SLVSI89A March   2026  – June 2026 TPS63820

PRODUCTION DATA  

  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 Timing Requirements
    7. 6.7 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  Control Scheme
        1. 7.3.1.1 Buck Operation
        2. 7.3.1.2 Boost Operation
        3. 7.3.1.3 Buck-Boost Operation
      2. 7.3.2  PFM Operation
      3. 7.3.3  Ultra-sonic Mode Operation
      4. 7.3.4  Forced-PWM Operation (FPWM)
      5. 7.3.5  Ramp-PWM Operation (RPWM)
      6. 7.3.6  Device Enable (EN)
      7. 7.3.7  Undervoltage Lockout (UVLO)
      8. 7.3.8  Soft Start
      9. 7.3.9  Dynamic Voltage Scaling
      10. 7.3.10 Protection Functions
        1. 7.3.10.1 Input Voltage Protection (IVP)
        2. 7.3.10.2 Output Voltage Protection (OVP)
        3. 7.3.10.3 Current Limit Mode and Overcurrent Protection
        4. 7.3.10.4 Output Short-Circuit Protection (Hiccup)
        5. 7.3.10.5 Thermal Shutdown
      11. 7.3.11 Power Good
      12. 7.3.12 Load Disconnect
      13. 7.3.13 Output Discharge
    4. 7.4 Device Functional Modes
    5. 7.5 Programming
      1. 7.5.1 Serial Interface Description
      2. 7.5.2 Standard-, Fast-, and Fast-Mode Plus Protocol
      3. 7.5.3 I2C Update Sequence
  9. 8 Register Map
    1. 8.1 Register Description
      1. 8.1.1 Register Map
      2. 8.1.2 Register CONTROL (Register address: 0x01; Default: 0xE0 or 0x40)
      3. 8.1.3 Register STATUS (Register address: 0x02; Default: 0x00)
      4. 8.1.4 Register DEVID (Register address: 0x03; Default: 0x20)
      5. 8.1.5 Register VOUT1 (Register address: 0x04; Default: 0x54)
      6. 8.1.6 Register CONTROL2 (Register address: 0x06; Default: 0x08)
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 1.2V to 5.5V Output Power Supply
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Inductor Selection
          2. 9.2.1.2.2 Output Capacitor Selection
          3. 9.2.1.2.3 Input Capacitor Selection
        3. 9.2.1.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Third-Party Products Disclaimer
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Receiving Notification of Documentation Updates
    4. 10.4 Support Resources
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information
    1.     79
9.2.1.2.1 Inductor Selection

Ti recommends to use the TPS63820 and TPS638201 devices with 0.47µH inductor. For high efficiencies, use an inductor with a low DC resistance (DCR) and low core losses.

The saturation current of the inductor must be greater than the maximum inductor current in the application. To include sufficient margin for worst-case and transient operating conditions, use an inductor with saturation current that is at least 20% higher than the maximum inductor current in the application. The maximum current in the inductor occurs when the device operates in boost mode and the following is true:

  • The input voltage is at the minimum value.
  • The output voltage is at the maximum value.
  • The output current is at the maximum value.

To calculate the maximum inductor current, first use Equation 1 to calculate the maximum duty cycle during boost operation (which is when the maximum inductor current occurs).

Equation 1. TPS63820

where

  • D is the duty cycle
  • VI is the input voltage
  • VO is the output voltage

Next, use Equation 2 to calculate the maximum inductor current.

Equation 2. TPS63820

where

  • ILM is the peak inductor current
  • IO is the output current
  • η is the converter efficiency (use the value from the application curves or assume 90%)
  • D is the duty cycle (calculated with Equation 1)
  • VI is the input voltage
  • f is the switching frequency (assume 1.5MHz)
  • L is the inductance (use 0.47µH)

To include enough margin for transient conditions, use an inductor with a saturation current rating at least 20% higher than the calculated maximum current.