LMR43610-Q1: Power Conversion Efficiency at Light Loads

Nakayama Kentaro

Part Number: LMR43610-Q1

Tool/software:

Hello experts,

What is the power conversion efficiency of the LMR43610-Q1 at light loads?

We have the possibility of 60uA output, and we would like to share information on the power conversion efficiency curve when outputting 60uA.

Regards,

Kentaro

2 months ago

0 Ridge Lahti 2 months ago

TI__Genius 13565 points

Hi Kentaro,

It depends on the operating conditions. Assuming Vin=12V, Vout=5V, Fsw=2.2MHz, and Iout=60uA, then the efficiency would be around 74% at room temperature (TA=25C). If you have different conditions we check those. If this does not meet your requirement, we have other devices to suggest.

Best regard,

Ridge

0 Nakayama Kentaro 2 months ago in reply to Ridge Lahti

Intellectual 745 points

Hello Ridge,

Thank you for response.

The conditions are 12V input and 3.3V output. The switching frequency can be left at 2.2MHz.

If you can prepare data for an operating temperature of 85°C and 105°C, please share it.

Is the answer to this question about power conversion efficiency good with a simple recognition of power conversion efficiency?

When calculating the input current, I am aware that the quiescent current of the IC is added separately.

As an additional condition, in addition to the 60uA output, the data at the 2mA output is also required.

Regards,

Kentaro

0 Ridge Lahti 2 months ago in reply to Nakayama Kentaro

TI__Genius 13565 points

Hi Kentaro,

I will reach out to the team regarding the light load at higher ambient temperatures and plan to update this thread next week.

The efficiency of the device includes the current required for the IC to operate, and represent total current consumption by the IC at a given load.

Best regards,

Ridge

0 Nakayama Kentaro 2 months ago in reply to Ridge Lahti

Intellectual 745 points

Hello Ridge,

Thank you for response.

We look forward to hearing from you.

BR,

Kentaro

0 Ridge Lahti 2 months ago in reply to Nakayama Kentaro

TI__Genius 13565 points

Hi Kentaro,

I will update you next week.

Best regards,

Ridge

0 Nakayama Kentaro 2 months ago in reply to Ridge Lahti

Intellectual 745 points

Hello Ridge,

Thank you for your consideration. What is the current situation?

BR,

Kentaro

0 Ridge Lahti 2 months ago in reply to Nakayama Kentaro

TI__Genius 13565 points

Hello Kentaro,

I will have the data by the end of the day Thursday (Santa Clara Time)

Best regards,

Ridge

0 Nakayama Kentaro 2 months ago in reply to Ridge Lahti

Intellectual 745 points

Hello Ridge,

Thank you for response.

We look forward to hearing from you.

BR,

Kentaro

+1 Ridge Lahti 2 months ago in reply to Nakayama Kentaro

TI__Genius 13565 points

Hi Kentaro,

Please refer to the attached data at similar conditions to your request. The input voltage and Fsw are slightly different, but this minor difference will not have a major impact on your efficiency assessment.

Best regards,

Ridge

0 Nakayama Kentaro 2 months ago in reply to Ridge Lahti

Intellectual 745 points

Hello Ridge,

Thank you for response.

My doubts were resolved.

BR,

Kentaro

0 Ridge Lahti 2 months ago in reply to Nakayama Kentaro

TI__Genius 13565 points

Hi Kentaro,

Since this question is resolved, I will close this thread. If you have more questions, you can re-open this thread by replying or create a new thread.

Best regards,

Ridge

Power management

Power management forum

LMR43610-Q1: Power Conversion Efficiency at Light Loads