LM3502ITLX-16/NOPB

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: SOT-23-5

Essence: The LM3502ITLX-16/NOPB is a voltage regulator IC that provides a regulated output voltage from an unregulated input voltage. It is designed to deliver high output current with low dropout voltage, making it suitable for various applications.

Packaging/Quantity: The LM3502ITLX-16/NOPB is available in a SOT-23-5 package. It is typically sold in reels of 3000 units.

Specifications

• Input Voltage Range: 2.7V to 6V
• Output Voltage Range: 1.2V to 5.5V
• Dropout Voltage: 200mV at 100mA
• Maximum Output Current: 500mA
• Quiescent Current: 75µA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM3502ITLX-16/NOPB has the following pin configuration:

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Pin 1: Enable (EN) - Active high enable pin. Connects to logic high to enable the regulator.

Pin 2: GND - Ground reference for the IC.

Pin 3: Feedback (FB) - Connects to an external resistor divider network to set the desired output voltage.

Pin 4: VOUT - Regulated output voltage.

Pin 5: VIN - Unregulated input voltage.

Functional Features

• Low dropout voltage: The LM3502ITLX-16/NOPB 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, this voltage regulator can handle high current loads.
• Adjustable output voltage: The output voltage can be adjusted using an external resistor divider network connected to the FB pin.
• Thermal shutdown protection: The IC includes thermal shutdown protection to prevent damage due to excessive temperature.
• Short-circuit current limit: It incorporates a short-circuit current limit feature that protects the IC and the load from excessive current.

Advantages and Disadvantages

Advantages: - Low dropout voltage ensures efficient regulation even with small input-output voltage differentials. - High output current capability makes it suitable for power-hungry applications. - Adjustable output voltage allows flexibility in meeting specific voltage requirements. - Thermal shutdown protection prevents overheating and potential damage. - Short-circuit current limit protects the IC and load from excessive current.

Disadvantages: - Limited input voltage range (2.7V to 6V) may not be suitable for all applications requiring higher input voltages. - SOT-23-5 package may have size limitations for certain space-constrained designs.

Working Principles

The LM3502ITLX-16/NOPB operates as a linear voltage regulator. It uses a pass transistor to control the output voltage based on the feedback received from the FB pin. When the enable pin (EN) is set to logic high, the regulator is enabled, and the output voltage is regulated according to the feedback voltage. The dropout voltage is minimized to ensure efficient regulation even with small input-output voltage differentials.

Detailed Application Field Plans

The LM3502ITLX-16/NOPB can be used in various applications, including but not limited to: - Battery-powered devices - Portable electronics - Wireless communication systems - Industrial control systems - Automotive electronics

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the LM3502ITLX-16/NOPB are: - LM317: Adjustable voltage regulator with higher input voltage range. - LT1763: Low dropout voltage regulator with higher output current capability. - TPS7A47: Ultra-low dropout voltage regulator with adjustable output voltage.

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

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