SLVS440C January   2003  – December 2014 TPS61045

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 Dissipation Rating
    6. 6.6 Electrical Characteristics
    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 Peak Current Control
      2. 7.3.2 Softstart
      3. 7.3.3 Enable (CTRL Pin)
      4. 7.3.4 DAC Output (DO)
      5. 7.3.5 Digital Interface (CTRL)
      6. 7.3.6 UVLO
      7. 7.3.7 Thermal Shutdown
    4. 7.4 Device Functional Modes
  8. 8  Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Analog Adjusted Output Voltage
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Inductor Selection, Maximum Load Current
          2. 8.2.1.2.2 Setting the Output Voltage
          3. 8.2.1.2.3 Output Capacitor Selection
          4. 8.2.1.2.4 Input Capacitor Selection
          5. 8.2.1.2.5 Diode Selection
        3. 8.2.1.3 Application Curves
      2. 8.2.2 OLED Supply with Higher Output Current
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curves
  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 Trademarks
    3. 11.3 Electrostatic Discharge Caution
    4. 11.4 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

1 Features

  • Input Voltage Range from 1.8 to 6 V
  • Output Voltage of up to 28 V Possible
  • Up to 85% Efficiency
  • Digitally Adjustable Output Voltage Control
  • Disconnects Output From Input During Shutdown
  • Switching Frequency up to 1 MHz
  • No Load Quiescent Current 40 μA Typical
  • Thermal Shutdown Mode
  • Shutdown Current 0.1 μA Typical
  • Available in Small 3-mm × 3-mm VSON Package

2 Applications

  • LCD Bias Supply for Small to Medium LCD Displays
  • OLED Display Power Supply
    • PDA, Pocket PC, Smart Phones
    • Handheld Devices
    • Cellular Phones

3 Description

The TPS61045 device is a high-frequency boost converter with digitally-programmable output voltage and true shutdown. During shutdown, the output is disconnected from the input by opening the internal input switch. This allows a controlled power-up and power-down sequencing of the display. The output voltage can be increased or decreased in digital steps by applying a logic signal to the CTRL pin. The output voltage range, as well as the output voltage step size, can be programmed with the feedback divider network. With a high switching frequency of up to 1 MHz, the TPS61045 device allows the use of small external components, and together, with the small 8-pin VSON package, a minimum system solution size is achieved.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS61045 VSON (8) 3.00 mm × 3.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Schematic

Sch_lvs440.gif