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L4972AD from ST,ST Microelectronics

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L4972AD

Manufacturer: ST, STM

2A SWITCHING REGULATOR

Partnumber Manufacturer Quantity Availability
L4972AD ST, STM 883 In Stock

Description and Introduction

2A SWITCHING REGULATOR The L4972AD is a step-down monolithic power switching regulator manufactured by STMicroelectronics (STM). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:  

### **Specifications:**  
- **Input Voltage Range:** 15V to 50V  
- **Output Voltage Range:** Adjustable from 5.1V to 40V  
- **Output Current:** Up to 2A  
- **Switching Frequency:** 200 kHz (fixed)  
- **Efficiency:** Up to 92%  
- **Operating Temperature Range:** -25°C to +150°C (junction temperature)  
- **Package:** SO-20 (PowerSO-20)  

### **Descriptions:**  
- The L4972AD is a high-efficiency step-down (buck) switching regulator designed for DC-DC conversion.  
- It integrates a DMOS power switch, PWM controller, and protection features in a single monolithic device.  
- Suitable for applications requiring high efficiency and compact power supply solutions.  

### **Features:**  
- **Integrated Power Switch:** DMOS transistor with low on-resistance.  
- **Fixed-Frequency PWM Control:** 200 kHz operation for reduced noise and filtering requirements.  
- **Adjustable Output Voltage:** Set via an external resistor divider.  
- **Protection Features:**  
  - Overvoltage protection (OVP)  
  - Thermal shutdown  
  - Current limiting  
  - Undervoltage lockout (UVLO)  
- **Soft-Start Function:** Reduces inrush current during startup.  
- **Synchronization Capability:** Can be synchronized to an external clock.  

This information is based on the manufacturer's datasheet for the L4972AD by STMicroelectronics.

Application Scenarios & Design Considerations

2A SWITCHING REGULATOR

Alternative Part Number

  • UC3843AN --: Widely available current-mode PWM controller in a DIP-8 package, commonly used as a substitute in similar switching regulator designs; verify pinout and voltage ratings.
  • MC34063AP1 --: Versatile DC-DC switching regulator controller in DIP-8, often used as a functional replacement for simple buck/boost/inverting supplies; check current and frequency limits.
  • LM2576T-ADJ --: Adjustable step-down switching regulator in TO-220, suitable when the original is used in a buck converter; requires different external components and layout.

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