TLVH431

低电压可调节精密并联稳压器

The 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 1.24 V and 18 V with two external resistors see . These devices operate from a lower voltage 1.24 V than the widely used TL431 and TL1431 shunt-regulator references.

When used with an optocoupler, the TLVH431 and TLVH432 devices are ideal voltage references in isolated feedback circuits for 3-V to 3.3-V switching-mode power supplies. They have a typical output impedance of 0.25 Ω. 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.

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Low-Voltage Operation: Down to 1.24 V

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Reference Voltage Tolerances at 25°C

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0.5% for B Grade

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1% for A Grade

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1.5% for Standard Grade

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Adjustable Output Voltage, VO = VREF to 18 V

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Wide Operating Cathode Current Range: 100 µA to 70 mA

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0.25-Ω Typical Output Impedance

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–40°C to +125°C Specifications

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TLVH432 Provides Alternative Pinouts for SOT-23-3 and SOT-89 Packages

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Ultra-Small SC-70 Package Offers 40% Smaller Footprint than SOT-23-3