500mA positive voltage regulator, 9V The **L7809CD2T** is a **9V positive voltage regulator** manufactured by **STMicroelectronics (ST)**.  

### **Key Specifications:**  
- **Output Voltage:** 9V (fixed)  
- **Output Current:** Up to **1.5A**  
- **Input Voltage Range:** Up to **35V**  
- **Dropout Voltage:** **2V (typical)**  
- **Operating Junction Temperature:** **-40°C to +125°C**  
- **Package:** **TO-263 (D²PAK)**  
- **Regulation Type:** **Linear (Fixed Positive)**  
- **Thermal Overload Protection:** **Yes**  
- **Short-Circuit Protection:** **Yes**  
- **Internal Current Limiting:** **Yes**  

### **Description:**  
The L7809CD2T is a **three-terminal linear voltage regulator** that provides a stable **9V DC output** from an unregulated input voltage. It is designed for **high-current applications** and includes built-in **thermal shutdown, current limiting, and safe operating area (SOA) protection**.  

### **Features:**  
- **Fixed 9V output**  
- **High ripple rejection**  
- **Thermal shutdown protection**  
- **Short-circuit and overload protection**  
- **Suitable for industrial and automotive applications**  
- **Low-cost, reliable voltage regulation**  

This regulator is commonly used in **power supplies, automotive electronics, and industrial control systems**.

500mA positive voltage regulator, 9V