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L4971 from STMICRO,ST Microelectronics

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L4971

Manufacturer: STMICRO

1.5A STEP DOWN SWITCHING REGULATOR

Partnumber Manufacturer Quantity Availability
L4971 STMICRO 1671 In Stock

Description and Introduction

1.5A STEP DOWN SWITCHING REGULATOR The L4971 is a switching regulator IC manufactured by STMicroelectronics. Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**  
- **Input Voltage Range:** 8V to 55V  
- **Output Voltage Range:** 3.3V to 50V (adjustable)  
- **Output Current:** Up to 1.5A  
- **Switching Frequency:** 200kHz (fixed)  
- **Efficiency:** Up to 90%  
- **Operating Temperature Range:** -40°C to +150°C  
- **Package:** PowerDIP-16 or SO-16  

### **Descriptions:**  
- The L4971 is a step-down (buck) switching regulator designed for high-efficiency DC-DC conversion.  
- It integrates a power MOSFET, PWM controller, and protection features in a single package.  
- Suitable for industrial, automotive, and power supply applications requiring high input voltage.  

### **Features:**  
- **Adjustable Output Voltage** via external resistors.  
- **Internal Current Limiting** for overload protection.  
- **Thermal Shutdown** to prevent overheating.  
- **Soft-Start Function** to reduce inrush current.  
- **Under-Voltage Lockout (UVLO)** for safe operation at low input voltages.  
- **Synchronization Capability** with external clock signals.  

For exact details, refer to the official STMicroelectronics datasheet.

Application Scenarios & Design Considerations

1.5A STEP DOWN SWITCHING REGULATOR

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