The TPS3704Q1EVM allows users to monitor between one and four input voltages depending on the device variant populating the board. The voltages to be monitored are referred to as VIN1, VIN2, VIN3, and VIN4 and are applied to test points TP13 through TP16 respectively. By using jumpers J1 through J8 the user can input either an adjustable or fixed voltage. When the adjustable voltage jumper configuration is used, the voltage measured at sense test points TP1 through TP4 will be scaled down versions of the input voltage applied to TP13 through TP16. The adjustable voltage option is useful when the input voltage to be monitored is higher than the maximum allowable pin voltage specified in the device datasheet.

The fixed input voltage jumper configuration is useful when the input voltage is expected within the voltage window of the sense pin used. For instance the TPS37044A7OHDDFRQ1, which comes populated on the board, has a threshold voltage of 3.3 V (±8%) on SENSE1 pin. Therefore, a 3.3 V rail could be monitored by connecting the rail to TP13 with the FIXED VIN jumper configuration as outlined in Table 3-2.

Figure 4-3, Figure 4-4, and Figure 4-5 show the OVLO and UVLO thresholds for RESET1 and RESET2 for the fixed input voltage jumper configuration. Note that in Figure 4-3 SENSE2 is held within the voltage threshold window, while in Figure 4-4 SENSE1 is held wihtin its voltage threshold window.