RT9018B-18GQW

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 protection

Package: QFN-16 (Quad Flat No-Lead)

Essence: The RT9018B-18GQW is a voltage regulator IC designed to provide a stable output voltage from a variable input voltage source.

Packaging/Quantity: The RT9018B-18GQW is typically sold in reels containing 2500 units per reel.

Specifications

• Input Voltage Range: 2.5V - 5.5V
• Output Voltage: 1.8V
• Dropout Voltage: 200mV @ 300mA
• Output Current: Up to 600mA
• Quiescent Current: 75μA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The RT9018B-18GQW has a total of 16 pins, which are assigned as follows:

1. EN (Enable)
2. GND (Ground)
3. FB (Feedback)
4. VOUT (Output Voltage)
5. VIN (Input Voltage)
6. NC (No Connection)
7. NC
8. NC
9. NC
10. NC
11. NC
12. NC
13. NC
14. NC
15. NC
16. NC

Functional Features

• Low Dropout Voltage: The RT9018B-18GQW exhibits 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 600mA, the RT9018B-18GQW 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-18GQW incorporates thermal shutdown protection, which prevents the IC from overheating and ensures its safe operation.
• Short Circuit Protection: In the event of a short circuit, the IC automatically shuts down to protect itself and the connected components.

Advantages and Disadvantages

Advantages: - Low dropout voltage ensures efficient regulation - High output current capability for powering demanding devices - Wide input voltage range provides flexibility in different applications - Thermal shutdown and short circuit protection enhance reliability

Disadvantages: - Limited pin configuration options due to the fixed pin assignment - May require additional external components for specific applications

Working Principles

The RT9018B-18GQW operates as a linear voltage regulator. It regulates the output voltage by comparing the feedback voltage (FB pin) with a reference voltage. Any difference between the two voltages is amplified and used to adjust the pass transistor, ensuring a stable output voltage.

Detailed Application Field Plans

The RT9018B-18GQW finds applications in various fields, including but not limited to: 1. Portable electronic devices 2. Battery-powered systems 3. IoT devices 4. Automotive electronics 5. Industrial control systems

Detailed and Complete Alternative Models

1. LM1117-1.8V: A popular alternative with similar specifications and pin configuration.
2. MCP1700-1802E/TO: Another alternative offering low dropout voltage and high output current capability.
3. LP2985-1.8: An alternative with a slightly lower output current but wider input voltage range.

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

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