LMR14020: Pin + Package compatible and functional (nearly) compatible simple switcher

Michi S

Part Number: LMR14020
Other Parts Discussed in Thread: LMR14030, , LMR14050, LMR16030, LMR16020

Which simple switcher are pin + package compatible with the LMR14020 and functionally (nearly) compatible? (Not the LMR14030, other families...)

For the new application we have to show alternative simple switcher (pin + package + nearly functional compatible) for the LMR14020 to our customer.

over 2 years ago

0 Arief Hernadi over 2 years ago

TI__Mastermind 23825 points

Hi,

If i understand correctly, you have already identified LMR14030 and LMR14050 as pin to pin compatible part.

Another pin to pin compatible part would be LMR16020 and LMR16030 but they are a 60V part vs 40V part.

https://www.ti.com/product/LMR16020

Thanks

-Arief

0 Michi S over 2 years ago in reply to Arief Hernadi

Prodigy 245 points

One feature ist very important, the soft start time by power up.

We need a soft start time with max 1500 µs. It can be fix or adjustable - but max 1500 µs, better 1000 µs.

The LM14020 has an "External Soft-start", adjustable by a capacitor.

0 Michi S over 2 years ago in reply to Michi S

Prodigy 245 points

Important information to our requirement.

A delay between the input voltage and the output voltage is okay and uncritical.

Important is the "output ramp up time" - max 1500 µs are allowed from 0 V to 3,3 V at the output.

0 Arief Hernadi over 2 years ago in reply to Michi S

TI__Mastermind 23825 points

Hi Michi,

I apologize but i dont understand the question. Are you looking for a pin to pin compatible part with LMR14020 with adjustable soft-start time or are you looking for a part that have a soft-start at 1000us?

Thanks

-Arief

0 Michi S over 2 years ago in reply to Arief Hernadi

Prodigy 245 points

I'm looking for a pin to pin compatible part with LMR14020 with adjustable soft-start time.

+1 Arief Hernadi over 2 years ago in reply to Michi S

TI__Mastermind 23825 points

How about LMR16030 which have the PGOOD and soft-start version
https://www.ti.com/lit/ds/symlink/lmr16030.pdf?ts=1644450784008&ref_url=https%253A%252F%252Fwww.google.com%252F#:~:text=The%20LMR16030%20is%20a%2060,power%20conditioning%20from%20unregulated%20sources.

Thanks

-Arief

0 Michi S over 2 years ago in reply to Arief Hernadi

Prodigy 245 points

The LMR16030 with soft start option looks good, seems to be a replacement for the LMR14020.

Are there any other possible switcher parts for the LMR14020?

We should have at least two other possible replacement families.

0 Arief Hernadi over 2 years ago in reply to Michi S

TI__Mastermind 23825 points

Hi Michi,

So far that's the only part that i know.

Thanks

-Arief

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LMR14020: Pin + Package compatible and functional (nearly) compatible simple switcher