TPS561201: Pattern design with small PCB area using TPS561201

k-iwase

Part Number: TPS561201

I plan to use TPS561201 to input 5V and output 2.5V, but the usable area on the PCB is only about 9mm * 19mm, so I can't design a pattern with as much margin as the evaluation board (TPS561201EVM-896).
Please provide a better way to design with this area.

The conditions are as follows:
・5V input, 2.5V output
・Current ≤0.6A
・Assumed number of board layers: 2 or 4 layers

The selected parts are:
(I selected the parts myself after looking at the recommended parameter ranges for the parts in Power Designer)
・Cin: GRM32ER71E226KE15L (22uF ±10% 25V X7R 3225 metric)
・Cbst: C0603C104K5RAC7867 (0.1uF ±10% 50V X7R 1608 metric)
・L1: DFE322512F-3R3M=P2 (3.3uH 2A 108mΩ 3225 metric)
・Rfbt: RC0603FR-0722K6L (22.6kΩ ±1% 1/10W 1608 metric)
・Rfbb: RC0603FR-0710KL (10kΩ ±1% 1/10W 1608 metric)
・Cout: GRM32ER71A476KE15L (47uF ±10% 10V X7R 3225 metric)

Best regards,

Kazuya Iwase

over 1 year ago

0 Harry Zhou over 1 year ago

TI__Expert 3900 points

Hi Kazuya,

I will try to arrange it according to your request and get back to you later。

Best Regards,

Zhou

0 Harry Zhou over 1 year ago

TI__Expert 3900 points

Hi Kazuya,

For your reference, and you can continue to optimize.

NOTE: I am not sure if I got the footprint wrong!

Best Regards,

Zhou

0 k-iwase over 1 year ago in reply to Harry Zhou

Prodigy 20 points

Dear Zhou,
Thank you for introducing the pattern created in the 9mm x 19mm area.
By the way, I think that you presented only Layer 1, but if Layer 2 has already been created, could you introduce it?

Best Regards,

Kazuya Iwase

0 Harry Zhou over 1 year ago in reply to k-iwase

TI__Expert 3900 points

Hi Kazuya,

Your seriousness is really impressive, hahaha!

Best regards

Zhou

0 k-iwase over 1 year ago in reply to Harry Zhou

Prodigy 20 points

Dear Zhou,
Thank you for introducing the second layer.
I am very happy that the parts fit into this area.
However, I would like to know whether this pattern can output the desired voltage correctly and the current as specified, and what the difference will be in terms of circuit operation compared to the recommended pattern.
What do you think about this?

Best Regards,

Kazuya Iwase

0 Harry Zhou over 1 year ago in reply to k-iwase

TI__Expert 3900 points

Hi Kazuya,

Sorry, we currently do not have the conditions to complete the actual test of this solution. As mentioned before, your 9mm * 19mm requirement can be met, this design is used as a reference. The specific actual performance still needs to be verified by the customer on the actual board.

Best Regards,

Zhou

+1 k-iwase over 1 year ago in reply to Harry Zhou

Prodigy 20 points

Dear Zhou,

I've got it.
Thank you for your support.

Best Regards,

Kazuya Iwase

Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.

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TPS561201: Pattern design with small PCB area using TPS561201