TLVH431A-Q1_V01中文資料德州儀器數(shù)據(jù)手冊PDF規(guī)格書

FEATURES

? 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.