The TL431CSF is a three-terminal programmable shunt regulator diode packaged in a compact SOT-23 surface-mount form factor. Renowned for its thermal stability, this integrated circuit functions effectively as a low-temperature coefficient Zener diode.

It allows for programmable output voltage ranges from 2.5V to 36V using two external resistors. Due to its sharp turn-on characteristics and low dynamic output impedance, the TL431 is an excellent replacement for Zener diodes in various applications, including onboard switching power supplies, adjustable voltage sources, and LED drivers.

This SOT-23 version is ideal for space-constrained PCB designs and modern electronics projects requiring precision voltage regulation.

Features:

• Programmable Output: Output voltage adjustable from Vref (approx. 2.5V) to 36V.

• Current Sink Capability: High current sink capability ranging from 1mA to 100mA.

• Precision: Typical reference voltage tolerance of 0.5% to 2%.

• Stability: Low output noise and excellent temperature stability.

• Compact Design: SOT-23 (Surface Mount) package for high-density mounting.

• Application: Ideal for Voltage Monitoring, Current Limiting, and Switching Power Supplies.

Specifications:

• Model: TL431CSF

• Package Type: SOT-23-3 (SMD)

• Cathode Voltage (Vka): Up to 36V

• Cathode Current (Ik): 1mA to 100mA

• Reference Input Voltage: 2.495V (Typical)

• Operating Temperature: -40°C to +85°C

• Dynamic Impedance: 0.22 Ω (Typical)

Package Includes:

• 1 x TL431CSF Adjustable Precision Shunt Regulator (SOT-23)