3 Application Curves
    3. 8.3 System Examples
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Thermal Considerations
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Related Links
    4. 11.4 Receiving Notification of Documentation Updates
    5. 11.5 Community Resources
    6. 11.6 Trademarks
    7. 11.7 Electrostatic Discharge Caution
    8. 11.8 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

1 Features

  • 2.7-V to 5.8-V Input Voltage Range
  • 1.6-MHz Fixed Switching Frequency
  • 3 Independent Adjustable Outputs
  • Main Output up to 15 V With <1% Typical Output Voltage Accuracy
  • Virtual Synchronous Converter Technology
  • Negative Regulated Charge Pump Driver VO2
  • Positive Charge Pump Converter VO3
  • Auxiliary 3.3-V Linear Regulator Controller
  • Internal Soft Start
  • Internal Power-On Sequencing
  • Fault Detection of All Outputs (TPS65140 and TPS65145)
  • No Fault Detection (TPS65141)
  • Thermal Shutdown
  • System Power Good
  • Available in 24-Pin HTSSOP and 24-Pin VQFN PowerPAD™ Packages

2 Applications

  • TFT LCD Displays for Notebooks
  • TFT LCD Displays for Monitors
  • Portable DVD Players
  • Tablet PCs
  • Car Navigation Systems
  • Industrial Displays

Block Diagram

TPS65140 TPS65141 TPS65145 FBD_01_SLVS497.gif

3 Description

The TPS6514x series offers a compact and small power supply solution to provide all three voltages required by thin film transistor (TFT) LCD displays. The auxiliary linear regulator controller can be used to generate a 3.3-V logic power rail for systems powered by a 5-V supply rail only.

The main output VO1 is a 1.6-MHz fixed frequency PWM boost converter providing the source drive voltage for the LCD display. The device is available in two versions with different internal switch current limits to allow the use of a smaller external inductor when lower output power is required. The TPS65140 and TPS65141 has a typical switch current limit of 2.3 A and the TPS65145 has a typical switch current limit of 1.37 A. A fully integrated adjustable charge pump doubler or tripler provides the positive LCD gate drive voltage. An externally adjustable negative charge pump provides the negative gate drive voltage. Due to the high 1.6-MHz switching frequency of the charge pumps, inexpensive and small 220-nF capacitors can be used.

Additionally, the TPS6514x series has a system power good output to indicate when all supply rails are acceptable. For LCD panels powered by 5 V the device has a linear regulator controller using an external transistor to provide a regulated 3.3-V output for the digital circuits. For maximum safety, the TPS65140 and TPS65145 goes into shutdown as soon as one of the outputs is out of regulation. The device can be enabled again by toggling the input or the enable (EN) pin to GND. The TPS65141 does not enter shutdown when one of its outputs is below its power good threshold.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS6514x HTSSOP (24) 7.80 mm × 4.40 mm
VQFN (24) 4.00 mm × 4.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

4 Revision History

Changes from E Revision (November 2012) to F Revision

  • Added ESD Ratings table, Thermal Information table, Feature Description section, Device Functional Modes section, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information sectionGo
  • Deleted Ordering Information table; see POA at the end of the data sheetGo
  • Changed typical value of VREF to 1.213 V from 1.13 VGo
  • Moved Figure 12 through Figure 23 from Typical Applications to Application CurvesGo