Regulator/Boost converter for USB VBUS conditioning (4.4-5.1V in, 5.0V out)

Dav01

Other Parts Discussed in Thread: TPS63036, TPS63030, TPS61099, TPS61240

Hi,

When building bus powered devices with analog/audio functionallity, usually you need to rely on a stable 5.0V for an ADC.

As USB bus power can be anything between 4.4V to 5.1V depending on cable length, hubs in series, etc, I'd like some guidance finding an optimal dc/dc to boost vbus to 5.0V.

It's a bonus if there is some sort of 100% on/pass-through mode if the rail is already above the set output voltage (for best efficiency)

I expect current draw to be as little as <= 20-30mA at most.

Thanks
David

over 5 years ago

0 Milos over 5 years ago

TI__Expert 7925 points

Hi David,

One solution is to use a buck-boost converter which always regulates the output voltage, regardless of the input voltage. You can check the TPS63030 (DFN package) or the TPS63036 (BGA package).

Another solution is a boost converter with automatic bypass, feed-through or LDO mode, such as the TPS61099. I will reach out to the boost converter experts for advice here.

Best regards,
Milos

0 Jasper Li over 5 years ago

TI__Mastermind 46905 points

Hi David,

I would suggest TPS61240

0 Milos over 5 years ago

TI__Expert 7925 points

Hi David,

Have you checked the recommended devices? Please let us know if you need any help.

Best regards,
Milos

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Regulator/Boost converter for USB VBUS conditioning (4.4-5.1V in, 5.0V out)