TLV711: What is the MAX output CAP?

user6376681

Prodigy 100 points

Part Number: TLV711
Other Parts Discussed in Thread: TLV751, TLV755P

I can not find this value on the datasheet. In my design, TLV711 is msut able to drive more than 50uF.

over 5 years ago

0 JCHK over 5 years ago

TI__Guru 50050 points

HI,

I can't find any details on a maximum output capacitor. In general, for stability more than 50uF should be OK, but my key concerns would be inrush into the load. This could cause a non-monotonic rise and possibly some drop on the input rail.

We do have the TLV751 which has a recommended maximum output capacitor of 220uF. This might be a better choice if you need a very large output capacitance.

I hope this answers your question.

0 user6376681 over 5 years ago in reply to JCHK

Prodigy 100 points

The LDO should be able to output 1.8V and 2.9V(2.85V). For TLV751, the P/N seems to be TLV751180290(TLV751180285). But I can not find them anywhere.

This is a space senstive project. Dual output LDO with fixed version is best choice.

0 JCHK over 5 years ago in reply to user6376681

TI__Guru 50050 points

Hi,

At the moment we only have the 1.8/2.8V fixed released https://www.ti.com/store/ti/en/p/product/?p=TLV751180280PDSQR

Can you share the application needing 1.8 and 2.85V?

Thanks,

0 user6376681 over 5 years ago in reply to JCHK

Prodigy 100 points

2.85V is acceptable, but 2.8V is refused.

2.85V is the minimum power rail requirement on the spec of target chip need to be powered by LDO.

0 JCHK over 5 years ago in reply to user6376681

TI__Guru 50050 points

Based on that the TLV711 is probably your best choice. Do you need help in ordering an EVM to see how it behaves when you have more the 50uF at the output?

0 user6376681 over 5 years ago in reply to JCHK

Prodigy 100 points

I will move to TLV755P as new 1.8V/2.9V solution. This will occupy more space, but worth to try.

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TLV711: What is the MAX output CAP?