TIDUDT0 September   2022

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
    1. 1.1 Key System Specification
      1. 1.1.1 Intel® Stratix® 10 Power Tree Example
      2. 1.1.2 Intel® Agilex™ Power Tree Example
      3. 1.1.3 Xilinx Versal™ Power Tree Example
      4. 1.1.4 Xilinx Virtex-7® Power Tree Example
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 TPS53688
      2. 2.3.2 TPS650861
      3. 2.3.3 TPSM5D1806
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Test Setup
      1. 3.2.1 TPS53688 Programming Setup
      2. 3.2.2 TPS53688 Transient Test Setup
      3. 3.2.3 TPS650861 Programming Setup
      4. 3.2.4 TPS650861 and TPSM5D1806 Transient Test Setup
    3. 3.3 Test Results
      1. 3.3.1 Efficiency Results
      2. 3.3.2 Transient Results
        1. 3.3.2.1 TPS53688 Transient Results
        2. 3.3.2.2 TPS650861 Transient Results
        3. 3.3.2.3 TPSM5D1806 Transient Results
  9. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
    2. 4.2 Tools and Software
    3. 4.3 Documentation Support
    4. 4.4 Support Resources
    5. 4.5 Trademarks
  10. 5About the Author

2.3.2 TPS650861

The TPS650861 is a configurable PMIC with one-time programmable memory (OTP) where the sequencing and the output voltage can be set on start-up. The device can also be interfaced via I2C for easy configuration changes. The TPS650861 device has three controllers that utilize D-CAP2™ technology allowing very good transient performance to meet FPGA requirements. The device also includes a VTT LDO that can be used for DDR memory in conjunction with Buck 6 of the TPS650861. Furthermore, there are three converters as well that require a 5-V input to the TPS650861, but these are lower current rails that used for the accessory rails on the FPGA.

The power sequencing is controlled by the TPS650861 and can be set with OTP. The TPS650861 has four GPIOs can be programmed to turn on independently in the sequence or come up with the other regulators in the TSP650861. Additionally, the TPS650861 comes with six CTRL pins that can also be used for sequencing. For example, if an external converter has power good functionality, the converter can be tied to one of the six CTRL pins to trigger the rest of the sequence.

For more information on the how to program the TPS650861, there is a booster pack evaluation kit to help users easily program the TPS650861. Additionally, the TPS65086100 Non-Volatile Memory Programming Guide steps users through the programming process.