TPS62903-Q1: Review | PTPS62903-Q1 | 0.4W

felix thomas

Prodigy 80 points

Part Number: TPS62903-Q1

Please review the schematics and provide an overall review.

Also, provide comments on the following

Value of inductor
Value of capacitor
Type of capacitor
Should there be any other "No mount" Components required?
ptps62903-q1.pdf

over 1 year ago

0 felix thomas over 1 year ago

Prodigy 80 points

Password for ptps62903-q1.pdf : 1qa@WS

0 Joseph Conrad over 1 year ago in reply to felix thomas

TI__Expert 7860 points

Hi Felix,

- For the inductor I would recommend using 1uH since 2.5MHz switching frequency is selected.

- The input and output capacitors look good.

- Ceramic capacitors can be used here. The specific rating of the capacitor will depend on your design requirements, ambient temp, tolerance.

- For the EVM, 10uF, X8R, 25V ceramic capacitors are used for the input.

- You can also check the EVM Users guide for a complete BOM of parts used.

- If there is any requirement on output voltage ripple, you may leave an additional "no mount" component for the input or output capacitors.

Thanks,

Joseph

0 felix thomas over 1 year ago in reply to Joseph Conrad

Prodigy 80 points

Hi Joseph

Thanks for the reply

Since the Max Output current is only 0.271A.

Inductor ripple current(ΔI) for 2.5Mhz, 2.2µH & 0.25(Dutyratio) will be : 0.204A
Inductor ripple current(ΔI) for 2.5Mhz, 1µH & 0.25(Dutyratio) will be : 0.45 A

So to get continuous current consumption, will it be better to use 2.2µH rather than using 1µH?

+1 Joseph Conrad over 1 year ago in reply to felix thomas

TI__Expert 7860 points

Hi Felix,

Yes, given that you have Auto PWM/PFM mode selected, if you want to maintain continuous current it will be better to select the 2.2uH.

Thanks,

Joseph

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TPS62903-Q1: Review | PTPS62903-Q1 | 0.4W