LM3503SQX-35

Product Overview

Category

The LM3503SQX-35 belongs to the category of voltage regulators.

Use

It is primarily used for regulating voltage in electronic circuits.

Characteristics

• High precision voltage regulation
• Low dropout voltage
• Wide input voltage range
• Adjustable output voltage
• Current limiting and thermal shutdown protection

Package

The LM3503SQX-35 comes in a small outline package (SOP) with 8 pins.

Essence

The essence of the LM3503SQX-35 is its ability to provide stable and regulated voltage output, ensuring reliable operation of electronic devices.

Packaging/Quantity

The LM3503SQX-35 is typically packaged in reels or tubes and is available in large quantities for industrial applications.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: 1.2V to 3.3V
• Dropout Voltage: 200mV at 100mA
• Maximum Output Current: 150mA
• Quiescent Current: 60µA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM3503SQX-35 has the following pin configuration:

```

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| | --| VOUT | --| GND | --| FB | --| EN | --| VIN | --| NC | --| NC | |___________| ```

Functional Features

1. High Precision Voltage Regulation: The LM3503SQX-35 provides accurate and stable output voltage, ensuring precise operation of connected devices.
2. Low Dropout Voltage: With a low dropout voltage, the regulator can maintain a stable output even when the input voltage is close to the desired output voltage.
3. Wide Input Voltage Range: The LM3503SQX-35 can accept a wide range of input voltages, making it suitable for various applications.
4. Adjustable Output Voltage: The output voltage can be adjusted within a specified range to meet specific requirements.
5. Current Limiting and Thermal Shutdown Protection: The regulator incorporates protection mechanisms to prevent damage due to excessive current or temperature.

Advantages and Disadvantages

Advantages

• High precision voltage regulation ensures reliable performance.
• Low dropout voltage allows efficient power conversion.
• Wide input voltage range provides flexibility in application.
• Adjustable output voltage accommodates different requirements.
• Current limiting and thermal shutdown protection enhance device safety.

Disadvantages

• Limited maximum output current may restrict usage in high-power applications.
• Quiescent current consumption may impact overall power efficiency.

Working Principles

The LM3503SQX-35 is a linear voltage regulator that uses a feedback mechanism to maintain a stable output voltage. It compares the output voltage with a reference voltage and adjusts the internal circuitry to regulate the output. By controlling the pass transistor, it adjusts the voltage drop across it to achieve the desired output voltage.

Detailed Application Field Plans

The LM3503SQX-35 finds applications in various fields, including:

1. Portable Electronics: It can be used in smartphones, tablets, and portable media players to regulate voltage for different components.
2. IoT Devices: The regulator can provide stable voltage for sensors, microcontrollers, and wireless modules in IoT devices.
3. Automotive Electronics: It can be employed in automotive systems to regulate voltage for infotainment systems, lighting, and control modules.
4. Industrial Automation: The LM3503SQX-35 can be utilized in industrial automation equipment to ensure stable voltage supply for control circuits.

Detailed and Complete Alternative Models

1. LM317: A popular linear voltage regulator with adjustable output voltage and high precision.
2. LM1117: Another widely used regulator with low dropout voltage and a range of fixed output voltages.
3. LT1763: A high-performance regulator with low quiescent current and excellent line regulation.

These alternative models offer similar functionality to the LM3503SQX-35 and can be considered based on specific requirements.

In conclusion, the LM3503SQX-35 is a voltage regulator that provides precise and stable voltage output. Its wide input voltage range, adjustable output voltage, and protection features make it suitable for various applications in portable electronics, IoT devices, automotive electronics, and industrial automation. While it has limitations in terms of maximum output current and quiescent current consumption, there are alternative models available to meet specific needs.