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PSU design

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Makaram

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Hey guys,
Having a few problems with my 12v to 3.3v buck psu.
Basically when connected up Im getting continuity when testing between 3.3v and GND when test with volt-meter.
So I then measure Ohms which returns 2.2k ohms between v+ and gnd?!!? Is this because of the schottky diode? Is it something to do with my dc-dc converter?

Buck is TL2575-12

Thanks for any insight you can provide
 
Hey guys,
Having a few problems with my 12v to 3.3v buck psu.
Basically when connected up Im getting continuity when testing between 3.3v and GND when test with volt-meter.
So I then measure Ohms which returns 2.2k ohms between v+ and gnd?!!? Is this because of the schottky diode? Is it something to do with my dc-dc converter?

Buck is TL2575-12

Thanks for any insight you can provide
If in fact you are using the TL2575-12, your circuit is not working because the regulator is designed for 12V out from an approximately 25 volts in. If you want 3.3V out you need to use the -3.3 regulator.
 
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