L4964

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Low dropout voltage - High output current capability - Adjustable output voltage - Thermal shutdown protection - Short-circuit protection

Package: TO-220

Essence: The L4964 is a voltage regulator IC that provides a stable output voltage with low dropout. It is commonly used in electronic devices to regulate and maintain a constant voltage level.

Packaging/Quantity: The L4964 is typically sold in a TO-220 package, which is a widely used package type for power semiconductors. The quantity per package may vary depending on the supplier.

Specifications

• Input Voltage Range: 4.5V to 40V
• Output Voltage Range: 1.2V to 37V
• Output Current: Up to 1.5A
• Dropout Voltage: 0.6V (typical)
• Quiescent Current: 10mA (typical)
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The L4964 IC has the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. VOUT: Output voltage pin
4. ADJ: Adjustable pin for setting the output voltage

Functional Features

• Low Dropout Voltage: The L4964 has a low dropout voltage, allowing it to regulate the output voltage even when the input voltage is close to the desired output voltage.
• High Output Current Capability: With a maximum output current of 1.5A, the L4964 can handle high current loads.
• Adjustable Output Voltage: The output voltage can be adjusted using an external resistor connected to the ADJ pin.
• Thermal Shutdown Protection: The IC includes a thermal shutdown feature that protects it from overheating.
• Short-Circuit Protection: The L4964 has built-in short-circuit protection to prevent damage in case of a short circuit.

Advantages and Disadvantages

Advantages: - Low dropout voltage ensures efficient regulation - High output current capability for demanding applications - Adjustable output voltage provides flexibility - Thermal shutdown and short-circuit protection enhance reliability

Disadvantages: - Limited input voltage range (4.5V to 40V) - Quiescent current of 10mA may be relatively high for low-power applications

Working Principles

The L4964 is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the output voltage with a reference voltage and adjusting the pass transistor accordingly to maintain a stable output voltage. The adjustable pin allows the user to set the desired output voltage within the specified range.

Detailed Application Field Plans

The L4964 can be used in various applications where a stable and regulated voltage supply is required. Some common application fields include:

1. Power Supply Units (PSUs): The L4964 can be used in PSUs to provide a regulated voltage output for powering electronic devices.
2. Automotive Electronics: It can be utilized in automotive electronics to regulate voltage levels for various components such as sensors, actuators, and control modules.
3. Industrial Control Systems: The IC can be employed in industrial control systems to ensure stable voltage supply for control circuits and sensors.
4. Battery-Powered Devices: The L4964 can be used in battery-powered devices to regulate the voltage from the battery and maintain a constant voltage level.

Detailed and Complete Alternative Models

Some alternative models to the L4964 that offer similar functionality are:

1. LM317: A popular adjustable voltage regulator IC with a wide input voltage range and adjustable output voltage.
2. LT1083: A high-current, adjustable linear regulator with low dropout voltage and thermal shutdown protection.
3. LM7805: A fixed-output voltage regulator that provides a stable 5V output with low dropout voltage.

These alternative models can be considered based on specific requirements and application needs.

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