LM25115SDX/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High efficiency, wide input voltage range, adjustable output voltage, compact package
• Package: SDX (8-pin SOIC)
• Essence: Step-down switching regulator
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 4.5V to 42V
• Output Voltage Range: 0.8V to 37V
• Switching Frequency: 100kHz to 2.2MHz
• Maximum Output Current: 1.5A
• Efficiency: Up to 95%
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LM25115SDX/NOPB IC has the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. FB: Feedback pin for output voltage regulation
4. EN: Enable pin to control the device operation
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 power switch
8. VOUT: Output voltage pin

Functional Features

• Wide input voltage range allows for versatile applications
• Adjustable output voltage provides flexibility
• High efficiency minimizes power loss
• Integrated protection features such as thermal shutdown and overcurrent protection ensure safe operation
• Soft-start function prevents excessive inrush current during startup

Advantages and Disadvantages

Advantages

• High efficiency results in reduced power consumption
• Compact package enables space-saving designs
• Wide input voltage range accommodates various power sources
• Adjustable output voltage suits different application requirements

Disadvantages

• Maximum output current limited to 1.5A, may not be suitable for high-power applications
• Limited pin configuration options restricts flexibility in circuit design

Working Principles

The LM25115SDX/NOPB is a step-down switching regulator that converts a higher input voltage to a lower output voltage. It utilizes a power switch and an inductor to store and transfer energy efficiently. The device operates by controlling the duty cycle of the power switch to regulate the output voltage. This switching action allows for high efficiency and reduced power loss compared to linear regulators.

Detailed Application Field Plans

The LM25115SDX/NOPB is commonly used in various applications, including:

1. Industrial automation systems
2. Automotive electronics
3. Telecommunications equipment
4. Power supplies for consumer electronics
5. LED lighting systems

Detailed and Complete Alternative Models

1. LM2596S-ADJ: Similar step-down switching regulator with adjustable output voltage, higher maximum output current (3A)
2. LM2576T-ADJ: Step-down switching regulator with adjustable output voltage, lower maximum output current (1A)
3. LM2678S-ADJ: Step-down switching regulator with adjustable output voltage, higher maximum output current (5A)

These alternative models offer different specifications and features, allowing designers to choose the most suitable option for their specific application requirements.

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