TPS65262-2: TPS65262-2RHBR : Schematics Review

Nachiketh Karanth

Intellectual 810 points

Part Number: TPS65262-2

Hi Team,

Please review the schematics attched for the below parameters,

VIN_LDO : 5V, LDO1_OUT : 3.3V, LDO2_OUT : NC

VIN_BUCK : 5V, BUCK1_OUT : 1.8V, BUCK1_SS : 1.2ms, BUCK2_OUT : 2.5V, BUCK3_OUT : 0.85V

TPS65262-2RHBR.pdf

Thanks

2 months ago

0 William Lai(CFAE) 2 months ago

TI__Intellectual 1530 points

Hi Nachiketh,

The schematic looks fine.
Thanks

Kind Regards,
William

0 Nachiketh Karanth 2 months ago in reply to William Lai(CFAE)

Intellectual 810 points

Hi William,

1. How to calculate the feed-forward capacitors near the outputs, Is there any formula for it?

2. Are the current feed-forward capacitors used correct?

Thanks

0 William Lai(CFAE) 2 months ago in reply to Nachiketh Karanth

TI__Intellectual 1530 points

Hi Nachiketch,

Please check the comments below:

1. Here is the formula to calculate the feed forward capacitor

fco = cross-over frequency. It is usually switching frequency/10

R1 is the top feedback resistor.
R2 is the bottom resistor.

2. Start with 50 pf
If there any low frequency ripple in the output, you can try to increase the Cff value to reduce the ripple.

Thanks.

Best Regards,
William

Power management

Power management forum

TPS65262-2: TPS65262-2RHBR : Schematics Review