NJM78L20UA-TE1

Product Overview

Category

The NJM78L20UA-TE1 belongs to the category of voltage regulators.

Use

It is primarily used for regulating voltage in electronic circuits.

Characteristics

• Low dropout voltage
• High ripple rejection
• Short circuit protection
• Thermal shutdown protection

Package

The NJM78L20UA-TE1 comes in a small outline package (SOP) with three pins.

Essence

The essence of this product lies in its ability to provide stable and regulated voltage output.

Packaging/Quantity

The NJM78L20UA-TE1 is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Input Voltage Range: 7V to 35V
• Output Voltage: 20V
• Output Current: 100mA
• Dropout Voltage: 2V (max)
• Ripple Rejection: 60dB (typ)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

1. INPUT: This pin is connected to the input voltage source.
2. GROUND: This pin is connected to the ground reference.
3. OUTPUT: This pin provides the regulated output voltage.

Functional Features

• Low Dropout Voltage: The NJM78L20UA-TE1 has a low dropout voltage, allowing it to regulate voltage even when the input voltage is close to the desired output voltage.
• High Ripple Rejection: It exhibits high ripple rejection, minimizing the impact of AC voltage fluctuations on the output.
• Short Circuit Protection: The device incorporates short circuit protection, safeguarding against damage caused by excessive current flow.
• Thermal Shutdown Protection: It includes thermal shutdown protection, preventing overheating and potential damage to the device.

Advantages and Disadvantages

Advantages

• Provides stable and regulated voltage output.
• Compact package size.
• Offers short circuit and thermal protection.

Disadvantages

• Limited output current capacity (100mA).
• Requires an input voltage range of 7V to 35V.

Working Principles

The NJM78L20UA-TE1 operates based on the principle of linear voltage regulation. It utilizes a series pass transistor to regulate the output voltage by adjusting the current flow through it. The device compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a constant output voltage.

Detailed Application Field Plans

The NJM78L20UA-TE1 finds applications in various electronic circuits where a stable and regulated voltage supply is required. Some common application fields include:

1. Power supply units for microcontrollers and other digital ICs.
2. Battery-powered devices requiring regulated voltage.
3. Automotive electronics, such as dashboard displays and audio systems.
4. Industrial control systems and automation equipment.
5. Consumer electronics, including televisions, audio amplifiers, and DVD players.

Detailed and Complete Alternative Models

1. LM7805: A popular alternative with a fixed 5V output voltage.
2. LT1084: Offers higher output current capability and adjustable output voltage.
3. MC78M12: Provides a fixed 12V output voltage.

These alternative models offer similar functionality but may have different specifications or package sizes. It is important to select the appropriate model based on specific requirements and constraints.

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