JAJU823 August   2021

 

  1.   概要
  2.   リソース
  3.   特長
  4.   アプリケーション
  5.   5
  6. 1System Description
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
    4. 2.4 System Design Theory
      1. 2.4.1 Buck Converter Circuit Design Using TPS62903
  8. 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 Startup
      2. 3.3.2 Load Transient
      3. 3.3.3 Output Ripple
      4. 3.3.4 Efficiency
      5. 3.3.5 Thermal Performance
      6. 3.3.6 Output Voltage vs. Output Current
  9. 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
        1. 4.1.3.1 Layout Prints
      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 サポート・リソース
    4. 4.4 Trademarks
  10. 5About the Author

1 System Description

The TIDA-050052 is designed by using the TPS62903 high efficiency and low IQ DC/DC Buck converter. The design is optimized for small total solution size, low BOM count, high efficiency, best thermal performance, and lowest quiescent current possible. This design is ideal for applications where space is limited such as smart lock, wearable devices, and so on. The high efficiency and low IQ are ideal for battery operated systems. The design allows to efficiently use the battery power and extend its life time.

Table 1-1 Key System Specifications
PARAMETER MIN Typical MAX UNIT
Input Voltage 3 12 17 V
Output Voltage 1.185 1.2 1.215 V
Output Current 0 3 A
Switching Frequency 2.5 MHz
Operating Quiescent Current (Power Save Mode) 4 uA
Junction Temperature -40 150 C
Output Capacitor Discharge Enabled