RT9819B-18GV

Product Overview

Category

RT9819B-18GV belongs to the category of voltage regulators.

Use

It is primarily used for regulating voltage in electronic circuits.

Characteristics

• High precision voltage regulation
• Low dropout voltage
• Wide input voltage range
• Thermal shutdown protection
• Short circuit current limit

Package

RT9819B-18GV is available in a compact SOT-23 package.

Essence

The essence of RT9819B-18GV lies in its ability to provide stable and regulated voltage output, ensuring reliable operation of electronic devices.

Packaging/Quantity

This product is typically packaged in reels containing a specific quantity of units, usually 3000 pieces per reel.

Specifications

• Input Voltage Range: 2.5V - 6V
• Output Voltage: 1.8V
• Dropout Voltage: 200mV @ 100mA
• Quiescent Current: 50µA
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

RT9819B-18GV has three pins:

1. VIN (Pin 1): Input voltage pin
2. GND (Pin 2): Ground pin
3. VOUT (Pin 3): Output voltage pin

Functional Features

• High Precision Regulation: The RT9819B-18GV ensures precise voltage regulation, maintaining a stable output even under varying load conditions.
• Low Dropout Voltage: With a low dropout voltage of only 200mV at 100mA, this regulator minimizes power dissipation and maximizes efficiency.
• Wide Input Voltage Range: It can accept input voltages ranging from 2.5V to 6V, making it suitable for various applications.
• Thermal Shutdown Protection: The device incorporates thermal shutdown protection, preventing damage due to excessive temperature.
• Short Circuit Current Limit: RT9819B-18GV features a short circuit current limit, safeguarding the circuit from potential damage.

Advantages and Disadvantages

Advantages

• High precision voltage regulation ensures stable output.
• Low dropout voltage minimizes power dissipation.
• Wide input voltage range allows for versatile applications.
• Thermal shutdown protection prevents overheating.
• Short circuit current limit protects the circuit.

Disadvantages

• Limited output voltage options (only 1.8V in this model).
• SOT-23 package may require additional space on the PCB.

Working Principles

RT9819B-18GV operates based on the principle of feedback control. It compares the output voltage with a reference voltage and adjusts the internal circuitry to maintain a constant output voltage. By continuously monitoring the load conditions, it compensates for any fluctuations and provides a stable regulated output.

Detailed Application Field Plans

RT9819B-18GV finds application in various electronic devices and systems, including but not limited to: - Mobile phones - Tablets - Portable media players - Battery-powered devices - IoT devices - Wearable electronics

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to RT9819B-18GV include: - LM1117-1.8V: A popular linear voltage regulator with a fixed 1.8V output. - MCP1700-1802E: Another low dropout voltage regulator with a 1.8V fixed output. - TS2940CZ-1.8: A 1.8V voltage regulator with low quiescent current and thermal shutdown protection.

These alternatives can be considered based on specific requirements and design constraints.

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