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LM2674M-ADJ from NS Pb-free,National Semiconductor

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LM2674M-ADJ

Manufacturer: NS Pb-free, NS, NS, NSC, NATIONAL

SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator

Partnumber Manufacturer Quantity Availability
LM2674M-ADJ,LM2674MADJ NS Pb-free, NS, NS, NSC, NATIONAL 1031 In Stock

Description and Introduction

SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator The LM2674M-ADJ is a switching voltage regulator manufactured by National Semiconductor (NSC). Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:

### **Specifications:**  
- **Manufacturer:** National Semiconductor (NSC)  
- **Type:** Step-Down (Buck) Switching Regulator  
- **Output Voltage Range:** Adjustable (1.21V to 37V)  
- **Output Current:** 500mA  
- **Input Voltage Range:** 8V to 40V  
- **Switching Frequency:** 260kHz (fixed)  
- **Efficiency:** Up to 90%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** SOIC-8  

### **Descriptions:**  
- The LM2674M-ADJ is a monolithic integrated circuit designed for step-down (buck) voltage regulation.  
- It includes an internal N-channel MOSFET switch for high efficiency and minimal external components.  
- The adjustable output version allows flexibility in setting the desired output voltage using external resistors.  
- It features thermal shutdown and current limiting for protection.  

### **Features:**  
- **Simple and Efficient Design:** Requires only a few external components.  
- **Adjustable Output:** Set via external resistor divider.  
- **Internal Soft-Start:** Reduces inrush current during startup.  
- **Thermal Shutdown Protection:** Prevents overheating.  
- **Current Limiting:** Protects against overcurrent conditions.  
- **Low Power Standby Mode:** Improves efficiency at light loads.  

This information is strictly factual and derived from the manufacturer's datasheet. No additional suggestions or guidance are included.

Application Scenarios & Design Considerations

SIMPLE SWITCHER Power Converter High Efficiency 500mA Step-Down Voltage Regulator

Alternative Part Number

  • TPS5420D --: Pin-compatible step-down converter with adjustable output and similar current rating; TI is the successor to National Semiconductor, so it is a direct and well-supported replacement.
  • MC34063ADR2G --: Widely available adjustable buck/boost/inverting switching regulator in SOIC-8, a common low-cost substitute for simple step-down designs.
  • AP3211KTR-G1 --: Compact adjustable step-down converter in SOT-23-6, suitable when board space is limited and lower current is acceptable.
  • MP1584EN --: Adjustable step-down converter with similar wide input range and current capability, commonly used as a lower-cost alternative in the same application.
  • AP6503 --: Adjustable buck regulator offering similar switching performance and package options for drop-in style replacement.
  • LM2596S-ADJ --: Widely available adjustable step-down regulator with higher current capability and similar buck topology, easy drop-in for many LM2674 designs.
  • TPS54231D --: Adjustable buck converter from TI with similar voltage range and simple external component count, suitable as a functional replacement.

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