UP TO 4A ULDO LINEAR REGULATOR The part **L4957D1.5** is a **low-dropout (LDO) voltage regulator** manufactured by **STMicroelectronics (ST)**.  

### **Key Specifications:**  
- **Output Voltage:** 1.5V (fixed)  
- **Input Voltage Range:** Up to 28V  
- **Dropout Voltage:** Typically 0.5V at 1A load  
- **Output Current:** 1.5A (maximum)  
- **Line Regulation:** 0.05% (typical)  
- **Load Regulation:** 0.1% (typical)  
- **Quiescent Current:** 10mA (typical)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** TO-220 (5-pin)  

### **Features:**  
- **Low Dropout Voltage** for high-efficiency performance  
- **Thermal Overload Protection**  
- **Short-Circuit Protection**  
- **Reverse Polarity Protection**  
- **Adjustable Output Voltage** (when used with external resistors)  
- **High Ripple Rejection Ratio (70dB at 1kHz)**  
- **Stable with Low-ESR Capacitors**  

This regulator is designed for **automotive, industrial, and consumer applications** requiring stable, low-noise power supplies.

UP TO 4A ULDO LINEAR REGULATOR