This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS628502-Q1: Ripple Voltage Measurement

Part Number: TPS628502-Q1

Hello Team,

Good day

We are using TPS628502-Q1 part in our design for 3.3V to 1.2V conversion. We have a requirement that output voltage ripple should be less than 6mV. But while measuring in DSO we are getting around 12mV pk to pk ripple voltage across output capacitor. Can provide any feedback or suggestion how we can improve ripple voltage across output.

Below parameters are considered in our design:

1. Vin = 3.3V

2. Vout = 1.2V

3. Cin = 4.7uF (2 Nos.) + 0.1uF (1 Nos.)

4. MODE pin tied to VCC

5. COMP/FSET pin tied directly to GND

6. Cout = 22uF (2Nos.) + 0.1uF (1 Nos.)

7. Rfb1 = 10Kohm & Rfb2 = 10Kohm, Cff = 10pF


Let us know how we can improve ripple voltage to 6mV or less.

Thanks & Regards

Subham PradhanRipple Voltage Test_1.2V.pdf