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L4978 from STM,ST Microelectronics

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L4978

Manufacturer: STM

2A STEP DOWN SWITCHING REGULATOR

Partnumber Manufacturer Quantity Availability
L4978 STM 10000 In Stock

Description and Introduction

2A STEP DOWN SWITCHING REGULATOR The L4978 is a switching regulator IC manufactured by STMicroelectronics (STM). Below are its key specifications, descriptions, and features based on available factual information:

### **Specifications:**  
- **Output Voltage:** Adjustable from 3.3V to 50V  
- **Output Current:** Up to 2.5A  
- **Input Voltage Range:** 8V to 55V  
- **Switching Frequency:** 200kHz (fixed)  
- **Efficiency:** Up to 90%  
- **Operating Temperature Range:** -40°C to +150°C (junction temperature)  
- **Package:** PowerDIP-16 or SO-16  

### **Descriptions:**  
- The L4978 is a step-down (buck) switching regulator designed for high-efficiency DC-DC conversion.  
- It integrates a DMOS power switch, PWM controller, and protection features in a single chip.  
- Suitable for applications requiring high current and voltage regulation, such as industrial, automotive, and power supplies.  

### **Features:**  
- **Internal Power Switch:** Reduces external component count.  
- **Soft-Start:** Limits inrush current during startup.  
- **Overcurrent Protection:** Prevents damage due to excessive load.  
- **Thermal Shutdown:** Protects against overheating.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation under low input voltage.  
- **Adjustable Output Voltage:** Set via external resistor divider.  
- **Synchronizable Switching Frequency:** Can be synchronized to an external clock.  

For exact application details, always refer to the official STMicroelectronics datasheet.

Application Scenarios & Design Considerations

2A STEP DOWN SWITCHING REGULATOR

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