IC Phoenix logo

Home ›  L  › L29 > LM2678T-3.3

LM2678T-3.3 from

Fast Delivery, Competitive Price @IC-phoenix

If you need more electronic components or better pricing, we welcome any inquiry.

LM2678T-3.3

Manufacturer: NS

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator

Partnumber Manufacturer Quantity Availability
LM2678T-3.3,LM2678T33 NS 209 In Stock

Description and Introduction

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator The LM2678T-3.3 is a step-down voltage regulator manufactured by Texas Instruments. Below are its specifications, descriptions, and features:

### **Manufacturer Specifications:**
- **Input Voltage Range:** 8V to 40V  
- **Output Voltage:** 3.3V (fixed)  
- **Output Current:** Up to 5A  
- **Switching Frequency:** 260 kHz  
- **Efficiency:** Up to 92%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package Type:** TO-220 (7-pin)  
- **Regulation Type:** Switching (Buck)  

### **Descriptions:**
- The LM2678T-3.3 is a monolithic integrated circuit designed for step-down (buck) voltage regulation.  
- It provides a fixed 3.3V output with high efficiency, making it suitable for power supply applications.  
- The regulator includes internal frequency compensation, a fixed-frequency oscillator, and thermal shutdown protection.  

### **Features:**
- **High Efficiency:** Up to 92% efficiency reduces heat dissipation.  
- **Wide Input Voltage Range:** Operates from 8V to 40V.  
- **Fixed Output Voltage:** Pre-set to 3.3V.  
- **5A Output Current Capability:** Supports high-current applications.  
- **Internal Soft-Start:** Reduces inrush current during startup.  
- **Thermal Shutdown Protection:** Prevents damage from overheating.  
- **Short-Circuit Protection:** Includes cycle-by-cycle current limiting.  
- **Low Power Standby Mode:** Enhances efficiency in light-load conditions.  

This information is based on the manufacturer's datasheet for the LM2678T-3.3.

Application Scenarios & Design Considerations

SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator

Alternative Part Number

  • LT1083CP-3.3 --: 3.3V fixed linear regulator in TO-220, widely available and pin-compatible in many buck-converter replacement designs, though it is linear and less efficient.
  • TPS5430DDA --: 3A step-down converter with adjustable output settable to 3.3V, similar current capability and switching topology, common drop-in alternative for LM2678 designs.
  • MC34063AP --: Versatile adjustable buck/boost/inverting switching regulator in DIP-8, can be configured for 3.3V output and is a low-cost widely stocked substitute for simple buck applications.
  • TPS54332DDA --: 3.3V-capable step-down converter in SOIC-8 PowerPAD with similar current capability; widely available and pin-compatible in function.
  • MP1584EN --: Adjustable step-down regulator that can be set to 3.3V output, compact SOIC-8 package, low cost and good availability.
  • L5973D --: 3.3V step-down switching regulator with integrated switch, similar input voltage range and output current, suitable drop-in functional replacement.

Request Quotation

For immediate assistance, call us at +86 533 2716050 or email [email protected]

Part Number Quantity Target Price($USD) Email Contact Person
We offer highly competitive channel pricing. Get in touch for details.

Specializes in hard-to-find components chips