ELM0431BA2.5V Programable shunt regulator

ELM0431BA is three-terminal adjustable shunt regulator utilizing an accurate 2.5V band-gap reference. The output voltage can be set to any value between 2.5V (Vref) to 29V with two external resistors as shown in the typical application circuit. The device exhibit a wide operating current range of 0.4 to 100 mA with a typical dynamic impedance of 0.25Ω. The characteristics of these reference make it excellent replacements for zener diodes in many applications such as digital voltmeters, power supplies, and op amp circuitry. The 2.5V volt reference makes it convenient to obtain a stable reference from 5.0V logic supplies. ELM0431BA shunt regulator is available in a SOT-23 package.

Low cost solution
Shunt capacity100mA
Output voltage range(adj.)Set up to 29V
Output impedanceTyp.0.25Ω
Trimmed band-gap design1%
Linear regulator
Precision voltage reference
Switch power supplies
Battery operating equipment

Absolute Maximum Ratings

Cathode-Anode reverse breakdown voltageVka30V
Cathode–Anode currentIka100mA
Reference input currentIref10mA
Power dissipation
Pd200 (*1)
500 (*2)
Junction temperatureTj150°C
Operationg temperatureTop-40 to +125°C
Storage temperatureTstg-65 to +150°C
  • * 1. No mounted, IC alone.
    * 2. When mounted on glass epoxy 2-layers PCB (EIJ/JEDEC standard size: 76.2 mm×114.3 mm×1.6 mm), Cu thickness 35 μm, copper foil area ratio 20% on the front side, back side 100% .

Block diagram