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L4937NL from ST,ST Microelectronics

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L4937NL

Manufacturer: ST

DUAL MULTIFUNCTION VOLTAGE REGULATOR

Partnumber Manufacturer Quantity Availability
L4937NL ST 15647 In Stock

Description and Introduction

DUAL MULTIFUNCTION VOLTAGE REGULATOR The part **L4937NL** is a voltage regulator manufactured by **STMicroelectronics (ST)**. Below are the factual details about its specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 4.5V to 28V  
- **Output Voltage:** 3.3V (fixed)  
- **Output Current:** Up to 250mA  
- **Dropout Voltage:** 0.4V (typical at 100mA)  
- **Quiescent Current:** 1.5mA (typical)  
- **Low Standby Current:** 10µA (typical)  
- **Line Regulation:** 0.2% (typical)  
- **Load Regulation:** 0.4% (typical)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** DIP-8 or SO-8  

### **Descriptions:**  
- The **L4937NL** is a low-dropout (LDO) voltage regulator designed for automotive and industrial applications.  
- It provides a stable 3.3V output with low power consumption and high reliability.  
- Includes built-in protection features such as thermal shutdown and short-circuit protection.  

### **Features:**  
- **Low Dropout Voltage** (suitable for battery-powered applications).  
- **Very Low Quiescent Current** (enhances efficiency in standby mode).  
- **Thermal Shutdown Protection** (prevents damage from overheating).  
- **Short-Circuit Protection** (safeguards against output faults).  
- **Reverse Polarity Protection** (protects against incorrect power supply connection).  
- **Automotive-Grade Reliability** (qualified for harsh environments).  

For exact performance characteristics, refer to the **STMicroelectronics datasheet** for the **L4937NL**.

Application Scenarios & Design Considerations

DUAL MULTIFUNCTION VOLTAGE REGULATOR

Alternative Part Number

  • LM2940CT-5.0 --: Widely available 5V low-dropout linear regulator in TO-220, functionally similar to the L4937 low-dropout regulator family and easy to source as a drop-in for many designs.
  • MC33269DT-5.0 --: 5V low-dropout regulator with similar current capability and thermal behavior, commonly used as a second-source alternative to ST L-series LDOs.
  • L78L05ACZ --: Standard 5V linear regulator from ST with broad availability; acceptable when dropout requirements are modest and a simple three-terminal regulator is sufficient.
  • LM2931CT --: Low-dropout linear regulator with similar voltage/current ratings and TO-220 package, widely available and pin-compatible in most designs.
  • MC33269T-5.0 --: 5V low-dropout regulator in TO-220 with comparable current capability, suitable drop-in replacement for many L4937 applications.

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