RT9198-30GU5

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Low dropout voltage - High output current capability - Adjustable output voltage - Thermal shutdown protection - Overcurrent protection

Package: SOT-23-5

Essence: The RT9198-30GU5 is a voltage regulator IC that provides a stable output voltage with low dropout. It is commonly used in various electronic devices to regulate and stabilize the voltage supply.

Packaging/Quantity: The RT9198-30GU5 is available in a SOT-23-5 package, which is a small surface-mount package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 2.5V - 6V
• Output Voltage Range: 1.2V - 5.5V
• Dropout Voltage: 300mV at 300mA
• Output Current: Up to 300mA
• Quiescent Current: 50µA
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The RT9198-30GU5 has five pins arranged as follows:

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Pin 1: Enable (EN) - Controls the operation of the voltage regulator. Connects to logic high (Vcc) to enable the device.

Pin 2: Ground (GND) - Connected to the ground reference of the circuit.

Pin 3: Feedback (FB) - Provides feedback for regulating the output voltage. Connects to an external resistor divider network.

Pin 4: Output (OUT) - Supplies the regulated output voltage.

Pin 5: Input (IN) - Receives the input voltage to be regulated.

Functional Features

• Low dropout voltage: The RT9198-30GU5 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 a maximum output current of 300mA, this voltage regulator can power a wide range of electronic components.
• Adjustable output voltage: The output voltage can be adjusted within the specified range using an external resistor divider network.
• Thermal shutdown protection: The IC includes built-in thermal shutdown protection, which prevents damage due to excessive temperature.
• Overcurrent protection: The RT9198-30GU5 incorporates overcurrent protection to safeguard against excessive current flow.

Advantages and Disadvantages

Advantages: - Small package size allows for space-efficient designs. - Wide input voltage range enables compatibility with various power sources. - Low quiescent current minimizes power consumption. - Excellent line and load regulation ensures stable output voltage.

Disadvantages: - Limited output current may not be suitable for high-power applications. - Requires external components (resistor divider) for adjustable output voltage.

Working Principles

The RT9198-30GU5 operates as a linear voltage regulator. It uses a pass transistor to control the output voltage based on the feedback received from the FB pin. When the input voltage exceeds the desired output voltage, the pass transistor adjusts its resistance to maintain a constant output voltage. The enable pin (EN) controls the operation of the voltage regulator, allowing it to be turned on or off as needed.

Detailed Application Field Plans

The RT9198-30GU5 is widely used in various electronic devices that require a stable and regulated power supply. Some common application fields include:

1. Mobile devices: Smartphones, tablets, and portable media players often utilize the RT9198-30GU5 to regulate the voltage for powering the internal circuitry.

2. IoT devices: Internet of Things (IoT) devices, such as sensors and wireless modules, benefit from the RT9198-30GU5's low dropout voltage and small package size.

3. Automotive electronics: The IC finds application in automotive systems, including infotainment systems, navigation units, and engine control modules.

4. Industrial equipment: The RT9198-30GU5 is suitable for various industrial applications, such as control systems, motor drives, and power management units.

Detailed and Complete Alternative Models

1. LM1117-3.3: A popular alternative with similar specifications and pin configuration.
2. MCP1700-3302E: Another voltage regulator IC offering comparable performance.
3. LP2985-33DBVR: Provides a fixed 3.3V output voltage and comes in a SOT-23 package.

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

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