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 response time and very low output impedance. The Superpower has an error amplifier with 1500V/µsec slew rate and an output impedance so low that it's difficult to measure because it is comparable to the impedance of the wire connected to it.

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

Load Regulation, 1.2 amp pulse (bottom), output dynamic response (top)

Load Regulation - 1.2 amp transient

Above illustrates the delivery of 1.2 Amperes of load current (9.6V across 8 Ohms) in less than 5µsec (lower trace). The upper trace is the transient response of the output voltage; at 5mV per division you see 0V DC shift, illustrating the low output impedance. The transient spike for the negative going edge recovers in approximately 5µsec, and about 20µsec for the positive going edge. No thermal tail, no ringing, no ripple, just fast, clean, flat output.

This is an extremely demanding test, something required by digital circuits. For circuits such as audio or microphone preamps, this performance is far beyond what should ever be required.


ANNOUNCING!

Superpower High Current Belleson® has introduced a small form factor, high output current Superpower™ regulator. The new SPJ78 and SPJ17 devices are available with Vout of +3.3V, +5V and +6.25V, at current to 2 amps. Order the standard 3.3V or 5V positive Superpower and you will get this new part with the same low noise, great dynamics, amazing line and load regulation with 4 times more current and a size that fits your 7805 TO-220 socket!

Use the Superpower regulator in...