The TL431LI-Q1
/ TL432LI-Q1 are pin-to-pin alternatives to TL431-Q1 / TL432-Q1. TL43xLI-Q1 offers better
stability, lower temperature drift (VI(dev)), and lower reference current (Iref) for improved
system accuracy.The TL431-Q1 is a three-pin adjustable shunt regulator with specified thermal stability
over applicable automotive temperature ranges. The output voltage can be set to any value from
VREF (approximately 2.5 V) to 36 V, with two external resistors (see Figure
28). This device has a typical output impedance of 0.2 Ω. Active output circuitry provides a sharp
turnon characteristic, making this device an excellent replacement for Zener diodes in many
applications, such as onboard regulation, adjustable power supplies, and switching power
supplies.The TL432-Q1 has exactly the same functionality and electrical specifications as the
TL431-Q1 device, but has a different pinout for the DBZ package.
