LM2587S-12/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - Step-up (Boost) Converter - Fixed Output Voltage of 12V - High Efficiency - Wide Input Voltage Range - Compact Package - Easy to Use

Package: TO-263-5 (D2PAK)

Essence: The LM2587S-12/NOPB is a voltage regulator IC that provides a fixed output voltage of 12V. It is primarily used as a step-up converter, which means it increases the input voltage to a higher level. This IC offers high efficiency and is suitable for various applications where a stable 12V power supply is required.

Packaging/Quantity: The LM2587S-12/NOPB is available in a TO-263-5 (D2PAK) package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 3.5V to 40V
• Output Voltage: 12V (fixed)
• Output Current: Up to 3A
• Switching Frequency: 100kHz
• Operating Temperature Range: -40°C to +125°C
• Efficiency: Up to 90%
• Protection Features: Overcurrent, Thermal Shutdown

Pin Configuration

The LM2587S-12/NOPB IC has five pins arranged as follows:

_______ | | IN | | GND |_______| | | SW | | FB |_______| | | VOUT | | |_______|

Pin Description: - IN: Input Voltage Pin - GND: Ground Pin - SW: Switching Pin - FB: Feedback Pin - VOUT: Output Voltage Pin

Functional Features

1. Step-Up Conversion: The LM2587S-12/NOPB efficiently boosts the input voltage to a fixed 12V output.
2. Wide Input Voltage Range: It can accept input voltages ranging from 3.5V to 40V, making it versatile for various power sources.
3. High Efficiency: With an efficiency of up to 90%, it minimizes power losses and maximizes energy conversion.
4. Overcurrent Protection: The IC incorporates overcurrent protection to safeguard against excessive current flow.
5. Thermal Shutdown: It includes thermal shutdown protection to prevent overheating and potential damage.

Advantages and Disadvantages

Advantages: - Provides a stable 12V output voltage - High efficiency results in minimal power loss - Wide input voltage range allows for flexibility in power source selection - Compact package enables easy integration into different applications - Offers overcurrent and thermal protection features

Disadvantages: - Fixed output voltage may not be suitable for applications requiring variable voltage levels - Limited output current capacity (up to 3A)

Working Principles

The LM2587S-12/NOPB operates as a step-up converter using a switching regulator topology. It utilizes an internal oscillator to control the switching of an external power switch. The input voltage is stepped up by the power switch and transformed into a regulated 12V output voltage. The feedback pin monitors the output voltage and adjusts the duty cycle of the power switch to maintain a constant 12V.

Detailed Application Field Plans

The LM2587S-12/NOPB finds applications in various fields, including: 1. Automotive: Powering 12V devices in vehicles such as car audio systems, lighting, and navigation systems. 2. Industrial: Providing a stable 12V supply for industrial automation equipment, control systems, and sensors. 3. Telecommunications: Powering communication devices, routers, and network equipment that require a 12V input. 4. Renewable Energy: Utilizing the IC in solar power systems to step up the voltage for charging batteries or powering appliances.

Detailed and Complete Alternative Models

1. LM2577-12: Similar to LM2587S-12/NOPB, but available in a different package (TO-220) and with a slightly lower efficiency.
2. LT1073-12: A comparable IC with a fixed 12V output, higher efficiency, and additional features like soft-start and adjustable frequency.

These alternative models can be considered based on specific requirements and availability.

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