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L4974A from STM,ST Microelectronics

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L4974A

Manufacturer: STM

3.5A SWITCHING REGULATOR

Partnumber Manufacturer Quantity Availability
L4974A STM 539 In Stock

Description and Introduction

3.5A SWITCHING REGULATOR The L4974A is a step-down switching regulator manufactured by STMicroelectronics (STM).  

### **Key Specifications:**  
- **Input Voltage Range:** 8V to 55V  
- **Output Voltage Range:** Adjustable from 3.3V to 50V  
- **Output Current:** Up to 4A  
- **Switching Frequency:** 200 kHz (fixed)  
- **Efficiency:** Up to 90%  
- **Operating Temperature Range:** -40°C to +150°C (junction temperature)  
- **Package:** PowerDIP-20 or SO-20 (with exposed pad for heat dissipation)  

### **Features:**  
- **Overvoltage Protection (OVP)**  
- **Undervoltage Lockout (UVLO)**  
- **Thermal Shutdown**  
- **Soft-Start Function**  
- **Current Limiting**  
- **Synchronous Rectification (for improved efficiency)**  
- **Adjustable Output Voltage via external resistors**  

### **Applications:**  
- Industrial power supplies  
- Automotive systems  
- Battery chargers  
- Distributed power systems  

This regulator is designed for high-efficiency DC-DC conversion in demanding environments.

Application Scenarios & Design Considerations

3.5A SWITCHING REGULATOR

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