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L432VB Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers |
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L432VB Datasheet(HTML) 1 Page - List of Unclassifed Manufacturers |
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1 / 11 page  1 1.24V Low-Voltage Adjustable Precision Shunt Regulator NIKO-SEM L432 NOV-21-2001 GENERAL DESCRIPTION The L432 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 mA with a typical dynamic impedance of 0.25Ω. Active output circuitry provides a very sharp turn-on characteristic, making the L432 excellent re- placements for low-voltage zener diodes in many applications, including on-board regulat- ion and adjustable power supplies. When used with an opto-coupler, the L432 is ideal voltage reference in isolated feedback circuits for 3.3V switching-mode power supplies. The L432 shunt regulator is available in two voltage tolerances (0.5% & 1.0%) and three package options (TO-92, SOT-23-3 and SO-8). FEATURES Internal amplifier with 100 mA capability Programmable output voltage to 18V 0.25Ω typical output impedance Pin to pin compatible with TLV431A, TS431, SC431L & AS432 Trimmed bandgap design 0.5% & 1.0% with three package options Low output noise APPLICATIONS Linear regulator controller Precision voltage reference Switching power supplies Battery operating equipment Instrumentation PCs, Computer disk drives SYMBOL & BLOCK DIAGRAM Anode (A) Cathod Reference - + Cathode (K) Anode (A) Reference (R) 1.24 Vref FUNCTIONAL BLOCK DIAGRAM SYMBOL (R) (K) |
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