TPS51200A-Q1: Request for circuit diagram review

WOOHYUN NAM

Prodigy 170 points

Part Number: TPS51200A-Q1

I wish to verify whether there is a problem with the circuit diagram.

2 months ago

0 Sathish Vallamkonda 2 months ago

TI__Expert 6685 points

Hi Woohyun,

Thank you for reaching out on E2E. I will review the schematic and provide my feedback before end of Friday. Thank you for your patience.

Sathish

0 Sathish Vallamkonda 2 months ago in reply to Sathish Vallamkonda

TI__Expert 6685 points

Hi Woohyun,

Schematic looks good, except the cap at VIN pin must be increased to 4.7uF.

Sathish

0 WOOHYUN NAM 2 months ago in reply to Sathish Vallamkonda

Prodigy 170 points

Hi Sathish Vallamkonda

Thank you for reviewing the circuit.
The PCB was manufactured with a 1μF 0603 (mm) capacitor. Would changing it to 1μF cause any operational issues?
As there is no 0603 (mm) 4.7μF option in the AEC-Q specification, we would request a re-review should this be changed during PCB modification.

0 Sathish Vallamkonda 2 months ago in reply to WOOHYUN NAM

TI__Expert 6685 points

Hi Woohyun,

does this work for your application?

https://www.digikey.com/en/products/detail/murata-electronics/GRT188C71C475KE13D/13996898

Sathish

0 WOOHYUN NAM 1 month ago in reply to Sathish Vallamkonda

Prodigy 170 points

This is identical to the specifications you shared.

C39 1UF -> 4.7UF (https://product.samsungsem.com/mlcc/CL10Y475KO96PN.do)

Regarding your additional enquiry, could you please inform us what issues arise when applying 1UF(C39)?

0 Sathish Vallamkonda 1 month ago in reply to WOOHYUN NAM

TI__Expert 6685 points

Hi Woohyun,

sure, you can use an identical capacitor of your choice.

The main purpose of the input capacitor is to stabilize the input supply voltage. If the supply is not clean it may suffer from poor performance in transient load conidtions.

Sathish

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TPS51200A-Q1: Request for circuit diagram review