RT9198-25GU5

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 RT9198-25GU5 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 RT9198-25GU5 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: 200mV @ 300mA
• Output Current: Up to 300mA
• Quiescent Current: 85µA
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The RT9198-25GU5 has five pins arranged as follows:

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Pin 1: Enable (EN) - Controls the operation of the regulator. Connects to ground to enable the device.

Pin 2: Feedback (FB) - Provides feedback for regulating the output voltage. Connects to an external resistor divider network.

Pin 3: Ground (GND) - Connected to the ground reference of the system.

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

Pin 5: Input (IN) - Connects to the input voltage source.

Functional Features

• Low dropout voltage: The RT9198-25GU5 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, the IC can power a wide range of electronic components.
• Adjustable output voltage: The output voltage can be adjusted within the specified range by using an external resistor divider network.
• Thermal shutdown protection: The IC includes thermal shutdown protection, which prevents damage due to excessive temperature.
• Overcurrent protection: The RT9198-25GU5 incorporates overcurrent protection to safeguard against excessive current flow.

Advantages and Disadvantages

Advantages: - Stable output voltage regulation - Compact SOT-23-5 package - Wide operating temperature range - Low quiescent current

Disadvantages: - Limited maximum output current compared to some other voltage regulators - Requires external resistor divider for adjustable output voltage

Working Principles

The RT9198-25GU5 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 stable output voltage. The enable pin (EN) allows the user to control the operation of the regulator.

Detailed Application Field Plans

The RT9198-25GU5 is widely used in various applications that require a stable and regulated voltage supply. Some common application fields include:

1. Battery-powered devices: The IC can be used in portable electronic devices such as smartphones, tablets, and wearable devices to regulate the battery voltage and ensure stable operation.

2. Industrial automation: It finds applications in industrial automation systems where precise and stable voltage regulation is required for sensors, actuators, and control circuits.

3. Automotive electronics: The RT9198-25GU5 can be utilized in automotive electronics for voltage regulation in various subsystems, including infotainment systems, lighting controls, and engine management.

4. IoT devices: It is suitable for powering IoT (Internet of Things) devices that require a stable power supply for sensors, communication modules, and microcontrollers.

Detailed and Complete Alternative Models

1. LM1117-3.3: A popular alternative with similar specifications and package type.
2. MCP1700-3302E: Another alternative with comparable characteristics and package options.
3. TS2950CT-3.3: An alternative option offering low dropout voltage and adjustable output voltage.

These alternative models provide similar functionality and can be considered as substitutes for the RT9198-25GU5 in various applications.

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