IC Phoenix logo

Home ›  L  › L2 > L4973D3.3

L4973D3.3 from ST,ST,ST Microelectronics

Fast Delivery, Competitive Price @IC-phoenix

If you need more electronic components or better pricing, we welcome any inquiry.

0.000ms

L4973D3.3

Manufacturer: ST,ST

3.5A STEP DOWN SWITCHING REGULATOR

Partnumber Manufacturer Quantity Availability
L4973D3.3,L4973D33 ST,ST 10000 In Stock

Description and Introduction

3.5A STEP DOWN SWITCHING REGULATOR The L4973D3.3 is a step-down switching regulator manufactured by STMicroelectronics (ST). Below are the factual details from Ic-phoenix technical data files:

### **Manufacturer:**  
- **STMicroelectronics (ST)**  

### **Specifications:**  
- **Output Voltage:** 3.3V (fixed)  
- **Output Current:** Up to 3.5A  
- **Input Voltage Range:** 8V to 55V  
- **Switching Frequency:** 200kHz (adjustable up to 500kHz with external components)  
- **Efficiency:** Up to 90%  
- **Operating Temperature Range:** -40°C to +150°C  
- **Package:** SO-20 (PowerSO-20)  
- **Protection Features:**  
  - Overcurrent protection  
  - Thermal shutdown  
  - Undervoltage lockout  

### **Descriptions and Features:**  
- **Step-Down (Buck) Converter:** Converts higher input voltage to a regulated 3.3V output.  
- **High Efficiency:** Optimized for minimal power loss.  
- **Adjustable Frequency:** Allows optimization for efficiency or component size.  
- **Internal Power MOSFET:** Simplifies design by integrating the switching element.  
- **Soft-Start Function:** Reduces inrush current during startup.  
- **Error Amplifier:** Provides precise voltage regulation.  

This information is based on the manufacturer's datasheet and technical documentation.

Partnumber Manufacturer Quantity Availability
L4973D3.3,L4973D33 ST 614 In Stock

Description and Introduction

3.5A STEP DOWN SWITCHING REGULATOR The L4973D3.3 is a step-down switching regulator manufactured by STMicroelectronics. Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:  

### **Manufacturer:** STMicroelectronics  
### **Part Number:** L4973D3.3  
### **Type:** Step-Down (Buck) Switching Regulator  
### **Output Voltage:** 3.3V (Fixed)  
### **Output Current:** Up to 3.5A  
### **Input Voltage Range:** 8V to 55V  
### **Switching Frequency:** 200kHz  
### **Efficiency:** Up to 90%  
### **Package:** DIP-20 (Multiwatt-15)  

### **Key Features:**  
- **Fixed 3.3V Output** with ±2% accuracy  
- **Overcurrent Protection** with automatic recovery  
- **Thermal Shutdown** for overtemperature protection  
- **Soft-Start Function** to limit inrush current  
- **Undervoltage Lockout (UVLO)** for input voltage monitoring  
- **Synchronous Rectification** for improved efficiency  
- **Adjustable Current Limit**  

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

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

Partnumber Manufacturer Quantity Availability
L4973D3.3,L4973D33 STM 10000 In Stock

Description and Introduction

3.5A STEP DOWN SWITCHING REGULATOR The **L4973D3.3** is a **3.3V, 3.5A step-down switching regulator** manufactured by **STMicroelectronics (STM)**.  

### **Key Specifications:**  
- **Output Voltage:** 3.3V (fixed)  
- **Output Current:** Up to 3.5A  
- **Input Voltage Range:** 8V to 55V  
- **Switching Frequency:** 200kHz (fixed)  
- **Efficiency:** Up to 90%  
- **Operating Temperature Range:** -40°C to +150°C  
- **Package:** **Multiwatt15** (through-hole)  

### **Features:**  
- **Step-down (Buck) DC-DC converter**  
- **Internal current-mode control**  
- **Soft-start function**  
- **Overcurrent protection**  
- **Thermal shutdown protection**  
- **Undervoltage lockout (UVLO)**  
- **Adjustable output voltage version available (L4973)**  

### **Applications:**  
- **Power supplies for industrial and automotive systems**  
- **Distributed power systems**  
- **Telecommunications equipment**  
- **Battery chargers**  

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

Request Quotation

For immediate assistance, call us at +86 533 2716050 or email [email protected]

Part Number Quantity Target Price($USD) Email Contact Person
We offer highly competitive channel pricing. Get in touch for details.

Specializes in hard-to-find components chips