LM3502SQX-16

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: SQX-16 (16-pin small outline package)

Essence: The LM3502SQX-16 is a voltage regulator IC that provides a stable output voltage regardless of input voltage fluctuations. It is commonly used in electronic devices to ensure a consistent power supply.

Packaging/Quantity: The LM3502SQX-16 is typically sold in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

The LM3502SQX-16 has the following specifications:

• Input Voltage Range: 2.5V to 6V
• Output Voltage Range: 1.2V to 5.5V
• Dropout Voltage: 200mV at 100mA
• Output Current: Up to 500mA
• Quiescent Current: 75µA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM3502SQX-16 has 16 pins arranged as follows:

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| | | 1 16| | | | 2 15| | | | 3 14| | | | 4 13| | | | 5 12| | | | 6 11| | | | 7 10| | | | 8 9| |___________| ```

Functional Features

• Low Dropout Voltage: The LM3502SQX-16 has 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, the LM3502SQX-16 can power a wide range of electronic devices.
• Adjustable Output Voltage: The output voltage can be adjusted within the range of 1.2V to 5.5V, providing flexibility for different applications.
• Thermal Shutdown Protection: The IC includes thermal shutdown protection, which prevents damage due to excessive heat.
• Short-Circuit Current Limit: The LM3502SQX-16 has built-in short-circuit current limiting to protect the device and the connected circuitry.

Advantages and Disadvantages

Advantages: - Low dropout voltage ensures efficient regulation - High output current capability for powering various devices - Adjustable output voltage provides flexibility - Thermal shutdown protection prevents overheating - Short-circuit current limit protects the device and circuitry

Disadvantages: - Limited input voltage range (2.5V to 6V) - Quiescent current of 75µA may not be suitable for ultra-low power applications

Working Principles

The LM3502SQX-16 operates as a linear voltage regulator. It uses a feedback mechanism to compare the output voltage with a reference voltage and adjusts the internal circuitry to maintain a stable output voltage. The dropout voltage is minimized by using a low resistance pass transistor.

Detailed Application Field Plans

The LM3502SQX-16 can be used in various applications, including but not limited to: - Battery-powered devices - Portable electronics - Automotive electronics - Industrial control systems - Communication equipment

Detailed and Complete Alternative Models

Some alternative models to the LM3502SQX-16 that offer similar functionality are: - LM317: Adjustable voltage regulator with higher input voltage range - LM1117: Fixed voltage regulator with low dropout voltage - LT1763: Low noise, high PSRR voltage regulator

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

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