This section describes the functionality and operation of the TPS389C0XEVM. Refer to the TPS389C03-Q1 Multichannel Overvoltage and Undervoltage I2C Programmable Voltage Supervisor and Monitor with Q&A Watchdog data sheet for details on the electrical characteristics of the device.

The TPS389C0XEVM comes with the TPS389C0300CRTERQ1 IC meaning the device is capable of monitoring up to 3 separate voltage rails and Q&A Watchdog capable. The EVM is capable of many different configurations to fully evaluate the functionality of all the TPS389C03-Q1 device variants. The default jumper configuration of the TPS389C0XEVM is mentioned in Table 3-2.

The TPS389C0XEVM comes with USB to GPIO connector, I²C bus repeaters, comparators, two LDOs, socket and solder down footprints, and the ability to monitor up to six voltage rails. The TPS389C0XEVM also provides the ability for each monitored rail to be voltage divided down by resistor dividers on each of the monitored and input lines. The user must choose appropriately sized resistors such that the divided voltage is above, below or within the window of the voltage threshold depending on the type of input sensing topology is setup for each monitored input channel. Consult the Device Threshold Table in the TPS389C03-Q1 data sheet to verify proper voltage monitored values.

Equipment needed for TPS389C0XEVM evaluation:

• TPS389C0XEVM
• TI's USB2GPIO interface adapter (with ribbon cable) (not included with EVM)
• Power supply (3.3 V)
• Multimeters
• Multi-channel oscilloscope (review evaluation waveforms)
• Jumper wires/cables