TLVH431AQDBVRQ1集成电路（IC）的电压基准规格书PDF中文资料

TLVH431AQDBVRQ1属于集成电路（IC）的电压基准。由美国德州仪器公司制造生产的TLVH431AQDBVRQ1电压基准产品属于基准电压源系列，可通过相对较不稳定的电源提供稳定的电势，电压值始终保持恒定，以便在测量、控制和类似应用中用作比较的标准。其功能行为可能与用于大功率调节的线性稳压器相似，但基准电压源器件却不适合用于此类用途。用作比较标准时，若输出电流容量或实际负载电流增大，其性能通常会降低。

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.