RT9178-2HGB

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Low dropout voltage - High output current capability - Adjustable output voltage - Thermal shutdown protection - Short circuit current limit

Package: SOT-23-5

Essence: The RT9178-2HGB 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 RT9178-2HGB 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

The RT9178-2HGB has the following specifications:

• Input Voltage Range: 2.5V to 6V
• Output Voltage Range: 1.2V to 5.5V
• Dropout Voltage: 200mV at 500mA
• Output Current: Up to 500mA
• Quiescent Current: 75μA
• Line Regulation: 0.05%/V
• Load Regulation: 0.1%/mA
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The RT9178-2HGB has five pins arranged as follows:

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Pin Configuration: 1. VIN: Input voltage pin 2. GND: Ground pin 3. NC: No connection 4. VOUT: Output voltage pin 5. EN: Enable pin

Functional Features

• Low Dropout Voltage: The RT9178-2HGB 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 500mA, this voltage regulator can handle high current demands in various applications.
• Adjustable Output Voltage: The output voltage can be adjusted within the specified range using external resistors, providing flexibility for different voltage requirements.
• Thermal Shutdown Protection: The IC incorporates thermal shutdown protection, which prevents damage due to excessive temperature by shutting down the regulator temporarily.
• Short Circuit Current Limit: The RT9178-2HGB has built-in short circuit current limiting, protecting the device and the connected circuitry from excessive current flow during a short circuit condition.

Advantages and Disadvantages

Advantages: - Low dropout voltage ensures efficient regulation even with low input voltages. - High output current capability allows it to power a wide range of electronic components. - Adjustable output voltage provides versatility for different applications. - Thermal shutdown protection prevents overheating and potential damage. - Short circuit current limit protects the device and connected circuitry.

Disadvantages: - Limited input voltage range (2.5V to 6V) may not be suitable for all applications requiring higher input voltages. - SOT-23-5 package may require surface-mount soldering skills for installation.

Working Principles

The RT9178-2HGB operates as a linear voltage regulator. It uses a pass transistor to regulate the output voltage based on the difference between the input and desired output voltage. The internal circuitry compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a stable output voltage.

Detailed Application Field Plans

The RT9178-2HGB finds applications in various electronic devices that require regulated power supply. Some common application fields include:

1. Mobile Devices: Smartphones, tablets, and portable media players often utilize voltage regulators like the RT9178-2HGB to ensure stable power supply for their internal components.
2. Embedded Systems: Microcontrollers, sensors, and other embedded systems require regulated voltages for reliable operation, making the RT9178-2HGB a suitable choice.
3. Consumer Electronics: Devices such as digital cameras, portable gaming consoles, and audio players benefit from the stable voltage provided by this IC.
4. Automotive Electronics: The RT9178-2HGB can be used in automotive applications where regulated power supply is crucial for various electronic modules.

Detailed and Complete Alternative Models

1. LM1117: A popular alternative with similar specifications and features.
2. MCP1700: Another voltage regulator IC offering low dropout voltage and adjustable output.
3. LT1763: Provides high output current capability and low dropout voltage.

These alternative models offer comparable performance and functionality to the RT9178-2HGB, providing flexibility for different design requirements.

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