Precision adjustable (programmable) shunt reference

The TL1431 device is a precision programmable

reference with specified thermal stability over automotive, commercial, and military

temperature ranges. The output voltage can be set to any value between

VI(ref) (approximately 2.5V) and 36V with two external resistors (see

Figure 8-3). This device has a typical output impedance of 0.2Ω. Active output circuitry

provides a sharp turnon characteristic, making the device an excellent replacement

for Zener diodes and other types of references in applications such as onboard

regulation, adjustable power supplies, and switching power supplies.

The TL1431C is characterized for operation over the commercial temperature range of 0°C to 70°C. The TL1431Q is characterized for operation over the full automotive temperature range of –40°C to 125°C. The TL1431M is characterized for operation over the full military temperature range of –55°C to 125°C.