LP3925RME-E/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High-efficiency, Low-dropout voltage regulator
• Package: 8-pin VSSOP
• Essence: Regulates input voltage to a stable output voltage
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 2.7V to 6.5V
• Output Voltage Range: 1.2V to 5.5V
• Output Current: Up to 500mA
• Dropout Voltage: 200mV at 500mA
• Quiescent Current: 75µA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LP3925RME-E/NOPB has the following pin configuration:

1. EN (Enable): Enable pin for turning the regulator on/off.
2. GND (Ground): Ground reference for the IC.
3. FB (Feedback): Feedback pin for setting the output voltage.
4. VOUT (Output Voltage): Output voltage pin.
5. VIN (Input Voltage): Input voltage pin.
6. BYP (Bypass): Bypass capacitor connection pin.
7. NC (No Connection): No electrical connection.
8. VREF (Reference Voltage): Reference voltage output pin.

Functional Features

• High efficiency: The LP3925RME-E/NOPB offers high efficiency, minimizing power loss during voltage regulation.
• Low dropout voltage: With a low dropout voltage of 200mV at 500mA, the IC can maintain a stable output voltage even when the input voltage is close to the desired output voltage.
• Thermal shutdown protection: The IC includes thermal shutdown protection to prevent damage due to excessive heat.
• Short-circuit protection: It features built-in short-circuit protection, safeguarding the IC and connected components from damage in case of a short circuit.

Advantages and Disadvantages

Advantages

• High efficiency results in reduced power consumption.
• Low dropout voltage ensures stable output even with low input voltages.
• Thermal shutdown and short-circuit protection enhance reliability and safety.

Disadvantages

• Limited output current capacity (up to 500mA).
• Requires external bypass capacitor for optimal performance.

Working Principles

The LP3925RME-E/NOPB is a linear voltage regulator that regulates the input voltage to a stable output voltage. It achieves this by using a pass transistor to control the amount of voltage dropped across it. The feedback pin (FB) is used to set the desired output voltage, which is compared to an internal reference voltage. Any difference between the two voltages is amplified and used to adjust the pass transistor's conduction, maintaining a constant output voltage.

Detailed Application Field Plans

The LP3925RME-E/NOPB is commonly used in various applications, including:

1. Battery-powered devices: It is suitable for portable electronic devices powered by batteries, such as smartphones, tablets, and portable media players.
2. IoT devices: The IC can be used in Internet of Things (IoT) devices that require efficient power management, such as sensors, smart home devices, and wearable technology.
3. Industrial equipment: It finds application in industrial equipment that requires stable and regulated power supply, such as control systems, motor drives, and instrumentation.

Detailed and Complete Alternative Models

1. LM1117-ADJ: Adjustable voltage regulator with similar specifications and package.
2. LT1763-3.3: Fixed 3.3V voltage regulator with low dropout voltage.
3. TPS7A4700: High-current, low-dropout voltage regulator with adjustable output voltage.

These alternative models offer similar functionality and can be considered as alternatives to the LP3925RME-E/NOPB based on specific requirements.

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