TPSM82822: Output capacitor value

Xia Tianzhi

Part Number: TPSM82822

The recommended output capacitor value in the datasheet sheet is 10uF~47uF.Should i take the loads', the other IC, bypass capacitors into account?

over 1 year ago

0 Werner Lummer over 1 year ago

TI__Expert 4478 points

Hi Xia,

yes, all capacitance connected to the output must be taken into account. The recommended typical output capacitor value of 2 × 10-μF or 1 × 22-μF should be placed close to the device pin as seen on the layout example in the datasheet.

Regards, Werner

0 Xia Tianzhi over 1 year ago in reply to Werner Lummer

Prodigy 20 points

Thanks for reply.How to estimate the capacitance when i place a bead between TPSM82822's output and other ICs?

+1 Werner Lummer over 1 year ago in reply to Xia Tianzhi

TI__Expert 4478 points

Hi Xia,

unfortunately, it is not possible to predict the impact of the bead from the schematics. I recommend that you measure the total capacitance at the Vout pin, if the effective total capacitance (without bead) is larger than 47μF.

Regards, Werner

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TPSM82822: Output capacitor value