LP2951-03BM

Product Overview

Category: Integrated Circuits (ICs)

Use: Voltage Regulator

Characteristics: - Low Dropout Voltage - Low Quiescent Current - Adjustable Output Voltage - Thermal Shutdown Protection

Package: SOT-23

Essence: The LP2951-03BM is a voltage regulator IC designed to provide a stable and regulated output voltage for various electronic applications.

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

Specifications

• Input Voltage Range: 4.2V to 30V
• Output Voltage Range: 1.24V to 29V
• Dropout Voltage: 400mV at 100mA
• Quiescent Current: 75µA
• Output Current: 100mA
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LP2951-03BM has the following pin configuration:

1. GND (Ground)
2. VOUT (Output Voltage)
3. ADJ (Adjustment Pin)
4. VIN (Input Voltage)

Functional Features

• Low dropout voltage ensures efficient regulation even when the input voltage is close to the desired output voltage.
• Low quiescent current minimizes power consumption during standby or idle conditions.
• Adjustable output voltage allows flexibility in setting the desired voltage level.
• Thermal shutdown protection prevents damage due to excessive temperature.

Advantages and Disadvantages

Advantages: - Wide input voltage range enables compatibility with various power sources. - Small package size (SOT-23) makes it suitable for space-constrained applications. - Low quiescent current prolongs battery life in portable devices. - Thermal shutdown protection enhances reliability and safety.

Disadvantages: - Limited output current of 100mA may not be sufficient for high-power applications. - Dropout voltage of 400mV at 100mA may cause a significant power loss in certain scenarios.

Working Principles

The LP2951-03BM operates as a linear voltage regulator. It uses a pass transistor to regulate the output voltage based on the feedback received from the adjustment pin (ADJ). The internal circuitry compares the reference voltage with the feedback voltage and adjusts the pass transistor accordingly to maintain a stable output voltage.

Detailed Application Field Plans

The LP2951-03BM is commonly used in various electronic devices and systems, including but not limited to: - Battery-powered devices - Portable audio players - Mobile phones - Digital cameras - Industrial control systems - Automotive electronics

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the LP2951-03BM include: - LM1117-3.3: Fixed output voltage of 3.3V - LT1763: Low dropout voltage regulator with adjustable output voltage - MAX603: Low quiescent current voltage regulator with fixed output voltage

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

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