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LM2574N-3.3/NOPB from NS,National Semiconductor

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LM2574N-3.3/NOPB

Manufacturer: NS

SIMPLE SWITCHER 0.5A Step-Down Voltage Regulator 8-PDIP -40 to 125

Partnumber Manufacturer Quantity Availability
LM2574N-3.3/NOPB,LM2574N33NOPB NS 90 In Stock

Description and Introduction

SIMPLE SWITCHER 0.5A Step-Down Voltage Regulator 8-PDIP -40 to 125 The LM2574N-3.3/NOPB is a step-down (buck) switching regulator manufactured by Texas Instruments (formerly National Semiconductor, NS).  

### **Specifications:**  
- **Output Voltage:** 3.3V (fixed)  
- **Input Voltage Range:** 4.5V to 40V  
- **Output Current:** Up to 0.5A  
- **Switching Frequency:** 52 kHz (fixed)  
- **Efficiency:** Up to 80%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** 8-Pin PDIP (Plastic Dual In-Line Package)  
- **Regulation Type:** PWM (Pulse Width Modulation)  
- **Protection Features:** Thermal shutdown and current limit  

### **Descriptions:**  
The LM2574N-3.3/NOPB is a monolithic integrated circuit that simplifies the design of a step-down switching regulator. It requires minimal external components and is designed for easy implementation in various power supply applications.  

### **Features:**  
- Simple and easy-to-use buck regulator  
- Requires only 4 external components  
- Internal frequency compensation  
- Low power standby mode (IQ ≈ 50 µA)  
- High efficiency compared to linear regulators  
- Wide input voltage range  
- Thermal shutdown and current limit protection  
- Available in fixed and adjustable output versions  

This regulator is commonly used in industrial, automotive, and consumer electronics applications.

Application Scenarios & Design Considerations

SIMPLE SWITCHER 0.5A Step-Down Voltage Regulator 8-PDIP -40 to 125

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