UP TO 5A ULTRA LOW DROP OUPUT LINEAR REGULATOR The part **L4957AV3.3** is a **3.3V low-dropout voltage regulator** manufactured by **STMicroelectronics (ST)**.  

### **Specifications:**  
- **Output Voltage:** 3.3V (fixed)  
- **Output Current:** Up to 1.5A  
- **Dropout Voltage:** Typically 0.5V at full load  
- **Input Voltage Range:** Up to 28V  
- **Low Quiescent Current:** ~5mA (typical)  
- **Thermal Protection:** Yes  
- **Short-Circuit Protection:** Yes  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** TO-220 (5-lead)  

### **Features:**  
- **Low dropout voltage** for improved efficiency  
- **High ripple rejection** for stable output  
- **Internal current and thermal limiting** for protection  
- **Adjustable output voltage** (with external resistors, but fixed 3.3V in this variant)  
- **Suitable for automotive applications** (AEC-Q100 qualified)  

This regulator is commonly used in **power supply circuits, automotive systems, and industrial applications** requiring stable 3.3V power.  

Would you like additional details on a specific aspect?

UP TO 5A ULTRA LOW DROP OUPUT LINEAR REGULATOR