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LM2670S-3.3 from NSC,National Semiconductor

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LM2670S-3.3

Manufacturer: NSC

SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with Sync

Partnumber Manufacturer Quantity Availability
LM2670S-3.3,LM2670S33 NSC 3 In Stock

Description and Introduction

SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with Sync The LM2670S-3.3 is a step-down voltage regulator manufactured by National Semiconductor (NSC). Below are its specifications, descriptions, and features:

### **Specifications:**
- **Output Voltage:** 3.3V (fixed)  
- **Input Voltage Range:** 8V to 40V  
- **Output Current:** Up to 3A  
- **Switching Frequency:** 260 kHz (typical)  
- **Efficiency:** Up to 92%  
- **Dropout Voltage:** 1.2V (typical at 3A)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** TO-263 (D2PAK)  

### **Descriptions:**
- The LM2670S-3.3 is a monolithic integrated circuit designed for step-down (buck) voltage regulation.  
- It provides high efficiency with minimal external components.  
- Includes features like thermal shutdown, current limiting, and an on/off control pin.  

### **Features:**
- Simple and easy-to-use design  
- High efficiency (up to 92%)  
- Internal soft-start for reduced inrush current  
- Adjustable output version available (LM2670)  
- Thermal shutdown and current limit protection  
- Low standby current (50 µA typical in shutdown mode)  
- Requires only 5 external components for operation  

This regulator is commonly used in power supply applications requiring a stable 3.3V output from higher input voltages.

Partnumber Manufacturer Quantity Availability
LM2670S-3.3,LM2670S33 NS 70 In Stock

Description and Introduction

SIMPLE SWITCHER High Efficiency 3A Step-Down Voltage Regulator with Sync The LM2670S-3.3 is a step-down voltage regulator manufactured by National Semiconductor (NS). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Output Voltage:** Fixed 3.3V  
- **Input Voltage Range:** 8V to 40V  
- **Output Current:** Up to 3A  
- **Switching Frequency:** 260 kHz (typical)  
- **Efficiency:** Up to 92%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** TO-263 (D2PAK)  

### **Descriptions:**
- The LM2670S-3.3 is a monolithic integrated circuit providing all active functions for a step-down (buck) switching regulator.  
- It is designed for high-efficiency power conversion with minimal external components.  
- Includes built-in frequency compensation and a fixed-frequency oscillator.  

### **Features:**
- **Simple and Easy to Use:** Requires only 5 external components.  
- **Internal Soft-Start:** Reduces inrush current during startup.  
- **Thermal Shutdown and Current Limit Protection:** Enhances reliability.  
- **High Efficiency:** Minimizes power dissipation.  
- **Low Standby Current:** Typically 50 µA in shutdown mode.  

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

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