Current flowing along VIN pin LM5001-Q1

Takao Yamamoto

Genius 4135 points

Other Parts Discussed in Thread: LM5001-Q1, TINA-TI

Dear all,

About LM5001-Q1,

I would like to know the amount of current flowing along VIN pin.

At the page.11 of data sheet '8.1.1 VIN', you say that the current into the VIN pin depends on different factor.

But there is not concrete figure.

So, please teach me the amount of current flowing along VIN pin when this device is active.

To calculate this, is there the calculating formula?

If there is not, is there some measured figure?

Best regards,

0 Haifeng Fan over 10 years ago

I would suggest you to take a look at the following thread:

Thanks.

0 Takao Yamamoto over 10 years ago in reply to Haifeng Fan

Genius 4135 points

Dear Haifeng Fan,

Thank you for your reply.

Additionally, I would like to know more concrete value.

I tried to calculate the value of VIN current by TINA-TI and WEBENCH.

But TINA-TI suggest only 6uA, and WEBENCH doesn't support 400kHz.

→see the attached PDF file

I would like to know VIN current at following condition at SEPIC circuit.

1. Vin=8V, SW=1.5MHz

2. Vin=8V, SW=400kHz

3. Vin=13.5V, SW=400kHz

4. Vin=16V, SW=400kHz

*all condition have the same Vout=19V, Rload=390Ω, Ta=25℃

Vcc-pin is connected 1uF bypass capacitor only.

Best regards,

0 Takao Yamamoto over 10 years ago in reply to Takao Yamamoto

Genius 4135 points

Sorry, I forgot to attach the PDF.

Power management forum