RT9043GB

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 - Short circuit protection

Package: SOT-23-5

Essence: The RT9043GB is a voltage regulator IC that provides a stable output voltage for various electronic devices.

Packaging/Quantity: The RT9043GB is available in tape and reel packaging, with 3000 units per reel.

Specifications

• Input Voltage Range: 2.5V to 5.5V
• Output Voltage Range: 1.2V to 3.6V
• Dropout Voltage: 200mV at 300mA
• Output Current: Up to 300mA
• Quiescent Current: 60μA
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The RT9043GB has the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. EN: Enable pin (active high)
4. FB: Feedback pin for adjusting the output voltage
5. VOUT: Output voltage pin

Functional Features

• Low dropout voltage ensures efficient power conversion.
• High output current capability allows for powering a wide range of devices.
• Adjustable output voltage enables customization for specific applications.
• Thermal shutdown protection prevents overheating of the IC.
• Overcurrent protection safeguards against excessive current flow.
• Short circuit protection prevents damage in case of a short circuit.

Advantages and Disadvantages

Advantages: - Compact SOT-23-5 package for space-constrained designs. - Wide input voltage range for compatibility with different power sources. - Low quiescent current for power-saving applications. - Excellent line and load regulation for stable output voltage.

Disadvantages: - Limited output current compared to higher-power regulators. - Requires external components for proper operation.

Working Principles

The RT9043GB is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the feedback voltage (FB) with a reference voltage, adjusting the pass transistor's resistance to maintain a stable output voltage. The enable pin (EN) controls the regulator's on/off state.

Detailed Application Field Plans

The RT9043GB is commonly used in various electronic devices that require a stable and adjustable voltage supply. Some typical application fields include:

1. Mobile devices: Smartphones, tablets, portable media players.
2. Wireless communication systems: Wi-Fi modules, Bluetooth devices.
3. Battery-powered devices: Portable gaming consoles, digital cameras.
4. Industrial equipment: Sensors, control systems, measurement devices.
5. Automotive electronics: Infotainment systems, navigation units.

Detailed and Complete Alternative Models

1. RT9018GB: Similar voltage regulator IC with a lower dropout voltage.
2. RT9050GB: Higher-output current version of the RT9043GB.
3. RT9025GB: Fixed output voltage version of the RT9043GB.

These alternative models offer similar functionality and can be considered as substitutes for the RT9043GB in specific applications.

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