L431L Datasheet | NIKO-SEM

Features GENERAL DESCRIPTION The L431L is a three-terminal adjustable shunt regulator utilizing an accurate 1.24V band gap reference. The output voltage can be set to any value between 1.24V (VREF) to 18V with two external resistors as shown in the typical application circuit. The device exhibit a wide operating current range of 0.2 to 100 m A with a typical dynamic impedance of 0.25 Ω . Active output circuitry provides a very sharp turn-on characteristic, making the L431L excellent replacements for low-voltage zener diodes in many applications, including on-board regulation and adjustable power supplies. When used with an opto-coupler, the L431L is ideal voltage reference in isolated feedback circuits for 3.3V switching-mode power supplies. The L431L shunt regulator is available in two voltage tolerances (0.5% & 1.0%) and three package options (TO-92, SOT-23-3 and SO-8). z Internal amplifier with 100 m A capability z Programmable output voltage to 18V z 0.25Ω typical output impedance z Pin to pin patible with TLV431A, TS431, SC431L & AS432 z Trimmed bandgap design 0.5% & 1.0% with three package options z Low output noise APPLICATIONS z Linear regulator controller z Precision voltage reference z Switching power supplies z Battery operating equipment z Instrumentation z PCs, puter disk drives SYMBOL & BLOCK DIAGRAM Cathode (K) Reference (R) + Cathod (K) Reference (R) 1.24 Vref Anode (A) Anode (A) SYMBOL FUNCTIONAL BLOCK DIAGRAM ..net APR-25-2002 NIKO-SEM 1.24V Low-Voltage Adjustable Precision Shunt Regulator ABSOLUTE MAXIMUM RATINGS PARAMETER Cathode-Anode Reverse Breakdown Voltage - VKA Anode-Cathode Forward Current - IAK Operating Cathode Current - IKA Reference Input Current - IREF Storage Temperature Range - TSTG Junction Temperature - TJ Lead Temperature (Soldering, 10 Seconds) - TL Continuous Power at 25 °C - PD TO-92 SOIC-8 SOT-23 VALUE 20V 1A 100 m A 1 m A -65 to +150 °C 150 °C 300 °C 700 m W 650 m W 200 m W REMENDED...