LM3481MM/NOPB

Product Overview

Category: Integrated Circuits (ICs)

Use: Voltage Regulators - Switching Regulators

Characteristics: - High Efficiency - Wide Input Voltage Range - Adjustable Output Voltage - Current Limit Protection - Thermal Shutdown Protection

Package: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Essence: The LM3481MM/NOPB is a high-performance switching regulator designed to provide efficient power conversion for various applications.

Packaging/Quantity: The LM3481MM/NOPB is available in tape and reel packaging with a quantity of 2500 units per reel.

Specifications

• Input Voltage Range: 4.5V to 36V
• Output Voltage Range: 1.23V to 34V
• Switching Frequency: Up to 1MHz
• Maximum Output Current: 1.5A
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM3481MM/NOPB has the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. FB: Feedback pin
4. EN: Enable pin
5. COMP: Compensation pin
6. SS/TR: Soft-start/Tracking pin
7. SW: Switch pin
8. VOUT: Output voltage pin

Functional Features

• Constant On-Time Control Architecture
• Cycle-by-Cycle Current Limit Protection
• Adjustable Soft-Start Time
• Overtemperature Protection
• Enable Pin for Power Sequencing
• External Synchronization Capability

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power dissipation - Wide input voltage range allows for versatile applications - Adjustable output voltage provides flexibility - Current limit and thermal shutdown protection enhance reliability

Disadvantages: - Limited maximum output current (1.5A) - Requires external synchronization for certain applications

Working Principles

The LM3481MM/NOPB utilizes a constant on-time control architecture to regulate the output voltage. It operates by adjusting the on-time of the internal power switch based on the feedback signal from the output voltage. This control scheme ensures fast transient response and stable operation.

The device also incorporates cycle-by-cycle current limit protection, which prevents excessive current flow during load transients or short circuit conditions. Additionally, it features overtemperature protection to safeguard against thermal damage.

Detailed Application Field Plans

The LM3481MM/NOPB is suitable for a wide range of applications, including but not limited to: - Industrial Power Supplies - Battery Chargers - LED Lighting - Distributed Power Systems - Telecom Infrastructure

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the LM3481MM/NOPB are: - LM2576-ADJ - LM2596S-ADJ - LT1370CR#PBF - TPS5430DDAR

These models offer similar functionality and can be used as substitutes depending on specific requirements.

In conclusion, the LM3481MM/NOPB is a versatile switching regulator with high efficiency and adjustable output voltage. Its compact package and comprehensive protection features make it suitable for various applications in different industries.