SLVUCG6 November   2022 TPS650350-Q1

 

  1.   TPS650350-Q1 EVM User's Guide
  2.   Trademarks
  3. 1 Introduction
  4. 2 Requirements
  5. 3 Operation Instructions
    1. 3.1 Configuring the USB to I2C Adapter
    2. 3.2 Regulator Input Supplies and Features
      1. 3.2.1 Buck 1 Input Supply
      2. 3.2.2 Mid-Vin Buck1 Features
      3. 3.2.3 Buck 2/LDO Input Supply
      4. 3.2.4 Buck 3 Input Supply
      5. 3.2.5 Low-Vin Buck2 and Buck3 Features
      6. 3.2.6 Low Noise LDO Features
    3. 3.3 Selecting the Logic Supply Voltage
  6. 4 EVM Configurations
  7. 5 Test Points
    1. 5.1 Voltage Test Points
  8. 6 Graphical User Interface
    1. 6.1 TPS650350-Q1 EVM Debugging
      1. 6.1.1 I2C Communication Port and Adapter Debugging
      2. 6.1.2 Updating MCU Firmware
    2. 6.2 Navigating the GUI
      1. 6.2.1 Home
      2. 6.2.2 Block Diagram
      3. 6.2.3 Registers
      4. 6.2.4 Device Configuration
        1. 6.2.4.1 Using Device Configuration to Define Spin Settings
        2. 6.2.4.2 Configuring the Power Sequence
      5. 6.2.5 Re-Program PMIC
    3. 6.3 In-Circuit Programming
  9. 7 Typical Performance Plots
    1. 7.1 Power Sequence Plots
    2. 7.2 Load Transient Plots
    3. 7.3 Output Voltage Ripple Plots
    4. 7.4 LDO Output Noise
  10. 8 TPS650350-Q1 EVM Schematic
  11. 9 TPS650350-Q1 EVM PCB Layers
  12. 10TPS650350-Q1 EVM Bill of Materials

3.1 Configuring the USB to I2C Adapter

An onboard MCU acts as a USB adapter to the PMIC. This adapter allows I2C communication to the host PC as well as GPIO assertion and monitoring. By default, the onboard adapter is powered by through an onboard dedicated 3.3 V LDO (U5). Additional configurations are allowed by reconfiguring jumpers J24 and J25, shown in Table 3-1 and Table 3-2. The onboard adapter must have power applied through a valid configuration.

Table 3-1 Adapter Power Source (J24)
Selection Jumper PinAdapter Supply Bus
Pin 1 (PMIC Buck 1 Output)Pin 2 (Adapter Input Supply Rail)
Pin 3 (PMIC LDO Output)Pin 4 (Adapter Input Supply Rail)
Pin 5 (Dedicated 3.3 V LDO Output - Default)Pin 6 (Adapter Input Supply Rail)
Table 3-2 Dedicated LDO Supply for Adapter (J25)
Selection Jumper PinDedicated 3.3V LDO Supply Bus
Pin 1 (PMIC Buck 1 Output)Pin 2 (Dedicated 3.3 V LDO Input Rail)
Pin 3 (EVM VIN- Default)Pin 4 (Dedicated 3.3 V LDO Input Rail)
Pin 5 (VBUS Rail)Pin 6 (Dedicated 3.3 V LDO Input Rail)

The following Jumpers in Table 3-3 connect the USB adapter to PMIC functional pins. These can be disconnected for flexibility.

Table 3-3 Adapter PMIC Connections
JumperPMIC Pin

J20

nINT

J21nRST
J22

GPIO

J23

SEQ