JAJU875 July   2020

 

  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
    1. 1.1 Key System Specifications
  7. 2System Overview
    1. 2.1 ブロック図
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 TPS62864
      2. 2.3.2 TPS62088
      3. 2.3.3 TLV73318
    4. 2.4 System Design Theory
      1. 2.4.1 Designing Buck Converter Circuit TPS62864
      2. 2.4.2 Designing Buck Converter Circuit TPS62088
      3. 2.4.3 Designing Buck Converter Circuit TLV73318
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Testing and Results
      1. 3.1.1 Test Setup
      2. 3.1.2 Test Results
        1. 3.1.2.1 Startup with no load
        2. 3.1.2.2 Load Transient Rail SoC 0.9V
        3. 3.1.2.3 Load Transient Rail NAND I/O 1.2 V
        4. 3.1.2.4 Load Transient Rail NAND VCC 2.5 V
        5. 3.1.2.5 Output Ripple Rail SoC 0.9 V
        6. 3.1.2.6 Output Ripple Rail NAND I/O 1.2 V
        7. 3.1.2.7 Output Ripple Rail NAND VCC 2.5 V
        8. 3.1.2.8 Output Ripple Rail SOC I/O 1.8 V
        9. 3.1.2.9 Efficiency
  9. 4Design Files
    1. 4.1 Schematics
    2. 4.2 Bill of Materials
    3. 4.3 PCB Layout Recommendations
      1. 4.3.1 Layout Prints
    4. 4.4 Altium Project
    5. 4.5 Gerber Files
    6. 4.6 Assembly Drawings
  10. 5Software Files
  11. 6Related Documentation
    1. 6.1 Trademarks
    2. 6.2 Third-Party Products Disclaimer

2.3.2 TPS62088

The TPS62088 device is a high-frequency synchronous step-down converter optimized for small solution size and high efficiency. At medium to heavy loads, the converter operates in PWM mode and automatically enters Power Save Mode operation at light load to maintain high efficiency over the entire load current range. The 4-MHz switching frequency allows TPS62088 to use small external components. Together with its DCS-control architecture, excellent load transient performance and output voltage regulation accuracy are achieved. Other features like over current protection, thermal shutdown protection, active output discharge and power good are built-in. The device is available in a 6-pin WCSP package.

This device offers three variations that have fixed output voltage as shown in Table 2-1. In this reference design, the adjustable version is used but it can be scaled to use a fixed voltage version.

Table 2-1 Device Comparison Table
PART NUMBEROUTPUT VOLTAGE
TPS62088YFPAdjustable
TPS6208812YFP1.2 V
TPS6208818YFP1.8 V
TPS6208833YFP3.3 V