TPS61099: Efficiency Values in Down Mode

Nicholas Carley

Part Number: TPS61099

Hello,

I don't see efficiency plots for the device in down mode, do we have any data on this? Is the device more current limited in down mode vs boost mode (ie, is there more self heating to worry about)?

Thanks,
Nick

over 4 years ago

0 Minqiu Xie over 4 years ago

TI__Mastermind 21565 points

Hi Nicholas:

May you share some details information?

What's the input voltage range and output target? And the load during different condition.

0 Nicholas Carley over 4 years ago in reply to Minqiu Xie

TI__Expert 8165 points

Input voltage: 2-3.2V

Output: 2.5V

Typically ~10uA but it has some short loads of 100-300mA

Thanks,
Nick

0 Minqiu Xie over 4 years ago in reply to Nicholas Carley

TI__Mastermind 21565 points

Hi Nick:

When the input voltage is 0.7V higher than Vout, it will entering pass-through mode, and the Vout can't be regulated anymore.

And while Vin=2.5-3.0, the loss calculation is like an LDO, as (Vin-Vout)*Load.(Not really actually, but could estimate like this.)

0 Minqiu Xie over 4 years ago in reply to Minqiu Xie

TI__Mastermind 21565 points

Hi Nick:

How is it going? I'll close the thread as I assumes you had solved the issue. if not, just reply below.

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TPS61099: Efficiency Values in Down Mode