Innovative CircuitsAmazing 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)
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.
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.