LM25115SD

Product Overview

Category: Integrated Circuit (IC)

Use: The LM25115SD is a high-performance synchronous buck regulator designed for use in various power management applications. It provides efficient voltage conversion with adjustable output voltage and current limit capabilities.

Characteristics: - High efficiency - Adjustable output voltage - Current limit protection - Wide input voltage range - Small package size

Package: The LM25115SD is available in a small outline integrated circuit (SOIC) package, which ensures easy integration into electronic circuits.

Essence: The LM25115SD is an essential component in power management systems, enabling efficient voltage conversion and reliable current regulation.

Packaging/Quantity: The LM25115SD is typically sold in reels containing a specified quantity of ICs, ensuring convenient handling and storage during manufacturing processes.

Specifications

The LM25115SD offers the following specifications:

• Input Voltage Range: 4.5V to 42V
• Output Voltage Range: 0.8V to 90% of the input voltage
• Maximum Output Current: 3A
• Switching Frequency: Up to 1MHz
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM25115SD features the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground reference pin
3. FB: Feedback pin for output voltage regulation
4. EN: Enable pin for turning the regulator on/off
5. SS/TR: Soft-start/tracking pin for controlling the startup behavior
6. PGND: Power ground pin
7. SW: Switch node pin for connecting the inductor and output capacitor
8. VOUT: Output voltage pin

Functional Features

The LM25115SD incorporates the following functional features:

1. High Efficiency: The regulator achieves high efficiency by utilizing synchronous rectification and optimizing switching techniques.
2. Adjustable Output Voltage: The output voltage can be adjusted within a specified range, allowing flexibility in various applications.
3. Current Limit Protection: The LM25115SD includes current limit protection to prevent excessive current flow, ensuring safe operation.
4. Wide Input Voltage Range: The regulator supports a wide input voltage range, making it suitable for diverse power supply scenarios.
5. Small Package Size: The compact SOIC package enables space-efficient integration into electronic systems.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power dissipation - Adjustable output voltage provides versatility - Current limit protection enhances system safety - Wide input voltage range accommodates different power sources - Compact package size allows for easy integration

Disadvantages: - Limited maximum output current (3A) - Requires careful thermal management at high operating temperatures

Working Principles

The LM25115SD operates as a synchronous buck regulator, converting a higher input voltage to a lower output voltage efficiently. It utilizes pulse-width modulation (PWM) techniques to control the duty cycle of the internal power switches, regulating the output voltage based on feedback from the FB pin. The regulator employs synchronous rectification to minimize power losses during switching transitions.

Detailed Application Field Plans

The LM25115SD finds application in various fields, including but not limited to:

1. Industrial Automation: Powering control systems, motor drives, and sensors.
2. Telecommunications: Providing efficient power conversion for base stations, routers, and network equipment.
3. Automotive Electronics: Supporting voltage regulation in automotive infotainment systems, lighting modules, and advanced driver-assistance systems (ADAS).
4. Renewable Energy: Enabling efficient power management in solar inverters and wind turbine control systems.
5. Consumer Electronics: Powering portable devices, home appliances, and audio/video equipment.

Detailed and Complete Alternative Models

1. LM25116SD: Similar to LM25115SD but with a higher maximum output current of 5A.
2. LM25117SD: Offers adjustable output voltage and current limit capabilities, with an extended input voltage range up to 60V.
3. LM25118SD: Designed for high-frequency operation, providing enhanced efficiency and reduced component size.

These alternative models offer similar functionality to the LM25115SD while catering to specific requirements in different applications.

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