LM34902ITMX/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - High efficiency - Low dropout voltage - Wide input voltage range - Adjustable output voltage - Overcurrent protection - Thermal shutdown protection

Package: SOT-23-5

Essence: The LM34902ITMX/NOPB is a voltage regulator IC that provides a stable and regulated output voltage for various electronic devices.

Packaging/Quantity: Available in tape and reel packaging, with 3000 units per reel.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: 0.8V to VIN
• Dropout Voltage: 200mV at 100mA load current
• Quiescent Current: 45µA
• Maximum Output Current: 500mA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM34902ITMX/NOPB has the following pin configuration:

1. GND (Ground)
2. EN (Enable)
3. FB (Feedback)
4. VIN (Input Voltage)
5. VOUT (Output Voltage)

Functional Features

• High Efficiency: The LM34902ITMX/NOPB offers high efficiency, minimizing power loss and maximizing battery life.
• Low Dropout Voltage: With a low dropout voltage of 200mV, it can maintain a stable output voltage even when the input voltage is close to the desired output voltage.
• Wide Input Voltage Range: It can accept input voltages ranging from 2.7V to 5.5V, making it suitable for a wide range of applications.
• Adjustable Output Voltage: The output voltage can be adjusted from 0.8V to the input voltage, providing flexibility for different device requirements.
• Overcurrent Protection: The IC incorporates overcurrent protection, safeguarding the connected devices from excessive current flow.
• Thermal Shutdown Protection: It includes thermal shutdown protection, preventing damage due to excessive heat.

Advantages and Disadvantages

Advantages: - High efficiency leads to longer battery life. - Wide input voltage range allows for versatile applications. - Adjustable output voltage provides flexibility. - Overcurrent and thermal shutdown protection ensure device safety.

Disadvantages: - Limited maximum output current of 500mA may not be suitable for high-power applications. - SOT-23-5 package may require additional space on the PCB.

Working Principles

The LM34902ITMX/NOPB is a linear voltage regulator that uses a feedback mechanism to maintain a stable output voltage. When the input voltage exceeds the desired output voltage, the regulator reduces the voltage using a pass transistor. Conversely, if the input voltage drops below the desired output voltage, the regulator increases the voltage to compensate. This feedback loop ensures a constant and regulated output voltage.

Detailed Application Field Plans

The LM34902ITMX/NOPB can be used in various applications, including but not limited to: 1. Battery-powered devices 2. Portable electronics 3. IoT devices 4. Wearable devices 5. Automotive electronics 6. Industrial control systems

Detailed and Complete Alternative Models

1. LM317: A popular adjustable linear voltage regulator with a higher maximum output current of 1.5A.
2. LM1117: Another adjustable linear voltage regulator with a lower dropout voltage of 1.2V.
3. LT1763: A low dropout linear voltage regulator with a maximum output current of 500mA and a wide input voltage range.

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

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