With the rapid development of science and technology in the information age, industrial equipment and electronic products are showing trends of intelligence, sharing, and high integration, which put forward higher requirements for chip performance, adaptability, reliability, and safety.
The AWS73431 shunt voltage reference series launched by AWINIC includes two products: AWS73431BESTR and AWS73431AESTR. The differences between them can be interpreted through the product sequence shown in Picture 1. Within the applicable temperature range, both products can meet the specified thermal stability requirements.
The AWS73431 can set the output voltage to any value between VREF (2.495V) and 36V through two external resistors, with a typical output impedance of 0.2Ω. The active output circuit of this product has significant conduction characteristics, so it is very suitable for replacing Zener diodes in many application scenarios, such as board-level regulators, adjustable power supplies, switching power supplies, server power supplies, industrial AC/DC power supplies, AC inverters, variable frequency drives, and power adapters.
Picture 1 Interpretation of Product Series
AWS73431 Product Features
■Reference voltage accuracy at 25℃
■AWS73431BESTR: 0.5% (B)
■AWS73431AESTR: 0.8% (A)
■Adjustable output voltage: VREF ~ 36V
■Typical temperature drift: 5mV
■Sink current capability: 1mA ~ 100mA
■0.2Ω typical output impedance
■High stability under capacitive load
■Low output noise
■Operating temperature range: -40°C ~ 125°C
01 High-precision reference voltage
The AWS73431 integrates a 2.495V precision reference source, with a low temperature drift of 20ppm/℃ and excellent stability across the full temperature range. It can replace traditional Zener diodes and improve system accuracy.
02 Wide range of adjustable outputs
The AWS73431 can freely set the output voltage in the range of 2.495V to 36V through external voltage divider resistors, meeting different circuit requirements.
03 Fast dynamic response and low power consumption
The AWS73431 has an output impedance of only 0.2Ω and a response time as short as microseconds, making it particularly suitable for transient scenarios such as switching power supplies. The quiescent current is as low as 0.2mA, contributing to low-power design.
04 Miniaturized package and strong compatibility
The AWS73431 adopts a miniaturized surface-mount package SOT23-3L, with a compact size and moderate pin spacing. It balances welding convenience and layout density, reducing PCB wiring crosstalk.
Picture 2 AWS73431 Package
Main Application Scenarios of AWS73431
■Board-level regulators
■Adjustable power supplies
■Switching power supplies
■Server power supplies
■Industrial AC/DC power supplies
■AC inverters
■Variable frequency drives
■Power adapters
Shunt Reference Selection Table
Series Reference Selection Table
AWINIC has excellent performance in the field of integrated circuit design, and its chip products are widely used and well recognized. It is reported that AWINIC will launch the SOT23-5L package version of this series of products in the future. The SOT23-5L package has a small size and excellent electrical performance, which can meet the requirements of equipment miniaturization and high performance, and has high flexibility in circuit board design. Let's look forward to the surprises brought by the new products.
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