LM34904ITMX/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - High efficiency - Low dropout voltage - Wide input voltage range - Adjustable output voltage - Overcurrent and thermal protection

Package: SOT-23-5

Essence: The LM34904ITMX/NOPB is a voltage regulator IC designed to provide a stable output voltage from a wide range of input voltages. It offers high efficiency and low dropout voltage, making it suitable for various applications.

Packaging/Quantity: The LM34904ITMX/NOPB is available in a SOT-23-5 package. It is typically sold in reels containing 3000 units.

Specifications

• Input Voltage Range: 2.7V to 18V
• Output Voltage Range: 1.2V to 16V
• Dropout Voltage: 200mV at 500mA
• Quiescent Current: 100µA
• Maximum Output Current: 1A
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM34904ITMX/NOPB has the following pin configuration:

____ EN |1 5| VOUT GND |2 4| FB VIN |3___|

1. EN: Enable pin. Connects to logic high (≥1.2V) to enable the regulator.
2. GND: Ground pin. Connected to the system ground.
3. VIN: Input voltage pin. Connects to the input power source.
4. FB: Feedback pin. Connects to an external resistor divider network to set the desired output voltage.
5. VOUT: Output voltage pin. Provides the regulated output voltage.

Functional Features

• Wide input voltage range allows for versatile applications.
• Adjustable output voltage provides flexibility in system design.
• High efficiency minimizes power dissipation.
• Overcurrent and thermal protection ensure safe operation.

Advantages and Disadvantages

Advantages: - Wide input voltage range accommodates various power sources. - Adjustable output voltage allows customization for specific requirements. - High efficiency reduces power consumption. - Overcurrent and thermal protection enhance reliability.

Disadvantages: - Limited maximum output current (1A) may not be suitable for high-power applications. - SOT-23-5 package may require additional heat dissipation measures for certain operating conditions.

Working Principles

The LM34904ITMX/NOPB operates as a linear voltage regulator. It regulates the output voltage by comparing the feedback voltage (FB pin) with a reference voltage. The error amplifier adjusts the pass transistor to maintain the desired output voltage, compensating for changes in the input voltage and load conditions.

Detailed Application Field Plans

The LM34904ITMX/NOPB is commonly used in the following applications:

1. Battery-powered devices: Provides stable voltage regulation for portable electronics, such as smartphones, tablets, and wearable devices.
2. Industrial equipment: Suitable for powering sensors, actuators, and control circuits in industrial automation systems.
3. Automotive electronics: Used in automotive modules, infotainment systems, and lighting applications.
4. Power management systems: Can be integrated into power supply units, battery chargers, and DC-DC converters.

Detailed and Complete Alternative Models

1. LM317: Adjustable voltage regulator with a higher maximum output current of 1.5A.
2. LM1117: Fixed voltage regulator available in various output voltage options.
3. LT1086: Low dropout voltage regulator with adjustable output voltage and higher maximum output current (3A).
4. TPS7A4700: Ultra-low noise voltage regulator suitable for audio and precision applications.

These alternative models offer different features and specifications, providing options for specific design requirements.

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