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LM2677S-5.0 from NS,National Semiconductor

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LM2677S-5.0

Manufacturer: NS, 国半

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator with Sync

Partnumber Manufacturer Quantity Availability
LM2677S-5.0,LM2677S50 NS, 国半 3558 In Stock

Description and Introduction

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator with Sync The LM2677S-5.0 is a switching voltage regulator manufactured by National Semiconductor (NS). Below are its specifications, descriptions, and features based on factual information:

### **Specifications:**  
- **Output Voltage:** Fixed 5.0V  
- **Input Voltage Range:** 8V to 40V  
- **Output Current:** Up to 5A  
- **Switching Frequency:** 260 kHz (typical)  
- **Efficiency:** Up to 92%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** TO-263-7 (D2PAK)  
- **Regulation Type:** Buck (Step-Down) Converter  

### **Descriptions:**  
The LM2677S-5.0 is a monolithic integrated circuit designed for step-down (buck) voltage regulation. It provides a fixed 5.0V output with high efficiency, making it suitable for power supply applications requiring high current. The device includes an internal NPN switch, frequency compensation, and a fixed-frequency oscillator.

### **Features:**  
- Simple and easy-to-use design with minimal external components  
- Internal soft-start for reduced inrush current  
- Thermal shutdown and current limit protection  
- Adjustable output version available (LM2677)  
- Low standby current in shutdown mode  
- High efficiency (up to 92%)  

This information is sourced from the manufacturer's datasheet. No additional guidance or suggestions are included.

Application Scenarios & Design Considerations

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator with Sync

Alternative Part Number

  • TPS5450DDA --: 5A step-down converter in SOIC-8 PowerPAD with fixed 5.0V output option, similar current rating and function to the LM2677S-5.0.
  • LT1936EMS8E-5 --: Fixed 5V step-down regulator in MSOP-8E package, comparable switching regulator function and output voltage.
  • MC34063ADR2G --: Widely available general-purpose DC-DC switching regulator in SOIC-8 that can be configured for 5V step-down output, useful as a flexible lower-cost alternative.

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