SLVS500D DECEMBER   2003  – June 2019 TPS54110

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
  4. 4 Revision History
  5. 5 Device Information
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Recommended Operating Conditions
    3. 7.3 Thermal Information
    4. 7.4 Electrical Characteristics
    5. 7.5 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 VBIAS Regulator (VBIAS)
      2. 8.3.2 Voltage Reference
      3. 8.3.3 Oscillator and PWM Ramp
      4. 8.3.4 Error Amplifier
      5. 8.3.5 PWM Control
      6. 8.3.6 Dead-Time Control and MOSFET Drivers
      7. 8.3.7 Overcurrent Protection
      8. 8.3.8 Thermal Shutdown
      9. 8.3.9 Power Good (PWRDG)
    4. 8.4 Undervoltage Lockout (UVLO)
    5. 8.5 Slow-Start/Enable (SS/ENA)
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Typical TPS54110 Application
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Switching Frequency
          2. 9.2.1.2.2 Input Capacitors
          3. 9.2.1.2.3 Output Filter Components
            1. 9.2.1.2.3.1 Inductor Selection
            2. 9.2.1.2.3.2 Capacitor Selection
          4. 9.2.1.2.4 Compensation Components
          5. 9.2.1.2.5 Bias and Bootstrap Capacitors
        3. 9.2.1.3 Application Curves
      2. 9.2.2 Very-Small Form-Factor Application
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
        3. 9.2.2.3 Application Curves
      3. 9.2.3 Two-Output Sequenced-Startup Application
        1. 9.2.3.1 Design Requirements
        2. 9.2.3.2 Detailed Design Procedure
        3. 9.2.3.3 Application Curve
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Layout Considerations For Thermal Performance
    4. 10.4 Grounding and Powerpad Layout
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • PWP|20
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9.2.1.2.1 Switching Frequency

The switching frequency is set within the range of 280 kHz to 700 kHz by connecting a resistor from the RT pin to AGND. Equation 4 is used to determine the proper RT value.

Equation 4. TPS54110 equation1_lvs500.gif

In this example, the timing-resistor value chosen for R4 is 71.5 kΩ, setting the switching frequency to 700 kHz.

Alternately, the TPS54110 can be set to preprogrammed switching frequencies of 350 kHz or 550 kHz by connecting pins RT and SYNC as shown in Table 3.

Table 3. Design Parameters

FREQUENCY RT SYNC
350 kHz Float Float or AGND
550 kHz Float ≥ 2.5 V