SNVU760 February   2021

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Related Documentation
    2. 1.2 TPS3704x-Q1 Applications
  3. 2Schematic, Bill of Materials, and Layout
    1. 2.1 TPS3704Q1EVM Schematic
    2. 2.2 TPS3704Q1EVM Bill of Materials
    3. 2.3 Layout and Component Placement
    4. 2.4 Layout
  4. 3EVM Connectors
    1. 3.1 EVM Test Points
    2. 3.2 EVM Jumpers
  5. 4EVM Setup and Operation
    1. 4.1 Supply Voltage (VDD)
    2. 4.2 Monitoring Input Voltage
    3. 4.3 Default Reset Outputs (RESET1 and RESET2)
    4. 4.4 Optional Reset Output (RESET3)
  6. 5Revision History

4.4 Optional Reset Output (RESET3)

By default, the TPS3704Q1EVM does not support the RESET3 output. In order to use this EVM to evaluate RESET3 the TPS37044-Q1 option that is installed on the board must be replaced by a TPS37043-Q1 device. The TPS37043-Q1 device is capable of monitoring three voltage rails and outputing three active low reset signals. When evaluating this option, the following jumper configurations must be used:

  • Jumper J12 must be shunted in order to connect the RESET3 pin to the TP7 testpoint.

  • Jumper J11 must be placed in either the left or the right position in order for the RESET3 output to be pulled up to VDD or Vpu3 respectively.

  • Jumpers J4 and J8 must be left open.

RESET3 asserts when the voltage on SENSE3 falls outside of the overvoltage or undervoltage threshold window. RESET3 stays asserted for the reset timeout period after SENSE3 falls back within the window threshold.