LM3502SQX-44

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - High efficiency - Low dropout voltage - Adjustable output voltage - Current limit protection - Thermal shutdown protection

Package: SQX-44

Essence: The LM3502SQX-44 is a voltage regulator IC that provides a stable output voltage with high efficiency and low dropout voltage. It is commonly used in various electronic devices to regulate the voltage supplied to different components.

Packaging/Quantity: The LM3502SQX-44 is available in a SQX-44 package, which refers to a 44-pin small outline integrated circuit package. The quantity of units per package may vary depending on the manufacturer.

Specifications

The LM3502SQX-44 has the following specifications:

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: 0.8V to VIN
• Dropout Voltage: 200mV typical at 1A load
• Maximum Output Current: 1A
• Quiescent Current: 50µA typical
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM3502SQX-44 has a total of 44 pins. The pin configuration is as follows:

Pin 1: VOUT Pin 2: GND Pin 3: EN Pin 4: FB Pin 5: NC ... Pin 44: VIN

Functional Features

• High Efficiency: The LM3502SQX-44 offers high efficiency, minimizing power loss during voltage regulation.
• Low Dropout Voltage: With a low dropout voltage, the IC can maintain a stable output voltage even when the input voltage is close to the desired output voltage.
• Adjustable Output Voltage: The output voltage can be adjusted within a specified range, providing flexibility for different applications.
• Current Limit Protection: The IC incorporates current limit protection to prevent excessive current flow and protect connected components.
• Thermal Shutdown Protection: In case of overheating, the LM3502SQX-44 has built-in thermal shutdown protection to safeguard against damage.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power consumption. - Low dropout voltage ensures stable output even with varying input voltages. - Adjustable output voltage allows for versatility in different applications. - Current limit protection prevents damage due to excessive current flow. - Thermal shutdown protection safeguards against overheating.

Disadvantages: - Limited maximum output current (1A). - Requires careful consideration of input and output voltage ranges.

Working Principles

The LM3502SQX-44 operates as a voltage regulator by comparing the output voltage with a reference voltage. It adjusts the resistance between the input and output to maintain a stable output voltage, compensating for changes in the input voltage or load conditions. This is achieved through internal circuitry that monitors and regulates the voltage difference.

Detailed Application Field Plans

The LM3502SQX-44 finds application in various electronic devices, including but not limited to: - Mobile phones - Portable media players - Digital cameras - Wireless communication devices - Battery-powered devices

In these applications, the LM3502SQX-44 ensures a stable and regulated voltage supply to different components, enhancing their performance and reliability.

Detailed and Complete Alternative Models

Some alternative models to the LM3502SQX-44 include: - LM317: Adjustable voltage regulator with higher output current capability. - LM1117: Fixed voltage regulator available in various output voltage options. - LT1083: High-current adjustable voltage regulator with low dropout voltage.

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

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