LM3502SQX-25

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 - Reverse battery protection

Package: SQ (Small Outline) Package

Essence: The LM3502SQX-25 is a voltage regulator IC that provides a regulated output voltage with low dropout. It is designed to be used in various electronic devices where a stable and reliable power supply is required.

Packaging/Quantity: The LM3502SQX-25 is available in a small outline package, which ensures easy integration into circuit boards. It is typically sold in reels or tubes containing a specific quantity of ICs.

Specifications

• Input Voltage Range: 2.5V to 6.5V
• Output Voltage Range: 1.2V to 5.5V
• Dropout Voltage: 200mV (typical)
• Output Current: Up to 500mA
• Quiescent Current: 75µA (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM3502SQX-25 has the following pin configuration:

```

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| | --| Vout | --| Vin | --| GND | --| EN | |___________| ```

• Vout: Output Voltage
• Vin: Input Voltage
• GND: Ground
• EN: Enable Pin (used to turn the regulator on/off)

Functional Features

• Low dropout voltage ensures efficient power conversion even when the input voltage is close to the desired output voltage.
• High output current capability allows the LM3502SQX-25 to power a wide range of electronic components.
• Adjustable output voltage provides flexibility in meeting different system requirements.
• Thermal shutdown protection prevents the IC from overheating and damaging itself or other components.
• Short-circuit current limit protects the IC and connected devices from excessive current flow during a short circuit.
• Reverse battery protection safeguards the IC against reverse polarity connection.

Advantages and Disadvantages

Advantages: - Low dropout voltage ensures efficient power conversion. - High output current capability allows for versatile applications. - Adjustable output voltage provides flexibility. - Thermal shutdown protection prevents damage due to overheating. - Short-circuit current limit protects against excessive current flow. - Reverse battery protection enhances reliability.

Disadvantages: - Limited input voltage range (2.5V to 6.5V). - Dropout voltage may cause some power loss.

Working Principles

The LM3502SQX-25 is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It operates by comparing the reference voltage with the feedback voltage, adjusting the pass transistor's resistance to maintain a stable output voltage. The enable pin controls the on/off state of the regulator.

Detailed Application Field Plans

The LM3502SQX-25 can be used in various applications, including but not limited to: 1. Battery-powered devices 2. Portable electronics 3. IoT (Internet of Things) devices 4. Automotive electronics 5. Industrial control systems

Detailed and Complete Alternative Models

1. LM317: Adjustable Voltage Regulator
2. LM1117: Low Dropout Voltage Regulator
3. LT1083: Linear Regulator with High Output Current
4. TPS7A47: Ultra-Low Dropout Voltage Regulator
5. MAX603: Low-Power Voltage Reference

These alternative models offer similar functionality and can be considered as alternatives to the LM3502SQX-25 based on specific requirements and application scenarios.

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