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TLVH431ACDBVT Datasheet(PDF) 1 Page - Texas Instruments |
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TLVH431ACDBVT Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 54 page  TLVH431, TLVH432 Low-Voltage Adjustable Precision Shunt Regulators 1 Features • Low-voltage operation: down to 1.24V • Reference voltage tolerances at 25°C – 0.5% for B grade – 1% for A grade – 1.5% for standard grade • Adjustable output voltage, VO = VREF to 18V • Wide operating cathode current range: 100μA to 70mA • 0.25Ω typical output impedance • –40°C to +125°C specifications • TLVH432 provides alternative pinouts for SOT-23-3 and SOT-89 packages • Ultra-small SC-70 package offers 40% smaller footprint than SOT-23-3 2 Applications • Adjustable voltage reference for data Converters • Secondary side regulation in flyback SMPSs • Zener replacement with low leakage current • Voltage monitoring for power rails • Comparator with integrated reference 3 Description The TLVH431 and TLVH432 devices are low- voltage 3-terminal adjustable voltage references, with specified thermal stability over applicable industrial and commercial temperature ranges. Output voltage can be set to any value between VREF (1.24V) and 18V with two external resistors (see Figure 6-2). These devices operate from a lower voltage (1.24V) than the widely used TL431 and TL1431 shunt-regulator references. When used with an optocoupler, the TLVH431 and TLVH432 devices are an excellent choice for voltage references in isolated feedback circuits for 3V to 3.3V switching-mode power supplies. The devices have a typical output impedance of 0.25Ω. Active output circuitry provides a very sharp turn-on characteristic, making the TLVH431 and TLVH432 devices excellent replacements for low-voltage Zener diodes in many applications, including on-board regulation and adjustable power supplies. The TLVH432 device is identical to the TLVH431 device, but is offered with different pinouts for the 3-pin SOT-23 and SOT-89 packages. Device Information PART NUMBER PACKAGE (1) BODY SIZE (NOM) (2) TLVH43xxDBV SOT-23 (5) 2.90mm × 1.60mm TLVH43xxDBZ SOT-23 (3) 2.92mm × 1.30mm TLVH43xxDCK SC70 (6) 2.00mm × 1.25mm TLVH43xxLP TO-92 (3) 4.30mm × 4.30mm TLVH43xxPK SOT-89 (3) 4.50mm × 2.50mm (1) For all available packages, see the orderable addendum at the end of the data sheet. (2) The package size (length × width) is a nominal value and includes pins, where applicable. VREF Input V I O K Simplified Schematic TLVH431, TLVH431A, TLVH431B, TLVH432, TLVH432A, TLVH432B SLVS555N – NOVEMBER 2004 – REVISED JUNE 2024 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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