TIDUF58 June   2024

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
    4. 2.4 System Design Theory
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Test Setup
    3. 3.3 Test Results
      1. 3.3.1 Output Ripple
      2. 3.3.2 Load Transient
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
      3. 4.1.3 PCB Layout Recommendations
      4. 4.1.4 Altium Project
      5. 4.1.5 Gerber Files
      6. 4.1.6 Assembly Drawings
    2. 4.2 Documentation Support
    3. 4.3 Support Resources
    4. 4.4 Trademarks
  11. 5About the Authors

1 System Description

The TIDA-050073 enables a very simple low output ripple step-down regulator design where the second stage filter is used with TPS62933F synchronous buck converter. This design demonstrates a low output ripple power supply to generate a 1.2V rail at up to 3A of current from 3.8V to 30V input voltage. The optimized internal loop compensation eliminates external compensation components. Low ripple voltage is required for many applications such as ADC, RF transceiver and analog front end (AFE).

Table 1-1 Key System Specifications
Design Parameter Example Value
Input voltage range 24V nominal, 3.8V to 30V
Output voltage range 1.2V
Switching frequency 500kHz
Transient response, 50% load step ∆VO = ±5%
Output ripple voltage <1mV
Output current rating 3A