SLVUCB0A September 2021 – November 2022 TPSM82864A , TPSM82866A
The loop response can be measured with simple changes to the circuitry. First, install a 10-Ω resistor across the pads of R6 on the back of the PCB. The pads are spaced to allow installation of an 0603-sized resistor. Next, cut the short section of trace on the top layer between the via near R1 and the VOUT plane. Figure 1-1 shows this change. With these changes, an AC signal (10-mV, peak-to-peak amplitude recommended) can be injected into the control loop across the added 10-Ω resistor. Figure 4-3 shows the results of this test.