FEATURES - Unconditionally Stable. - Precision Reference Voltage. AIC431 :2.495V ±0.5% TL431A :2.495V ±1.0% TL431 :2.495V ±1.6% - Sink Current Capability: 200mA. - Minimum Cathode Current for Regulation: 250mA. - Equivalent Full-Range Temperature Coefficient: 50 ppm/°C. - Fast Turn-On Response. - Low Dynamic Output Impedance: 0.08W. - Adjustable Output Voltage. - Low Output Noise. - Space Saving SOT-89, SOT-23, TO-92 and SO8 packages.
n DESCRIPTION The AIC431/TL431A/TL431 are 3-terminal a d- justable precision shunt regulators with guar- anteed temperature stability over the applica- ble extended commercial temperature range. The output voltage may be set at any level greater than 2.495V (VREF) up to 30V merely by selecting two external resistors that act as a voltage divider network. These devices have a typical output impedance of 0.08W. Active output circuitry provides a very sharp turn-on characteristics, making these devices excel- lent improved replacements for zener diodes in many applications. The precise ±0.5% reference voltage toler- ance of the AIC431 makes it possible in many applications to avoid the use of a vari- able resistor, consequently saving cost and eliminating drift and reliability problems asso- ciated with it.
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