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LM3940ISX-3.3/NOPB from NSC,National Semiconductor

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LM3940ISX-3.3/NOPB

Manufacturer: NSC

1A Low Dropout Regulator for 5V to 3.3V Conversion 3-DDPAK/TO-263 -40 to 125

Partnumber Manufacturer Quantity Availability
LM3940ISX-3.3/NOPB,LM3940ISX33NOPB NSC 8 In Stock

Description and Introduction

1A Low Dropout Regulator for 5V to 3.3V Conversion 3-DDPAK/TO-263 -40 to 125 The **LM3940ISX-3.3/NOPB** is a fixed-output 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)  
- **Output Voltage:** 3.3V (fixed)  
- **Output Current:** 1A (maximum)  
- **Input Voltage Range:** 4.5V to 7V  
- **Dropout Voltage:** 0.5V (typical at full load)  
- **Line Regulation:** 0.05% (typical)  
- **Load Regulation:** 0.1% (typical)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** TO-263-3 (D2PAK)  
- **Mounting Type:** Surface Mount  
- **Quiescent Current:** 10mA (typical)  
- **Protection Features:** Thermal shutdown, current limit  

### **Description:**  
The **LM3940ISX-3.3/NOPB** is a low-dropout (LDO) voltage regulator designed to provide a stable **3.3V** output from an input voltage ranging from **4.5V to 7V**. It is capable of delivering up to **1A** of output current with a low dropout voltage of **0.5V** (typical).  

### **Features:**  
- **Low Dropout Voltage:** Ensures efficient regulation even when the input voltage is close to the output voltage.  
- **High Current Capability:** Supports up to **1A** output current.  
- **Thermal Shutdown Protection:** Prevents damage due to overheating.  
- **Current Limiting:** Protects the regulator and load from excessive current.  
- **Stable Operation:** Requires only a small output capacitor for stability.  
- **Wide Temperature Range:** Operates reliably from **-40°C to +125°C**.  

This information is based solely on the manufacturer's datasheet and technical specifications.

Application Scenarios & Design Considerations

1A Low Dropout Regulator for 5V to 3.3V Conversion 3-DDPAK/TO-263 -40 to 125
Partnumber Manufacturer Quantity Availability
LM3940ISX-3.3/NOPB,LM3940ISX33NOPB NS 1840 In Stock

Description and Introduction

1A Low Dropout Regulator for 5V to 3.3V Conversion 3-DDPAK/TO-263 -40 to 125 The **LM3940ISX-3.3/NOPB** is a low-dropout voltage regulator manufactured by **Texas Instruments (formerly National Semiconductor, NS)**.  

### **Specifications:**  
- **Output Voltage:** 3.3V  
- **Maximum Input Voltage:** 7V  
- **Dropout Voltage:** 0.5V (typical) at 1A  
- **Output Current:** 1A  
- **Line Regulation:** 0.05% (typical)  
- **Load Regulation:** 0.1% (typical)  
- **Quiescent Current:** 10mA (typical)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** SOT-223 (4-pin)  

### **Description:**  
The LM3940 is a fixed-output, low-dropout regulator designed to provide a stable 3.3V output with high efficiency. It is suitable for applications requiring up to 1A of current with minimal voltage drop.  

### **Features:**  
- Low dropout voltage (0.5V typical at 1A)  
- Fixed 3.3V output  
- Thermal shutdown and current limit protection  
- Stable with low-ESR capacitors  
- Available in SOT-223 package  

This regulator is commonly used in battery-powered devices, embedded systems, and other applications requiring efficient voltage regulation.

Application Scenarios & Design Considerations

1A Low Dropout Regulator for 5V to 3.3V Conversion 3-DDPAK/TO-263 -40 to 125

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