1FEATURES
• Qualified for Automotive Applications
• Low-Voltage Operation: Down to 1.24 V
• Reference Voltage Tolerances at 25°C
– 0.5% for B Grade
– 1% for A Grade
• Adjustable Output Voltage, VO = VREF to 18 V
• Wide Operating Cathode Current Range:
100 μA to 70 mA
• 0.25-Ω Typical Output Impedance
• –40°C to 125°C Specifications

DESCRIPTION/ORDERING INFORMATION
The TLVH431 devices are low-voltage 3-terminal adjustable voltage references, with thermal stability specified
over the automotive temperature range. Output voltage can be set to any value between VREF (1.24 V) and 18 V
with two external resistors (see Figure 2). 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 devices are ideal voltage reference 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 an excellent replacement for
low-voltage Zener diodes in many applications, including on-board regulation and adjustable power supplies.