RT9018B-12GSP

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Low dropout voltage - High output current capability - Wide input voltage range - Thermal shutdown protection - Short-circuit current limit - Overcurrent protection - Adjustable output voltage - Small package size

Package: SOT-223

Essence: The RT9018B-12GSP is a voltage regulator IC that provides a stable output voltage for various electronic devices.

Packaging/Quantity: The RT9018B-12GSP is typically sold in reels or tubes, with a quantity of 2500 units per reel.

Specifications

• Input Voltage Range: 2.5V to 5.5V
• Output Voltage Range: 1.2V
• Dropout Voltage: 300mV at 300mA
• Output Current: Up to 600mA
• Quiescent Current: 75μA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The RT9018B-12GSP has the following pin configuration:

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| | --| VIN GND |-- Pin 1: Ground --| VOUT EN |-- Pin 2: Enable --| FB NC |-- Pin 3: No Connection --| NC NC |-- Pin 4: No Connection --| NC NC |-- Pin 5: No Connection --| NC NC |-- Pin 6: No Connection --| NC NC |-- Pin 7: No Connection --| NC NC |-- Pin 8: No Connection |___________| ```

Functional Features

• Low Dropout Voltage: The RT9018B-12GSP 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 an output current capability of up to 600mA, this voltage regulator can power a wide range of electronic devices.
• Wide Input Voltage Range: The IC can accept input voltages ranging from 2.5V to 5.5V, making it suitable for various applications.
• Thermal Shutdown Protection: The RT9018B-12GSP includes thermal shutdown protection, which prevents the IC from overheating and damaging itself or other components.
• Short-Circuit Current Limit: In case of a short circuit, the IC limits the current to protect itself and the connected devices.
• Overcurrent Protection: The voltage regulator has built-in overcurrent protection, safeguarding against excessive current flow.
• Adjustable Output Voltage: The output voltage can be adjusted using external resistors, providing flexibility in different applications.
• Small Package Size: The SOT-223 package ensures a compact form factor, making it suitable for space-constrained designs.

Advantages and Disadvantages

Advantages: - Low dropout voltage ensures efficient regulation - High output current capability for powering various devices - Wide input voltage range allows versatility - Thermal shutdown protection prevents overheating - Short-circuit current limit protects the IC and connected devices - Overcurrent protection safeguards against excessive current flow - Adjustable output voltage provides flexibility - Small package size enables compact designs

Disadvantages: - Limited output voltage options (only adjustable to 1.2V)

Working Principles

The RT9018B-12GSP operates as a linear voltage regulator. It takes an input voltage within the specified range and regulates it to a stable output voltage of 1.2V. The IC achieves this by using a pass transistor that adjusts the voltage drop across it to maintain the desired output voltage. Feedback mechanisms, such as the FB pin, help control and stabilize the output voltage.

Detailed Application Field Plans

The RT9018B-12GSP is commonly used in various applications, including but not limited to: - Battery-powered devices - Portable electronics - IoT devices - Consumer electronics - Embedded systems - Communication equipment - Automotive electronics

Detailed and Complete Alternative Models

Some alternative models to the RT9018B-12GSP include: - LM1117-3.3: A 3.3V linear voltage regulator with similar characteristics and package size. - XC6206P332MR: A 3.3V low dropout voltage regulator in a SOT-23 package. - AP2112K-3.3TRG1: A 3.3V adjustable linear regulator in a SOT-23 package.

These alternative models offer different output voltages and package options, providing flexibility for specific application requirements.

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