SLUSG30 December   2025 TPS62A0569 , TPS62A0569A

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 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 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Power Save Mode
      2. 7.3.2 100% Duty Cycle Low Dropout Operation
      3. 7.3.3 Soft Start
      4. 7.3.4 Switch Current Limit and Short-Circuit Protection (HICCUP)
      5. 7.3.5 Undervoltage Lockout
      6. 7.3.6 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Enable and Disable
      2. 7.4.2 Power Good
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
    3. 8.3 Design Requirements
    4. 8.4 Detailed Design Procedure
      1. 8.4.1 Setting the Output Voltage
      2. 8.4.2 Input and Output Capacitor Selection
      3. 8.4.3 Output Filter Design
    5. 8.5 Application Curves
    6. 8.6 Power Supply Recommendations
    7. 8.7 Layout
      1. 8.7.1 Layout Guidelines
      2. 8.7.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

8.4.2 Input and Output Capacitor Selection

The architecture of the TPS62A0569 allows use of tiny ceramic-type output capacitors with low equivalent series resistance (ESR). These capacitors provide low output voltage ripple and are thus recommended. To keep resistance up to high frequencies and to achieve narrow capacitance variation with temperature, TI recommends to use X7R or X6S dielectric.

The input capacitor is the low impedance energy source for the converter that helps provide stable operation. TI recommends a low-ESR multilayer ceramic capacitor for best filtering. For the values see table Recommended Operating Conditions.

The TPS62A0569 is designed to operate with a variety of output capacitor and inductor combinations which are outlined in Matrix of Output Voltage, Capacitor and Inductor Combinations With TPS62A0569x. The tolerated effective inductor and capacitor values are also outlined in table Recommended Operating Conditions. Other combinations are possible but then a Bode plot must be performed to verify phase reserve with the given inductor, output capacitor and feed forward capacitor for best stability. This also valid when components with derating different from the BOM in this datasheet are used.

The feedforward capacitor improves the load transient response and can have a positive impact on the phase reserve in combination with larger output capacitors. With smaller output capacitors phase reserve can be reduced. The optimum value is typically between 10pF and 120pF when using R2 = 100kΩ. With different value for R2 the CFF range needs to be recalculated. The application note Feedforward Capacitor to Improve Stability and Bandwidth discusses this topic in detail.