AL5809-25S1-7

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 limiting - Reverse battery protection

Package: SOT-23-5

Essence: The AL5809-25S1-7 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 maintain a constant voltage level.

Packaging/Quantity: The AL5809-25S1-7 is typically packaged in reels or tubes, containing a specific quantity of ICs per package. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Input Voltage Range: 2.5V - 6.5V
• Output Voltage Range: 1.2V - 5.5V
• Dropout Voltage: 200mV (typical)
• Output Current: Up to 500mA
• Quiescent Current: 50µA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The AL5809-25S1-7 has a standard SOT-23-5 package with the following pin configuration:

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Pin 1: Enable (EN) Pin 2: Ground (GND) Pin 3: Feedback (FB) Pin 4: Output (OUT) Pin 5: Input (IN)

Functional Features

• Low Dropout Voltage: The AL5809-25S1-7 exhibits a low dropout voltage, ensuring efficient regulation 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 a wide range of applications that require higher current levels.
• Adjustable Output Voltage: The output voltage can be adjusted within the specified range using an external resistor divider network connected to the feedback pin (FB).
• Thermal Shutdown Protection: The IC incorporates thermal shutdown protection, which prevents damage due to excessive temperature by disabling the output when the junction temperature exceeds a certain threshold.
• Short-Circuit Current Limiting: In case of a short circuit at the output, the AL5809-25S1-7 limits the current to protect itself and the connected components.
• Reverse Battery Protection: The IC includes reverse battery protection, safeguarding against accidental reverse polarity connection.

Advantages and Disadvantages

Advantages: - Low dropout voltage ensures efficient regulation - High output current capability for various applications - Adjustable output voltage provides flexibility - Thermal shutdown protection prevents overheating - Short-circuit current limiting protects the IC and connected components - Reverse battery protection avoids damage from reverse polarity connection

Disadvantages: - None identified

Working Principles

The AL5809-25S1-7 operates as a linear voltage regulator. It regulates the output voltage by comparing the feedback voltage (FB) with a reference voltage. The internal circuitry adjusts the pass transistor to maintain a stable output voltage, compensating for changes in the input voltage and load conditions.

Detailed Application Field Plans

The AL5809-25S1-7 finds applications in various electronic devices where a stable voltage supply is required. Some common application fields include: - Battery-powered devices - Portable consumer electronics - Industrial control systems - Automotive electronics - Communication equipment

Detailed and Complete Alternative Models

• AL5809-25S1-5: Similar to AL5809-25S1-7, but with a different package (SOT-23-5) and slightly lower dropout voltage.
• AL5809-33S1-7: Provides a fixed output voltage of 3.3V with similar characteristics and features as AL5809-25S1-7.
• AL5809-ADJ: Adjustable output voltage version with wider input and output voltage ranges.

These alternative models offer similar functionality and can be considered based on specific requirements and constraints.

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