Voltage supervisor for 3.3V rails — the 2.64V threshold
The TPS3836L30DBVRG4: Its 2.64V threshold means the reset asserts when the supply drops below that level, holding the processor in reset until the rail recovers and the 10ms minimum timeout expires. This prevents code corruption during brownout or power-up sequencing.
Active-low push-pull output — no external pull-up needed
The reset output is active-low push-pull (totem pole), so it drives the reset pin directly without an external pull-up resistor. That saves one component per rail and simplifies the BOM for space-constrained designs.
