LP876242-Q1: Please recommend an IC with low output ripple

Charlie Xiao

Part Number: LP876242-Q1
Other Parts Discussed in Thread: LP8764-Q1

Hi,

My customer has the following requirements: Input voltage: 3.3V, output voltage: 0.9V, rated current: 4A, output voltage ripple :0.2% of Vout

By interleaving and paralleling, do we have products that meet customer requirements? If not, please recommend a device that can provide as low output ripple as possible. Q1 or not-Q1 is fine.

Regards,

Charlie

over 2 years ago

+1 Ishtiaque Panhwar over 2 years ago

TI__Genius 16290 points

Hi Charlie,

Thank you for reaching out. Is it so that customer requires only one voltage rail (0.9V)? usually PMICs are used where multiple voltage rail requirements exists.

What is the end application? Are they using AWRxxx (radar MCUs) ?

Best regards,

Ishtiaque Panhwarn

0 Charlie Xiao over 2 years ago in reply to Ishtiaque Panhwar

TI__Expert 7305 points

Hi Ishtiaque,

Thanks for your support.

The powered device is a switch control chip, and the ripple is required to be no greater than 2mV. LV products may have large ripple.

Therefore, I am wondering whether the PMIC's products can provide an output ripple of less than 2mV. For example, the ripple of one-phase output of LP8764-Q1 is 3mV, so the ripple of four-phase interleaved parallel output may be less than 2mV, right? But the current rating of LP8764-Q1 is too high.

Therefore, is there any PMIC product can provide a 0.9V output with a ripple less than 2mV?

Regards,

Charlie

0 Charlie Xiao over 2 years ago in reply to Charlie Xiao

TI__Expert 7305 points

Hi Ishtiaque,

Maybe I can choose SR-LV device to meet customer requirements. Thanks

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1203148/lmz30604-please-recommend-an-ic-with-low-output-ripple/4537925#4537925

Regards,

Charlie

+1 Ishtiaque Panhwar over 2 years ago in reply to Charlie Xiao

TI__Genius 16290 points

Hi Charlie,

Yes, I guess so because PMIC doesn't seem to be a good application here as the requirement is only on voltage rail. So, it is good look for the discrete solution as you just mentioned.

Best regards,

Ishtiaque Panhwar

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LP876242-Q1: Please recommend an IC with low output ripple