TL431CDBZR Adjustable Precision Shunt Regulator – Versatile Voltage Reference

Description

The TL431CDBZR is a three-terminal programmable shunt regulator that functions as a high-precision voltage reference with exceptional thermal stability. Designed to behave like an adjustable Zener diode, its output voltage can be precisely set to any value between the reference voltage (2.5V) and 36V using a simple external resistor-divider network. This level of flexibility makes the TL431 an industry-standard component for a vast range of voltage regulation and reference applications.

Engineered for high performance, the TL431CDBZR offers a sharp turn-on characteristic and extremely low dynamic output impedance, ensuring consistent and stable operation even under varying load and input conditions. Whether you are designing feedback loops for switching power supplies (SMPS), implementing over-voltage protection, or creating adjustable reference circuits, this IC delivers the precision and reliability required for demanding electronic systems. Housed in a compact SOT-23 (SMD-3) package, it is perfect for space-constrained, modern circuit designs.

Key Features

• Programmable Output Voltage: Easily set your desired voltage level between 2.5V and 36V using two external resistors.
• High Precision & Stability: Offers excellent thermal stability and accuracy, ensuring reliable performance across varying temperatures.
• Sharp Turn-on Characteristics: Provides clear and stable regulation, essential for precision timing and power control circuits.
• 100mA Current Handling: Capable of handling up to 100mA, making it suitable for a variety of shunt regulation tasks.
• Compact SOT-23 (SMD-3) Package: A tiny, industry-standard footprint optimized for high-density surface-mount PCB layouts.

Application

• Power Supply Feedback: The preferred choice for secondary-side feedback loops in isolated switching mode power supplies (SMPS).
• Precision Voltage Reference: Provides a steady, adjustable reference voltage for ADCs, DACs, and precision instrumentation.
• Battery Charging Circuits: Used to maintain precise voltage control during the charging cycle for various battery chemistries.
• Voltage Monitoring: Excellent for constructing reliable over-voltage or under-voltage detection and protection circuits.
• Custom Circuitry: A fundamental building block for any project requiring a tunable, high-precision voltage source.

Package Includes

• 1 x TL431CDBZR 36V 100mA Adjustable Precision Shunt Regulator IC (SOT-23)

Technical Specifications

Note: Product images are shown for illustrative purposes only and may differ from the actual product. For complete technical parameters, please refer to the official device datasheet.