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L4971D from ST,ST Microelectronics

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L4971D

Manufacturer: ST

1.5A STEP DOWN SWITCHING REGULATOR

Partnumber Manufacturer Quantity Availability
L4971D ST 273 In Stock

Description and Introduction

1.5A STEP DOWN SWITCHING REGULATOR The L4971D is a monolithic step-down switching regulator manufactured by STMicroelectronics. Here are the key specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**  
- **Input Voltage Range:** 8V to 55V  
- **Output Voltage Range:** Adjustable from 3.3V to 50V  
- **Output Current:** Up to 1.5A  
- **Switching Frequency:** 200 kHz (fixed)  
- **Efficiency:** Up to 90%  
- **Operating Temperature Range:** -40°C to +150°C  
- **Package:** SO-20  

### **Descriptions:**  
- The L4971D is a step-down (buck) DC-DC converter designed for high-efficiency power supply applications.  
- It integrates a power MOSFET switch, PWM controller, and protection features in a single chip.  
- Suitable for automotive, industrial, and consumer electronics applications.  

### **Features:**  
- **Internal Power MOSFET:** Reduces external component count.  
- **PWM Current-Mode Control:** Ensures stable operation.  
- **Soft-Start Function:** Prevents inrush current.  
- **Undervoltage Lockout (UVLO):** Protects against low input voltage.  
- **Thermal Shutdown:** Prevents overheating.  
- **Short-Circuit Protection:** Enhances reliability.  
- **Adjustable Output Voltage:** Via external resistor divider.  

This information is strictly based on the manufacturer's datasheet.

Application Scenarios & Design Considerations

1.5A STEP DOWN SWITCHING REGULATOR

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