[TowerTalk] 12V transient/noise filtering?

[Richard (Rick) Karlquist]

I would point out that the LT3045-1 has provisions built
into it to combine multiple instances of the chip to
provide max current that is a multiple of 500 mA.
The scheme avoids wasting significant power in so called
"OR'ing" resistors (that force equal current sharing)
by running all chips from a common reference voltage,
which you can't do with ordinary voltage regulators.

The LT3045-1 has a very high PSRR bandwidth so you probably
don't need any filter inductors.

As was pointed out, it's not for every application, but
it does have some nice features.

Rick N6RK



On 5/12/2021 12:54 AM, Michael Tope wrote:
> Jim, how much current capability do you need?
> 
> On 5/11/2021 9:47 AM, Lux, Jim wrote:
>> I'm looking for an off the shelf transient/noise filter for 12V (yeah, 
>> 14.4 or 13.8V)
>>
>>
>> The application is that there's motors and relays running off the 12V 
>> bus, which is noisy, but I have stuff needing a cleaner 12V and 5V 
>> (getting 5V from 12V is easy with automotive USB power widgets).
>>
>> Ideally with power pole connectors.
>>
>>
>> I could design something with LC and back to back Zeners, etc. but I 
>> would rather just buy something.
> 
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