LM5115SD

Product Overview

Category: Integrated Circuit (IC)

Use: The LM5115SD is a high voltage, synchronous buck controller designed for use in various power management applications. It provides efficient and reliable control of the output voltage by regulating the duty cycle of the switching transistor.

Characteristics: - High voltage capability - Synchronous rectification - Adjustable frequency - Current mode control - Overcurrent protection - Thermal shutdown protection

Package: The LM5115SD is available in a small outline package (SOP) with 8 pins. This compact package allows for easy integration into circuit designs.

Essence: The essence of the LM5115SD lies in its ability to efficiently regulate high voltage power supplies, ensuring stable and reliable operation of electronic devices.

Packaging/Quantity: The LM5115SD is typically sold in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Input Voltage Range: 4.5V to 75V
• Output Voltage Range: 0.8V to 60V
• Maximum Switching Frequency: 1MHz
• Operating Temperature Range: -40°C to 125°C
• Maximum Duty Cycle: 90%
• Quiescent Current: 100µA

Detailed Pin Configuration

The LM5115SD features the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. FB: Feedback pin for voltage regulation
4. COMP: Compensation pin for stability control
5. EN: Enable pin for turning the device on/off
6. SS: Soft-start pin for gradual startup
7. PGND: Power ground pin
8. SW: Switching node pin for connecting the external switch

Functional Features

• High voltage capability allows for use in a wide range of applications
• Synchronous rectification improves efficiency and reduces power losses
• Adjustable frequency enables optimization for different operating conditions
• Current mode control provides fast transient response and cycle-by-cycle current limiting
• Overcurrent protection safeguards against excessive current flow
• Thermal shutdown protection prevents damage due to overheating

Advantages and Disadvantages

Advantages: - Wide input voltage range allows for versatile use - High efficiency operation reduces power consumption - Comprehensive protection features enhance reliability - Compact package facilitates easy integration into designs

Disadvantages: - Limited maximum duty cycle may restrict certain applications - Higher cost compared to non-synchronous buck controllers

Working Principles

The LM5115SD operates by regulating the duty cycle of the switching transistor in a synchronous buck configuration. It uses a feedback mechanism to compare the output voltage with a reference voltage, adjusting the duty cycle accordingly to maintain the desired output voltage. The device also incorporates various protection features to ensure safe operation.

Detailed Application Field Plans

The LM5115SD finds application in various fields, including: 1. Industrial power supplies 2. Automotive electronics 3. Telecommunications equipment 4. Renewable energy systems 5. LED lighting

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the LM5115SD include: - LM5116SD - LM5117SD - LM5118SD - LM5119SD

These models share many characteristics and specifications with the LM5115SD, providing flexibility in choosing the most suitable option for specific applications.

In conclusion, the LM5115SD is a high voltage, synchronous buck controller that offers efficient and reliable power management capabilities. With its adjustable frequency, comprehensive protection features, and compact package, it is well-suited for a wide range of applications in various industries.