TLVH431AQDBVRQ1.A中文资料德州仪器数据手册PDF规格书

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.