LP38691-ADJ: load transient response for Vout = 5 V

Hitesh Kumar Chandrakar

Part Number: LP38691-ADJ
Other Parts Discussed in Thread: TLV767, LMG1020, TPS7A90

I would like to use LP3869x- ADJ for Vout =5V.

The load transient waveform that is being provided in datasheet is for Vout = 1.25 V, I would be thankful if you could provide the load transient waveform for Vout = 5 V.

Thanks

Hitesh Kumar

over 4 years ago

0 JCHK over 4 years ago

TI__Mastermind 44220 points

Hi Hitesh,

the above plots for line transient are actually for 3.3VOUT. I don't have the line transient data for 5VOUT but as long as the drop-out is about the same, the line transient response should be similar.

Note: we have released the TLV767 which is a much newer device with many improvements. (Sorry Line transient for this also shows 3.3VOUT).

I hope this answers your question.

0 Hitesh Kumar Chandrakar over 4 years ago in reply to JCHK

Prodigy 180 points

Dear JCHK,

Thanks for responding. In the datasheet of TLV767 during the load transient response, the change in output voltage is around -400mV.

Could you please suggest any other LDO regulator, compatible for powering LMG1020, which has better load transient performance.

Thank you

Hitesh Kumar

0 JCHK over 4 years ago in reply to Hitesh Kumar Chandrakar

TI__Mastermind 44220 points

Hi Hitesh,

We have two charts in the datasheet for the TLV767 Load transient:

Increasing COUT can certainly help but if you need truly fast load transient response, a device like the TPS7A90 might be a better choice:

Note: the TPS7A90 recommended maximum input voltage is 6.5V (absolute max is 7V).

Does this work for you?

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LP38691-ADJ: load transient response for Vout = 5 V