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TL431MFKB Datasheet(PDF) 1 Page - Texas Instruments |
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TL431MFKB Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 74 page  Vref Input VKA IKA Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TL431, TL431A, TL431B TL432, TL432A, TL432B SLVS543O – AUGUST 2004 – REVISED JANUARY 2015 TL43xx Precision Programmable Reference 1 Features 3 Description The TL431 and TL432 devices are three-terminal 1 • Reference Voltage Tolerance at 25°C adjustable shunt regulators, with specified thermal – 0.5% (B Grade) stability over applicable automotive, commercial, and – 1% (A Grade) military temperature ranges. The output voltage can be set to any value between Vref (approximately – 2% (Standard Grade) 2.5 V) and 36 V, with two external resistors. These • Adjustable Output Voltage: Vref to 36 V devices have a typical output impedance of 0.2 Ω. • Operation From −40°C to 125°C Active output circuitry provides a very sharp turn-on characteristic, making these devices excellent • Typical Temperature Drift (TL431B) replacements for Zener diodes in many applications, – 6 mV (C Temp) such as onboard regulation, adjustable power – 14 mV (I Temp, Q Temp) supplies, and switching power supplies. The TL432 • Low Output Noise device has exactly the same functionality and electrical specifications as the TL431 device, but has • 0.2- Ω Typical Output Impedance different pinouts for the DBV, DBZ, and PK packages. • Sink-Current Capability: 1 mA to 100 mA Both the TL431 and TL432 devices are offered in • three grades, with initial tolerances (at 25°C) of 0.5%, 2 Applications 1%, and 2%, for the B, A, and standard grade, • Adjustable Voltage and Current Referencing respectively. In addition, low output drift versus temperature ensures good stability over the entire • Secondary Side Regulation in Flyback SMPSs temperature range. • Zener Replacement The TL43xxC devices are characterized for operation • Voltage Monitoring from 0°C to 70°C, the TL43xxI devices are • Comparator with Integrated Reference characterized for operation from –40°C to 85°C, and the TL43xxQ devices are characterized for operation from –40°C to 125°C. Device Information(1) PART NUMBER PACKAGE (PIN) BODY SIZE (NOM) SOT-23-3 (3) 2.90 mm x 1.30 mm SOT-23-5 (5) 2.90 mm x 1.60 mm TL43xx SOIC (8) 4.90 mm x 3.90 mm PDIP (8) 9.50 mm x 6.35 mm SOP (8) 6.20 mm x 5.30 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. 4 Simplified Schematic 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
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