TL431IDBVRE4

Product Overview

• Category: Integrated Circuit
• Use: Voltage Reference
• Characteristics: Adjustable Precision Shunt Regulator
• Package: SOT-23 (3-Lead)
• Essence: TL431IDBVRE4 is a voltage reference integrated circuit that provides adjustable precision shunt regulation. It is commonly used in various electronic circuits to maintain a stable voltage reference.
• Packaging/Quantity: TL431IDBVRE4 is typically packaged in reels, with 3000 units per reel.

Specifications

• Reference Voltage Range: 2.495V to 36V
• Operating Temperature Range: -40°C to +85°C
• Output Current: Up to 100mA
• Reference Voltage Tolerance: ±1%
• Cathode Current: 1mA to 100mA
• Anode Current: 1mA to 150mA

Detailed Pin Configuration

TL431IDBVRE4 has three leads:

1. Anode (A): This pin is connected to the anode of the internal reference zener diode.
2. Cathode (K): This pin is connected to the cathode of the internal reference zener diode and is also the output terminal.
3. Reference (R): This pin is connected to the base of the internal transistor and is used to set the desired reference voltage.

Functional Features

• Adjustable Output Voltage: TL431IDBVRE4 allows for precise adjustment of the output voltage by using an external resistor divider network.
• Low Output Impedance: The device exhibits low output impedance, making it suitable for applications requiring stable voltage references.
• Wide Operating Voltage Range: TL431IDBVRE4 can operate within a wide range of input voltages, making it versatile for various applications.
• High Accuracy: The integrated circuit provides a high level of accuracy in maintaining the reference voltage.

Advantages and Disadvantages

Advantages: - Precise voltage regulation - Adjustable output voltage - Low output impedance - Wide operating voltage range - High accuracy

Disadvantages: - Limited output current capacity (up to 100mA) - Requires an external resistor divider network for voltage adjustment

Working Principles

TL431IDBVRE4 operates based on the principle of shunt regulation. It compares the reference voltage at the Reference (R) pin with the voltage across the external resistor divider network connected between the Anode (A) and Cathode (K) pins. By adjusting the resistance values in the divider network, the desired output voltage can be set. The internal transistor acts as a variable resistor, regulating the current flow through the cathode terminal to maintain the reference voltage.

Detailed Application Field Plans

TL431IDBVRE4 finds applications in various electronic circuits where precise voltage references are required. Some common application fields include:

1. Power Supplies: TL431IDBVRE4 is used in power supply circuits to provide stable voltage references for accurate regulation.
2. Battery Charging: It is employed in battery charging circuits to maintain a constant voltage during the charging process.
3. Audio Amplifiers: TL431IDBVRE4 can be utilized in audio amplifier circuits to ensure consistent biasing voltages.
4. Voltage Monitoring: It is used in voltage monitoring circuits to trigger actions when the voltage exceeds or falls below a certain threshold.

Detailed and Complete Alternative Models

Some alternative models that serve similar functions to TL431IDBVRE4 include:

1. LM4040: Precision Micropower Shunt Voltage Reference
2. LT1236: Precision Reference
3. MAX6001: Low-Power, Precision Voltage Reference
4. REF02: Precision Voltage Reference

These alternative models offer comparable features and can be used as substitutes in various applications.

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