Amazing load regulation thanks to fast response time and low output impedance

A perfect regulator maintains a horizontal line of voltage versus time, no matter what kind of load transients occur. The only way to do that is with very fast loop response and very low output impedance. Superpower has an error amplifier operating at 90MHz bandwidth and an output impedance of single milliΩs.

The best way to illustrate output impedance is with a current step as seen here...

Load Regulation, 1 amp pulse (bottom), output step response (top)

Load Regulation - 1 amp step

The lower trace in the above oscillogram shows a 50mA to 1 Ampere load current step, 0.1V across 0.1Ω, that steps and settles in less than 5µsec. The upper trace is the transient response of the output voltage; at 20mV per division you see about 8mV DC shift. At 1A this represents 8mΩ of resistance in the measurement path. The transient for both the positive and negative going edges recovers in about 5µsec.

The measurement was done using a high speed (300MHz) pull-down transistor through a 0.1Ω power resistor to regulator Vout. A 100uF electrolytic capacitor was used on Vout to prevent ringing.

This is an extremely demanding test, something required by digital circuits, so Superpower is a great regulator for DAC and ADC clocks. For circuits such as audio or microphone preamps, this performance is far beyond what is normally required. It's also beyond the performance of other regulators, as you can see in our dynamic performance comparison page.


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The Industry Standard SPX

Order now from our store.

  • 5V to 30V output
  • World's lowest output impedance
  • Superb ripple rejection (135dBV)
  • Instant step response
  • Extreme low noise
  • TO-220 footprint
  • No thermal pad needed!

High Voltage!

Tube lovers—SPHV is BACK!

  • Variable output 5V to 450V
  • Up to 500mA output current
  • Super low 0.5V drop-out at 100mA
  • Small TO-220 footprint!
  • Low output impedance
  • Fast response
  • Low noise

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SPHP—1000 Watts for your music server!

SPHP, a 10A Superpower with adjustable output voltage from 5V to 100V

  • Same low noise
  • Same blazing step response
  • Same great ripple rejection.
Just lots more current and much higher output voltage. For sale on our order page See more information in the data sheet here.

Build a power supply

A PCB and parts list for building a compact dual positive or positive+negative power supply are on this new page.

Transformer Calculator!

Use the Belleson Transformer Calculator to calculate the minimum Vrms voltage of a transformer for your Superpower based supplies.

It's Official

We're proud to announce the U.S. Patent and Trademark Office has granted patent 8,294,440 to the Superpower design.

Use the Superpower regulator in...

  • Headphone amps
  • DACs
  • Buffers
  • Clocks and reclockers
  • Preamps
  • Microphone preamps
  • Phono stages
  • Phono motors
  • Tube preamps and input stages
  • Line powered guitar effects boxes
  • Anywhere an extremely clean, quiet, dynamic power source is needed