ATL431LI High-Bandwidth, Low IQ Programmable Shunt Regulator

Texas Instruments' ATL431LI device is a three-terminal adjustable shunt regulator with specified thermal stability over applicable automotive, commercial, and military temperature ranges. The output voltage can be set to any value between V_REF (approximately 2.5 V) and 36 V, with two external resistors. This regulator has a typical output impedance of 0.3 Ω. Active output circuitry provides an ultra-sharp turn-on characteristic, making these devices excellent replacements for Zener diodes in many applications such as onboard regulation, adjustable power supplies, and switching power supplies. This device is a pin-to-pin alternative to the TL431LI and TL432LI, with a lower minimum operating current to help reduce system power consumption. The ATL432LI and the ATL431LI have the same functionality and electrical specifications, except the ATL432LI has a different pinout for the DBZ package. The ATL431LI is offered in a tiny X2SON (1.00 mm x 1.00 mm) package which makes it ideal for space-constraint applications.

The ATL431LI device is offered in B grade and A grade with initial tolerances of 0.5% and 1% (at +25°C), respectively. The low output drift versus temperature ensures good stability over the entire temperature range. The ATL43xLIxQ devices are characterized for the operating temperature range of -40°C to +125°C.