KA431AZ Programmable Shunt Regulator

The KA431AZ is three-terminal adjustable regulator with a guaranteed thermal stability over the operating temperature range. The output voltage can be set to any value between V_REF (approximately 2.5 V) and 36 V with two external resistors. These devices have a typical dynamic output impedance of 0.2 Ω. Active output circuitry provides a sharp turn-on characteristic, making these devices excellent replacements for Zener diodes in many applications.

Features KA431AZ Programmable Shunt Regulator

• Programmable Output Voltage to 36 V

• Low Dynamic Output Impedance: 0.2 Ω (Typical)

• Sink Current Capability: 1.0 to 100 mA

• Equivalent Full-Range Temperature Coefficient of 50 ppm/°C (Typical)

• Temperature Compensated for Operation Over Full Rated Operating Temperature Range

• Low Output Noise Voltage

• Fast Turn-on Response

• VKA Cathode Voltage 37 V

• IKA Cathode Current Range (Continuous) -100 to +150 mA

• IREF Reference Input Current Range -0.05 to +10 mA

• PD Power Dissipation
       TO-92, 8-SOIC Packages 770 mW

• RθjA Thermal Resistance, Junction to Ambient
       TO-92, 8-SOIC Packages 160 °C/W

• TOPR Operating Temperature Range -25 to +85 °C

• TJ Junction Temperature 150 °C

• TSTG Storage Temperature Range -65 to +150 °C