Superpower compared to Burson
NOTE: This page has not been updated for lower noise Superpower
How does Belleson Superpower compare with Burson Regulator regulator? We compare to the Burson Low Noise regulator shown here. The Burson is a production unit purchased from Parts Connexion, which also sells Belleson regulators. Both devices were tested using identical conditions, both using the same input supply and Vout = 9V for both regulators. After reading this comparison, please believe that we did our best to give this regulator an honest evaluation and this is what we measured. We even traced the schematic and ran simulations to see if we got a bad device, but simulation results were like the measurements.
The Burson regulator is not self–powered and, based on the output dynamics, is not much better than a LM78 type monolithic regulator. You can make your own conclusions from the oscillograms.
The Burson regulator has the lowest ripple rejection of all frequencies we could measure. The input circuit was not able to process 5KHz input ripple so we could not measure at that frequency. The maligned LM7805 offers much better ripple rejection across the audio spectrum.
Ripple rejection (PSRR) of 4 regulators, lower values are better. The graph shows the magnitude of Vout(AC) given a Vin of 12V(DC) + 0.5Vpp(AC). Vout(DC)=9V for all regulators except the LM7805, which is of course 5V out. Regulators were all equally loaded with a 220Ω resistor (54mA DC load).
SPJ78 PSRR at 5KHz
Belleson SPJ78 regulator PSRR AC output with ½Vac(pp) input ripple at 5KHz riding on 12Vdc. Peak of fundamental is -95dB. Click the graph for a clear full size spectrum image.