Overview
The LM2587S-5.0 is a high-performance switching regulator IC produced by National Semiconductor, now part of Texas Instruments. It belongs to the SIMPLE SWITCHER® series and is designed for applications requiring efficient power conversion. This model is particularly suited for boost, flyback, and forward converter topologies, offering a fixed 5V output. Its wide input voltage range of 4V to 40V and a maximum output current of 5A make it ideal for various industrial, automotive, and consumer electronics applications. The LM2587S-5.0 is packaged in a TO-263-6 (D²Pak) surface-mount form, ensuring robust performance in compact designs.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Series | SIMPLE SWITCHER® | - | - |
| Function | Boost, Flyback, Forward Converter | - | - |
| Output Configuration | Positive | - | - |
| Output Type | Fixed | - | - |
| Output Number | 1 | - | - |
| Input Voltage (Min) | 4 | V | - |
| Input Voltage (Max) | 40 | V | - |
| Output Voltage (Fixed) | 5 | V | - |
| Output Current | 5 | A | Switch |
| Switching Frequency | 100 | kHz | - |
| Operating Temperature | -40 to 125 | °C | Junction Temperature |
| Package | TO-263-6, D²Pak | - | 5 Leads + Tab |
Key Features
- Wide input voltage range (4V to 40V) for versatile applications.
- Fixed 5V output with a maximum switch current of 5A.
- Supports boost, flyback, and forward converter topologies.
- Internal 100kHz oscillator for compact magnetic components.
- Built-in soft-start function to reduce inrush current during startup.
- Protection features include current limiting, thermal shutdown, and undervoltage lockout.
Applications
The LM2587S-5.0 is widely used in power supply designs for industrial automation, automotive systems, and consumer electronics. Its ability to handle a broad input voltage range and deliver a stable 5V output makes it suitable for applications such as DC-DC converters, battery chargers, and LED drivers. Additionally, its robust design and protection mechanisms ensure reliable performance in harsh environments.
Q & A
1. What is the input voltage range of the LM2587S-5.0?
The input voltage range is 4V to 40V.
2. What is the fixed output voltage of this IC?
The fixed output voltage is 5V.
3. What is the maximum output current?
The maximum output current is 5A (switch).
4. What topologies does the LM2587S-5.0 support?
It supports boost, flyback, and forward converter topologies.
5. What is the switching frequency?
The switching frequency is 100kHz.
6. What are the protection features of this IC?
It includes current limiting, thermal shutdown, and undervoltage lockout.
7. What is the operating temperature range?
The operating temperature range is -40°C to 125°C (junction temperature).
8. What is the package type?
The package type is TO-263-6 (D²Pak).
9. Is this IC suitable for automotive applications?
Yes, its wide input range and robust design make it suitable for automotive systems.
10. Does it have a soft-start function?
Yes, it includes an internal soft-start function to reduce inrush current during startup.
