TPS54061: Start-up time

Oba

Part Number: TPS54061
Other Parts Discussed in Thread: LMR16006, LMR36510, LMR36520

Hello,

My customer is designing a product with TPS54061 and facing a problem for its start-up time.

Now the start-up time is about 10msec with VOUT=5V and COUT=10uF condition while the datasheet says that TYP start up time is 2.7msec.

When they tested with removing the load, the start-up time became faster. So they think this long start-up time would be due to the current limit at start-up.

Then they have 2 questions.

1. Do we have any pin-to-pin compatible device which current limit is higher than TPS54061?

2. Is there any way to reduce the start-up time?

Regards,

Oba

over 4 years ago

0 Daniel Li14 over 4 years ago

TI__Mastermind 27040 points

Hi:

we don't have P2P device , higher current device we have LMR36510/LMR36520 as new generation or you can use LMR16006.

if you can use a load switch to control the load on and off, keep TPS54061 raise up with no load, it may help on it.

Thanks

0 Oba over 4 years ago in reply to Daniel Li14

TI__Genius 16345 points

Hello,

Thank you very much for your answer.

I understand we don't have any P2P device.

The problem here is that they can't change the board layout from now.
They basically can change only resistance or capacitance values.
Isn't there any way to adjust start-up time?

Regards<
Oba

0 Daniel Li14 over 4 years ago in reply to Oba

TI__Mastermind 27040 points

I don't have good idea to short the start up time with loading on the chip.

Thanks

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TPS54061: Start-up time