AL5809-40S1-7

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Input Voltage Range: 4.5V to 60V - Output Voltage Range: 0.8V to 55V - Output Current: 3A - Efficiency: Up to 95% - Package Type: SOT-223 - Operating Temperature Range: -40°C to +125°C

Package and Quantity: The AL5809-40S1-7 is available in a SOT-223 package. It is typically sold in reels of 2500 units.

Essence: The AL5809-40S1-7 is a high-efficiency voltage regulator IC designed for various applications requiring a stable output voltage.

Specifications

The AL5809-40S1-7 has the following specifications:

• Input Voltage Range: 4.5V to 60V
• Output Voltage Range: 0.8V to 55V
• Output Current: 3A
• Dropout Voltage: 0.6V (typical)
• Quiescent Current: 2.5mA (typical)
• Line Regulation: ±0.05% (typical)
• Load Regulation: ±0.2% (typical)
• Ripple Rejection Ratio: 70dB (typical)
• Switching Frequency: 500kHz (typical)
• Thermal Shutdown Protection: Yes
• Short-Circuit Protection: Yes
• Overcurrent Protection: Yes
• Adjustable Soft-Start: Yes

Pin Configuration

The AL5809-40S1-7 has the following pin configuration:

```

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| | --| VIN GND |-- Pin 1: Ground --| VOUT EN |-- Pin 2: Enable --| FB NC |-- Pin 3: Not Connected --| NC NC |-- Pin 4: Not Connected --| NC NC |-- Pin 5: Not Connected |___________| ```

Functional Features

• Wide input voltage range allows for versatile applications.
• High output current capability of 3A enables powering various loads.
• Adjustable output voltage provides flexibility in different scenarios.
• Excellent line and load regulation ensure stable output under varying conditions.
• High efficiency up to 95% minimizes power dissipation and extends battery life.
• Built-in thermal shutdown, short-circuit, and overcurrent protection enhance system reliability.
• Adjustable soft-start feature prevents excessive inrush current during startup.

Advantages and Disadvantages

Advantages: - Wide input voltage range accommodates diverse power sources. - High output current capability suits a wide range of load requirements. - Excellent efficiency reduces power consumption and heat generation. - Comprehensive protection features enhance system reliability. - Adjustable output voltage and soft-start feature provide flexibility and control.

Disadvantages: - Limited number of available pins may restrict additional functionality. - SOT-223 package may not be suitable for all application layouts. - Higher cost compared to some alternative models.

Working Principles

The AL5809-40S1-7 is a step-down (buck) voltage regulator. It utilizes a switching topology to efficiently convert the input voltage to a lower, regulated output voltage. The internal control circuitry adjusts the duty cycle of the switching transistor to maintain the desired output voltage despite variations in input voltage and load conditions. The feedback pin (FB) is used to set the output voltage by connecting an external resistor divider network. The enable pin (EN) allows for easy on/off control of the regulator.

Application Field Plans

The AL5809-40S1-7 is suitable for a wide range of applications, including but not limited to: - Industrial automation systems - Automotive electronics - Power supplies - LED lighting - Battery-powered devices - Telecommunications equipment

Alternative Models

Some alternative models that offer similar functionality to the AL5809-40S1-7 include: - LM2596: A popular buck converter IC with adjustable output voltage and high efficiency. - LT1763: Low dropout (LDO) regulator with adjustable output voltage and low quiescent current. - TPS5430: High-performance synchronous buck converter with wide input voltage range and adjustable output voltage.

These alternative models can be considered based on specific application requirements and cost considerations.

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