The LM431AIZX is a precision adjustable shunt regulator manufactured by Fairchild Semiconductor (now ON Semiconductor). It is a three-terminal adjustable shunt regulator offering excellent temperature stability and output regulation. The device can be programmed to any voltage between Vref (2.5V) and 36V with two external resistors. This makes it versatile for use in a variety of voltage regulation and reference applications.

Applications

• Adjustable voltage references
• Switching power supplies
• Overvoltage protection circuits
• Linear regulators
• Voltage monitors

Features

• Programmable output voltage
• Low dynamic output impedance
• Sink current capability from 1 mA to 100 mA
• Typical temperature stability of 6 mV (over full rated operating temperature range)
• Low output noise
• Fast turn-on response

Benefits

• Adjustable output voltage: Provides flexibility to set the desired output voltage using external resistors.
• High precision: Ensures accurate and stable voltage regulation.
• Low output impedance: Provides excellent load regulation.
• Wide operating current range: Suitable for a variety of applications with different current requirements.
• Good temperature stability: Maintains stable performance over a wide temperature range.

Technical Specifications

The LM431AIZX has a reference voltage (Vref) of 2.5V. The output voltage can be adjusted from 2.5V to 36V. The sink current capability ranges from 1 mA to 100 mA. The device operates over a temperature range of -40°C to +85°C. It is available in various packages, including TO-92 and SOIC.

The device's low dynamic output impedance ensures excellent load regulation, minimizing voltage variations under changing load conditions. The fast turn-on response makes it suitable for applications requiring quick voltage stabilization. The LM431AIZX is a reliable and versatile shunt regulator for a wide range of voltage regulation and reference applications.