SLVUCG3A September 2022 – March 2023 TPSM33625
4 Schematic
Customers can choose to implement a PI filter in series with the input of a power regulator, which allows for the differential noise generated to be attenuated, allowing a noise emission regulation to be met. The filter crossover frequency is designed for 1-MHz switching frequency, attenuating the switching frequency and the corresponding harmonics greatly. A damping capacitor is provided (C5), to damp the high-Q PI filter. For more information on filter damping, see Section 8.
Figure 4-1 Schematic-Compliance Testing FilterIn the buck schematic, the difference between the TPSM33625EVM and TPSM33625FFEVM is the REFDES=U1 device part number. Use a buck schematic with additional feedback resistors to program the output voltage and add a placeholder for additional output capacitance to achieve stability or meet a output transient specification with pin definition RT (adjustable frequency) or Mode/Sync (mode select or synchronization) differing.
Figure 4-2 Schematic (TPSM33625EVM) – TPSM33625
Figure 4-3 Schematic (TPSM33625FEVM) – TPSM33625FA disable, frequency select, and output voltage select jumper are provided to aid the evaluation. Additionally, test points to evaluate product features and stability are provided.
Figure 4-4 Schematic (TPSM33625EVM) – Configuration Jumpers and Evaluation Test PointsA disable, mode select or synchronization, and output voltage select jumper are provided to aid the evaluation. Additionally, test points to evaluate product features and stability are provided.
Figure 4-5 Schematic (TPSM33625FEVM) – Configuration Jumpers and Evaluation Test Points