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L4979MD from ST,ST Microelectronics

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L4979MD

Manufacturer: ST, STM

LOW DROP VOLTAGE REGULATOR

Partnumber Manufacturer Quantity Availability
L4979MD ST, STM 40743 In Stock

Description and Introduction

LOW DROP VOLTAGE REGULATOR The part **L4979MD** is manufactured by **STMicroelectronics (ST)**. Below are the specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:  

### **Specifications:**  
- **Manufacturer:** STMicroelectronics (ST)  
- **Category:** Power Management ICs  
- **Type:** Switching Voltage Regulator  
- **Output Type:** Adjustable  
- **Output Voltage Range:** 3.3V to 50V  
- **Output Current:** Up to 10A  
- **Input Voltage Range:** 15V to 55V  
- **Switching Frequency:** Adjustable up to 300kHz  
- **Package:** Multiwatt15V (Vertical)  
- **Operating Temperature Range:** -40°C to +150°C  
- **Protection Features:** Overcurrent, Overtemperature, Undervoltage Lockout (UVLO)  

### **Description:**  
The **L4979MD** is a high-efficiency **step-down (buck) switching regulator** designed for high-power applications. It integrates a **DMOS power switch** and advanced control circuitry, making it suitable for industrial, automotive, and telecom applications requiring high current and voltage regulation.  

### **Features:**  
- **High Efficiency (up to 90%)**  
- **Adjustable Output Voltage (3.3V to 50V)**  
- **10A Continuous Output Current**  
- **Wide Input Voltage Range (15V to 55V)**  
- **Programmable Switching Frequency (up to 300kHz)**  
- **Built-in Soft-Start Function**  
- **Thermal Shutdown Protection**  
- **Overcurrent Protection**  
- **Undervoltage Lockout (UVLO)**  
- **Multiwatt15V Package for Better Heat Dissipation**  

This information is based on the manufacturer's datasheet and technical documentation. For detailed electrical characteristics and application circuits, refer to the official **STMicroelectronics datasheet**.

Application Scenarios & Design Considerations

LOW DROP VOLTAGE REGULATOR

Alternative Part Number

  • TLE4275G --: Low-dropout 5V linear regulator in a similar power package with comparable current capability, widely used as a drop-in substitute for automotive-grade regulators.
  • LM2940CT-5.0 --: Classic 5V low-dropout regulator with 1A output and thermal shutdown, functionally similar and readily available.
  • MC33269DT-5.0G --: 5V low-dropout regulator in DPAK with 800mA output, offering similar regulation performance and protection features.
  • MC33063ADR2G --: Widely available DC-DC switching regulator in SOIC-8, functionally similar to the L4979 buck converter family and easy to source as a drop-in style alternative.
  • LM2596S-ADJ --: Popular adjustable step-down switching regulator with similar voltage/current capability, well documented and broadly stocked as a replacement for ST switching regulators.
  • MP1584EN --: Compact high-frequency buck converter offering comparable input range and current rating, suitable as a modern alternative when layout can be adapted.

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