- Thu May 22, 2014 1:44 am
#171357
Hi all,
Due to a sudden change in design requirements with regards my circuit supply voltage I'm looking to change my voltage regulation on my circuit from the classic LM7805 linear voltage regulator to a switching/buck regulator.
This is my first time attempting to use switching regulator so apologies if some bits of my post sound trivial. In saying this I've gone through this http://www.maximintegrated.com/app-note ... vp/id/2031 for the theoretical aspects and understood the basics of how the switching regulator works.
My circuit
My new supply voltage requirement is +24V from +6V and I need a Vout of 5V to be supplied across the circuit. My max current is 0.4Amps. I can't utilise my LM7805 as the heat dissipation is just too much. See calculations based on the calculations below using help from this https://www.sparkfun.com/tutorials/217
Power dissipation = V ×I= (24V−5V) × 0.4A = 19 ×0.4 = 7.6W
7.6W is too much heat.
Hence my question: which switching regulator (possibly available in the eagle libraries) would be suitable to take in a Vin of 24V or below and deliver a Vout of 5.0V?
Any help is appreciated. Thanks.
Due to a sudden change in design requirements with regards my circuit supply voltage I'm looking to change my voltage regulation on my circuit from the classic LM7805 linear voltage regulator to a switching/buck regulator.
This is my first time attempting to use switching regulator so apologies if some bits of my post sound trivial. In saying this I've gone through this http://www.maximintegrated.com/app-note ... vp/id/2031 for the theoretical aspects and understood the basics of how the switching regulator works.
My circuit
My new supply voltage requirement is +24V from +6V and I need a Vout of 5V to be supplied across the circuit. My max current is 0.4Amps. I can't utilise my LM7805 as the heat dissipation is just too much. See calculations based on the calculations below using help from this https://www.sparkfun.com/tutorials/217
Power dissipation = V ×I= (24V−5V) × 0.4A = 19 ×0.4 = 7.6W
7.6W is too much heat.
Hence my question: which switching regulator (possibly available in the eagle libraries) would be suitable to take in a Vin of 24V or below and deliver a Vout of 5.0V?
Any help is appreciated. Thanks.
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