TPS7B82-Q1: How much current does this IC Consume

Gokul Kasilingam

Prodigy 90 points

Part Number: TPS7B82-Q1

Tool/software:

Hi,

Vin = 12V

Vout=5V

Iout=35mA

With this how much current is consumed by this IC to produce the specified.

Regards,

Gokul

over 1 year ago

0 Ishaan Shetye over 1 year ago

TI__Genius 13670 points

From fig 6.1 on the datasheet, the quiescent current consumed by the IC for the aforementioned conditions is approximately 90 μA

0 Gokul Kasilingam over 1 year ago in reply to Ishaan Shetye

Prodigy 90 points

Hi Ishaan,

Sorry for the late reply.

I need to know how much current is used to convert 12V to 5V.

In general Pin = Pout under ideal with no loss.

Vin x Iin = Vout x Iout

Iin ~= 145mA

Regards,

Gokul

+1 Ishaan Shetye over 1 year ago in reply to Gokul Kasilingam

TI__Genius 13670 points

Hi Gokul,

For LDOs, Pin = Pout is never true. The maximum achievable efficiency (which itself is theoretical and never practical) equals the conversion ratio (Vout/Vin) which in this case is 41.6%. The input current equals the output current plus the quiescent current (which is the current consumed by the control circuitry when the device is ON). The values you specified for Iin and Iout are not concurrent per the above. I suggest checking specifications for output current and estimating the input current using 'Iin = Iout + 90μA'.

0 Gokul Kasilingam over 1 year ago in reply to Ishaan Shetye

Prodigy 90 points

Hi Ishaan,

Thanks for your reply.

Regards,

Gokul

0 Ishaan Shetye over 1 year ago in reply to Gokul Kasilingam

TI__Genius 13670 points

You're welcome!

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TPS7B82-Q1: How much current does this IC Consume