LM3502SQX-35

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-35 (Surface Mount Package, 35 pins)

Essence: The LM3502SQX-35 is a voltage regulator IC designed to provide a stable and adjustable output voltage with high efficiency and low dropout voltage.

Packaging/Quantity: The LM3502SQX-35 is available in a surface mount package with 35 pins. It is typically sold in reels or tubes containing multiple units.

Specifications

The LM3502SQX-35 has the following specifications:

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: 0.8V to VIN
• Maximum Output Current: 500mA
• Dropout Voltage: 200mV at 100mA
• Quiescent Current: 60µA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM3502SQX-35 has a total of 35 pins. The pin configuration is as follows:

1. VOUT
2. GND
3. EN
4. FB
5. COMP
6. SS
7. PGND
8. VREF
9. VDD
10. VDD
11. VDD
12. VDD
13. VDD
14. VDD
15. VDD
16. VDD
17. VDD
18. VDD
19. VDD
20. VDD
21. VDD
22. VDD
23. VDD
24. VDD
25. VDD
26. VDD
27. VDD
28. VDD
29. VDD
30. VDD
31. VDD
32. VDD
33. VDD
34. VDD
35. VIN

Functional Features

• Adjustable Output Voltage: The LM3502SQX-35 allows the user to adjust the output voltage within a specified range, providing flexibility in various applications.
• High Efficiency: The voltage regulator operates with high efficiency, minimizing power losses and maximizing battery life.
• Low Dropout Voltage: The dropout voltage of the LM3502SQX-35 is very low, ensuring stable operation even when the input voltage is close to the desired output voltage.
• Current Limit Protection: The IC incorporates current limit protection, preventing excessive current flow and protecting the circuit from damage.
• Thermal Shutdown Protection: The LM3502SQX-35 includes thermal shutdown protection, which shuts down the device if the temperature exceeds a certain threshold, preventing overheating.

Advantages and Disadvantages

Advantages: - Adjustable output voltage provides versatility in different applications. - High efficiency leads to reduced power consumption. - Low dropout voltage ensures stable operation. - Current limit and thermal shutdown protection enhance reliability and safety.

Disadvantages: - Limited maximum output current (500mA). - Requires external components for proper operation.

Working Principles

The LM3502SQX-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 achieve the desired output voltage. The regulator operates by controlling the flow of current between the input and output terminals, maintaining a constant voltage difference across the device.

Detailed Application Field Plans

The LM3502SQX-35 can be used in various applications, including but not limited to: 1. Battery-powered devices: Provides stable voltage for portable electronic devices, such as smartphones, tablets, and wearable devices. 2. Automotive electronics: Regulates voltage for automotive systems, including infotainment systems, lighting, and sensors. 3. Industrial equipment: Ensures reliable power supply for industrial control systems, motor drives, and instrumentation.

Detailed and Complete Alternative Models

1. LM317: Adjustable voltage regulator with a maximum output current of 1.5A.
2. LM1117: Fixed voltage regulator available in various output voltages with a maximum output current of 800mA.
3. LT1084: High-current adjustable voltage regulator capable of delivering up to 5A of output current.

These alternative models offer similar functionality to the LM3502SQX-35 but may have different specifications and package options.

In conclusion, the LM3502SQX-35 is a versatile voltage regulator IC that provides adjustable output voltage, high efficiency, and low dropout voltage. It offers various protection features and finds applications in battery-powered devices, automotive electronics, and industrial equipment. Alternative models like LM317, LM1117, and LT1084 can be considered based on