RT9166A-12GGL

Product Overview

Category: Voltage Regulator
Use: Power management
Characteristics: High efficiency, low dropout voltage, small package size
Package: SOT-223
Essence: Linear regulator
Packaging/Quantity: Tape and reel, 3000 units per reel

Specifications

• Input Voltage Range: 2.5V to 6V
• Output Voltage: 1.2V
• Output Current: 1.5A
• Dropout Voltage: 250mV at 1A
• Line Regulation: ±0.2%
• Load Regulation: ±0.4%
• Quiescent Current: 80μA
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The RT9166A-12GGL 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

• Low dropout voltage: The RT9166A-12GGL exhibits a low dropout voltage of only 250mV at 1A output current, ensuring efficient power delivery.
• High efficiency: With its linear regulator design, the device achieves high efficiency in power conversion.
• Thermal shutdown protection: The regulator includes built-in thermal shutdown protection to prevent damage due to excessive temperature.
• Short-circuit protection: It features short-circuit protection, safeguarding the device and connected components from potential damage.

Advantages and Disadvantages

Advantages: - Small package size: The SOT-223 package allows for compact designs, making it suitable for space-constrained applications. - Low quiescent current: The RT9166A-12GGL has a low quiescent current of 80μA, minimizing power consumption in standby mode. - Wide operating temperature range: It can operate reliably in a wide temperature range from -40°C to +85°C.

Disadvantages: - Limited output current: The device is designed for applications requiring up to 1.5A output current. Higher current demands may require an alternative solution. - Linear regulation: As a linear regulator, it dissipates excess power as heat, resulting in lower efficiency compared to switching regulators.

Working Principles

The RT9166A-12GGL is a linear voltage regulator that maintains a constant output voltage despite variations in input voltage and load conditions. It achieves this by using a pass transistor to regulate the output voltage based on a feedback mechanism. When the input voltage exceeds the desired output voltage, the pass transistor adjusts its resistance to maintain a stable output. Conversely, if the input voltage drops below the desired output voltage, the pass transistor increases its resistance to compensate and provide a consistent output.

Detailed Application Field Plans

The RT9166A-12GGL finds applications in various fields, including:

1. Battery-powered devices: It is suitable for portable electronic devices powered by batteries, such as smartphones, tablets, and portable media players.
2. Industrial equipment: The regulator can be used in industrial control systems, sensors, and other equipment requiring stable power supply.
3. Automotive electronics: It is applicable in automotive applications, including infotainment systems, navigation devices, and lighting control modules.
4. Communication systems: The device can be utilized in communication infrastructure equipment, routers, switches, and wireless access points.

Detailed and Complete Alternative Models

1. LM1117-3.3: A popular alternative with similar specifications and package options.
2. LT1763: Offers higher output current capability and lower dropout voltage.
3. ADP3339: Provides adjustable output voltage and higher accuracy.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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