Then I stumbled on this one (see attached pdf) MT3608 that runs
at 1.2MHz and will have
3.6/7.2 blips. Tweak it to 1.15 Mhz and this can be avoided.
Raj
On 10/08/2022 6:47 PM, Ashhar Farhan
wrote:
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Neils,
Many of these switching regulators have a 50 KHz
switching frequency. This has images inside the passband of
the audio codec.
I arrived at LM338 only after experimenting with
various switching systems (including building one from
discrete components). These new generation of switchers move
the frequency to 500 KHz. That's what makes them useful.
- f
On Wed, Aug 10, 2022, 6:27 PM
John Terrell <
N6LN@...>
wrote:
The smallest
ones have a small cheap potentiometer which I would not trust
in the long run to maintain a stable output voltage. Some have
a secondary means of choosing between four or five fixed
voltage levels and bypassing the fickle potentiometer by
cutting a pcb trace with a hobby knife. Loupes help. But in
any case a buffer capacitor ought to reduce a noisy output p.