KA431SLMF2TF

Product Overview

Category

The KA431SLMF2TF belongs to the category of voltage references.

Use

It is commonly used as a precision shunt regulator in various electronic circuits.

Characteristics

• Voltage reference accuracy: ±1%
• Temperature stability: 50 ppm/°C
• Low dynamic output impedance: 0.2 Ω
• Operating temperature range: -40°C to +85°C

Package

The KA431SLMF2TF comes in a small SOT-23 package, which is suitable for surface mount applications.

Essence

This product serves as a stable voltage reference, providing a precise and constant voltage output.

Packaging/Quantity

The KA431SLMF2TF is typically packaged in reels, with 3000 units per reel.

Specifications

• Reference voltage: 2.5 V
• Minimum operating current: 80 µA
• Maximum operating current: 150 mA
• Cathode current range: 1 mA to 100 mA
• Dropout voltage: 1.5 V (typical)

Detailed Pin Configuration

The KA431SLMF2TF has three pins:

1. Anode (A): Connected to the positive supply voltage.
2. Cathode (K): Connected to the load or ground.
3. Reference (R): Provides the stable voltage reference output.

Functional Features

• Precise voltage regulation: The KA431SLMF2TF ensures a stable output voltage regardless of input variations.
• Adjustable output: By connecting external resistors, the output voltage can be adjusted to meet specific requirements.
• Low power consumption: The device operates with low quiescent current, making it suitable for battery-powered applications.
• Short-circuit protection: The KA431SLMF2TF includes built-in protection against short-circuits, preventing damage to the device.

Advantages and Disadvantages

Advantages

• High accuracy and stability
• Wide operating temperature range
• Small package size for space-constrained applications
• Low dynamic output impedance for improved performance

Disadvantages

• Limited maximum cathode current range
• Dropout voltage may affect certain low-voltage applications

Working Principles

The KA431SLMF2TF operates based on the principle of a shunt regulator. It compares the reference voltage at the Reference pin with the voltage across a resistor connected to the Cathode pin. By adjusting the current flowing through the resistor, it maintains a constant voltage drop across it, thereby regulating the output voltage.

Detailed Application Field Plans

The KA431SLMF2TF finds applications in various fields, including:

1. Power supplies: It is used as a voltage reference in linear power supply circuits.
2. Battery chargers: The device ensures accurate voltage regulation during battery charging processes.
3. Audio amplifiers: It provides stable biasing voltages for audio amplifier circuits.
4. Industrial control systems: The KA431SLMF2TF is employed in control systems that require precise voltage references.

Detailed and Complete Alternative Models

Some alternative models to the KA431SLMF2TF include:

1. TL431: A widely used adjustable precision shunt regulator.
2. LM4040: A series of precision voltage references available in different voltage options.
3. REF3030: A low-power, high-precision voltage reference suitable for portable devices.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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