DESCRIPTION
The SC431 is a three terminal adjustable shunt regulator with thermal stability guaranteed over temperature. The output voltage can be adjusted to any value from 2.5V (VREF) to 36V with two external resistors. The SC431 has a typical dynamic output impedance of 0.25Ω. Active output circuitry provides a very sharp turn on characteristic, making the SC431 an excellent replacement for zener diodes.
The SC431 shunt regulator is available in three voltage tolerances (0.5%, 1.0% and 2.0%) and three package options (SOT-23-3, SO-8 and TO-92). The three voltage tolerances allow the designer the opportunity to select the proper cost/tolerance for their application.

FEATURES
• Wide operating current range 100µA to 150mA
• Low dynamic output impedance 0.25 Ω typ.
• Trimmed bandgap design + 0.5%
• Alternate for TL431, LM431 & AS431

APPLICATIONS
• Linear Regulators
• Adjustable Supplies
• Switching Power Supplies
• Battery Operated Computers
• Instrumentation
• Computer Disk Drives