AN27 ZR431 Application Note:  Zetec Semiconductors  Applications Notes An introduction to some of  many applications of  versatile ZR431 shunt regulator. Particular emphasis is given to  advantages apparent when employing  Zetex version of this popular part.   (app note added 2/06)

Make Your Own Shunts:  Using a modern multimeter to measure current can sometimes be difficult.  Many of these meters will only measure up to one amp.  However, may 112-volt DC powered projects draw a lot more than that. If you have ever thought of purchasing a commercial shunt to solve the problem, your know just how expensive they can be.  Commercial shunts, while very precise, frequently cost more than the projects they are measuring!  However, there is a better and cheaper alternative that will work perfectly well in most situations... (added 2/06)

MOSFET shunt regulator substitutes for series regulator:  11/25/04   EDN-Design Ideas / (added 5/05)  You would normally use a series linear regulator or a dc/dc converter to obtain 3V dc from a higher supply. However, when breadboarding a concept, you may be able to use a shunt regulator, especially if a series regulator of the correct voltage is unavailable. The MOSFET in Figure 1 can replace a zener diode in a shunt regulator and provide lower output impedance than a zener diode....

Shunt Constant Current Source:  Designed by Andrew R. Morris  (circuit / schematic design added 6/06)

Shunt regulator eases power supply start up woes:  10/27/05 EDN Design Ideas  / (added 11/05)  Ensure regulator start-up under light output load.

Shunt regulator improves power amplifier's current-limit accuracy:  2/2/06  EDN Design Ideas  /  (added 11/06)  Additions protect output transistor and downstream circuitry.

Shunt Regulator Provides overVoltage Protection:  01/15/98 EDN-Design Ideas / (added 09/05) The circuit in Figure 1 uses a typical technique for varying the output voltage of a power supply via a programmable control voltage. Although the topology and schematic details of the power supply are not critical, the protection technique is novel.

Shunt regulator serves as inexpensive op amp in power supplies:  09/15/05  EDN -Design Ideas  /   (added 11/05)   Use low-cost power-regulator IC to replace more costly op amp in power supplies.

Shunt regulator speeds power supply's start-up:  12/16/05  EDN Design Ideas  /  (added 11/06)  Reconfiguring the start-up shunt regulator can reduce bootstrap time.

ZR431 Application Note:  Zetec Semiconductors  Applications Notes An introduction to some of the many applications of the versatile ZR431 shunt regulator. Particular emphasis is given to the advantages apparent when employing the Zetex version of this popular part.   (app note added 2/06)