[FAQ] TPS65094: Purpose of 0 Ω and 0.002 Ω resistors on EVM?

There are numerous 0 Ω and 0.002 Ω resistors on the EVM as a way to allow for deconstruction of each rail. The 0.002 Ω resistors are used for power inputs and outputs because they guarantee lower resistance than a standard 0 Ω resistor.

These resistors can be removed to provide flexibility to the EVM. For example, the input resistor for PVIN3 can be removed and an external voltage source applied to that net directly in order to measure the efficiency.

One particularly important set of 0 Ω resistors are those on the DRVH and DRVL pins. By replacing these with 10 - 30 Ω (typical) resistors, the switching noise created by the controllers can be reduced, at the cost of some efficiency. By including the 0 Ω resistors on prototype boards, they can be swapped out if the switching noise causes board level noise sensitivity issues.