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CAT431LEZR-TEAP Datasheet(PDF) 1 Page - Catalyst Semiconductor |
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CAT431LEZR-TEAP Datasheet(HTML) 1 Page - Catalyst Semiconductor |
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1 / 11 page  1 FEATURES s Low startup overshoot s Wide current operation: 40 µA to 100mA s Low temperature coefficient reference: +12mV max deviation over temperature s Accurate 1.24V reference voltage: +0.5% (+6mV) at 25 °°°°°C DESCRIPTION The CAT431L is a low-voltage three-terminal adjustable shunt voltage reference with guaranteed thermal stability over the industrial temperature range. The CAT431L has a lower 1.24V reference and wider operating current range than the widely used TL431 and TL431A shunt-regulator references. Compared to the TLV431/A, the CAT431L 1.24V reference is two times more accurate. CAT431L Low-Voltage Adjustable Precision Voltage Reference - 0.5% Tolerance - SOT23 and TO92 Packages - Low Startup Overshoot s Low dynamic impedance: 0.3 Ω at 1kHz s Compact 3-lead SOT23 package option s Industrial temperature range: -40 °°°°°C to 85°°°°°C s Adjustable output voltage: V REF to 6V © 2003 by Catalyst Semiconductor, Inc. Characteristics subject to change without notice Doc. No. 4006, Rev. J APPLICATIONS s SMPS control loop s Shunt regulator s Low temperature coefficient voltage reference s Current limiting s Over/Under voltage monitor s 3V Off-line switching regulators Minimal overshoot at startup and wide AC bandwidth make the CAT431L easy to apply in a wide set of applications. When used with an opto-coupler, the CAT431L is an ideal voltage reference in isolated feedback circuits for 3V to 3.3V switch-mode power supplies. FUNCTIONAL DIAGRAM + – VREF REF CATHODE ANODE 1.24 REF CATHODE ANODE |
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