TPS7A94: 2.5V to 1.8V conversion

Vishnu

Part Number: TPS7A94

Tool/software:

If Vout should be 1.8V, what is the value of RFB_PG(BOTTOM) (kΩ) and RFB_PG(TOP) (kΩ) for ICL SETTING (100%)? Kindly explain with formula.

11 months ago

0 Nick Butts 11 months ago

TI__Guru 50025 points

Hi Vishnu,

The information you are looking for is in the table titled "Programmable Current Limit vs Output Voltage".

Regards,

Nick

0 Bhuvaneshwari K 11 months ago in reply to Nick Butts

Intellectual 370 points

Hi Nick,

Could you please let us know what will be the value for K if the output voltage is 1.8V as per above query.

Thanks and regards,

Bhuvaneshwari

0 Nick Butts 11 months ago in reply to Bhuvaneshwari K

TI__Guru 50025 points

Hi Bhuvaneshwari,

K is user defined. You get to choose the PG threshold, and K is the decimal form of the PG threshold in percentage of the nominal VOUT. For example, if you want PG to assert high when VOUT is 95% of the nominal output voltage setting, use K = 0.95. K is independent of the nominal VOUT setting.

Regards,

Nick

0 Bhuvaneshwari K 11 months ago in reply to Nick Butts

Intellectual 370 points

Hi Nick,

Thanks for your response.

Pls confirm whether the calculation of RFB_PG bottom and top resistor value for ICL 100% and Vout is 1.8V

Thanks,

Bhuvaneshwari

0 Nick Butts 11 months ago in reply to Bhuvaneshwari K

TI__Guru 50025 points

Hi Bhuvaneshwari,

Yes, it's configured for 1.8Vout, ICL 100%, and PG threshold 94.5%.

Regards,

Nick

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TPS7A94: 2.5V to 1.8V conversion