ON Semiconductor LM431CCM Adjustable Precision Zener Shunt Regulator

The ON Semiconductor LM431CCM is a three-terminal adjustable shunt regulator with specified thermal stability over a full operating temperature range. It operates as a precision Zener diode replacement that offers an output voltage which can be set to any value between V<sub>REF (approximately 2.5V) and 36 volts by selecting two external resistors. These devices are available in three different tolerance levels, with the LM431CCM variant providing a tolerance of ±2%.

The LM431CCM is housed in a compact SOIC-8 package, making it suitable for space-constrained applications. This regulator features a low dynamic output impedance, providing better output voltage stability. The low output impedance along with the fast turn-on response makes this device excellent for use in voltage regulation applications, especially where fast response to load changes is required.

Key features of the LM431CCM include:

• Adjustable output voltage from 2.5V to 36V
• Low dynamic output impedance
• Sink current capability from 1mA to 100mA
• Typical output impedance of 0.22 ohms
• Output voltage tolerance of ±2% over the temperature range
• Fast turn-on response

This versatile device is commonly used in a wide range of applications such as power supplies, battery chargers, voltage monitors, and motor control systems. Its ability to act as a superior replacement for Zener diodes in many applications, including onboard regulation, adjustable power supplies, and switching power supplies, makes it a highly valuable component for designers and engineers.

The LM431CCM's performance is assured for temperatures from -40°C to +85°C, making it reliable for use in a variety of environments. Its robust design ensures long-term stability and high reliability, which is critical for maintaining consistent performance in electronic systems.

For those looking to integrate the LM431CCM into their designs, ON Semiconductor provides comprehensive technical support, including datasheets, reference designs, and application notes, to ensure a smooth design-in process and optimal utilization of this adjustable precision shunt regulator.