csdave
Member level 5
hi all,
I was planning to use an LM2940 to power a 5V circuit off a 6V transformer. However, the datasheet says that the ESR of the output cap is critical (page 13 of **broken link removed**) and suggests using a tantalum cap or combining an aluminum and a tantalum cap for this purpose.
I have a few 0.1uF tantalum caps at home, so I was thinking my best solution would be to parallel three of these.
The thing is that the supply will be powering among other things a relay core. The relay has a 1N4004 in anti-parallel as a flyback.
Is this flyback enough to prevent reverse polarity, or should I worry about my tantalum caps exploding?
I was planning to use an LM2940 to power a 5V circuit off a 6V transformer. However, the datasheet says that the ESR of the output cap is critical (page 13 of **broken link removed**) and suggests using a tantalum cap or combining an aluminum and a tantalum cap for this purpose.
I have a few 0.1uF tantalum caps at home, so I was thinking my best solution would be to parallel three of these.
The thing is that the supply will be powering among other things a relay core. The relay has a 1N4004 in anti-parallel as a flyback.
Is this flyback enough to prevent reverse polarity, or should I worry about my tantalum caps exploding?