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MC78LC40NTR from ON,ON Semiconductor

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MC78LC40NTR

Manufacturer: ON, MOTO

MICROPOWER ULTRA-LOW QUIESCENT CURRENT VOLTAGE REGULATORS

Partnumber Manufacturer Quantity Availability
MC78LC40NTR ON, MOTO 487 In Stock

Description and Introduction

MICROPOWER ULTRA-LOW QUIESCENT CURRENT VOLTAGE REGULATORS **MC78LC40NTR: A Compact and Efficient Low-Dropout Voltage Regulator for Modern Electronics**  

In the ever-evolving landscape of electronic design, efficiency, reliability, and space-saving solutions are paramount. The **MC78LC40NTR** stands out as a high-performance, low-dropout (LDO) voltage regulator designed to meet the demands of today’s power-sensitive applications. With its compact form factor, low quiescent current, and robust performance, this component is an excellent choice for portable devices, IoT modules, and battery-powered systems.  

### **Key Features and Benefits**  

1. **Low Dropout Voltage**  
   The MC78LC40NTR operates with an impressively low dropout voltage, ensuring stable output even when the input voltage is only slightly higher than the regulated output. This feature is particularly valuable in battery-operated devices, where maximizing energy efficiency is critical.  

2. **Ultra-Low Quiescent Current**  
   With a quiescent current as low as 1.6 µA in standby mode, this LDO regulator minimizes power consumption, making it ideal for applications requiring long battery life. Whether used in wearables, medical devices, or wireless sensors, the MC78LC40NTR helps extend operational runtime.  

3. **Compact SOT-23 Package**  
   Housed in a space-saving **SOT-23-5** package, the MC78LC40NTR is designed for designs where board real estate is at a premium. Its small footprint allows for seamless integration into densely populated PCBs without compromising performance.  

4. **Wide Input Voltage Range**  
   Supporting an input voltage range of **2.0V to 12V**, this regulator offers flexibility across various power sources, including single-cell Li-ion batteries, supercapacitors, and regulated DC supplies.  

5. **Fixed and Adjustable Output Options**  
   The MC78LC40NTR is available in fixed output voltage versions (1.8V, 2.5V, 3.0V, 3.3V, 5.0V) as well as an adjustable variant, allowing designers to tailor the output to their specific needs with minimal external components.  

6. **Built-in Protection Features**  
   To enhance system reliability, the regulator includes **overcurrent protection (OCP)** and **thermal shutdown (TSD)**, safeguarding against potential damage from excessive current or overheating.  

### **Applications**  

The MC78LC40NTR is well-suited for a broad range of applications, including:  
- **Portable Electronics** – Smartphones, tablets, and handheld devices benefit from its low power consumption and small size.  
- **IoT and Wireless Sensors** – Its ultra-low quiescent current makes it ideal for always-on sensor nodes.  
- **Medical Devices** – Reliable voltage regulation is crucial in wearable health monitors and diagnostic equipment.  
- **Consumer Electronics** – Used in smart home devices, remote controls, and audio equipment for stable power delivery.  

### **Conclusion**  

Engineers seeking a dependable, energy-efficient voltage regulator will find the **MC78LC40NTR** to be a compelling solution. Its combination of low dropout voltage, minimal power consumption, and compact packaging makes it an excellent fit for modern electronic designs where efficiency and space constraints are key considerations. Whether powering next-generation IoT devices or extending battery life in portable gadgets, this LDO regulator delivers consistent performance in a small yet powerful package.  

For designers prioritizing reliability and efficiency, the MC78LC40NTR is a component worth integrating into their next project.

Application Scenarios & Design Considerations

MICROPOWER ULTRA-LOW QUIESCENT CURRENT VOLTAGE REGULATORS

Alternative Part Number

  • LP2980IM5-4.0 --: Low-dropout 4.0V linear regulator in SOT-23-5, similar current capability and pinout, widely available and often used as a direct substitute for the MC78LC series.
  • AP2138N-4.0 --: 4.0V CMOS LDO regulator in SOT-23 package with comparable dropout and quiescent current, suitable drop-in replacement for low-power 78LC applications.
  • S-1132B40-M5T1U --: 4.0V low-dropout regulator in SOT-23-5 with low quiescent current and stable ceramic-cap operation, matching the MC78LC40NTR's small-signal regulator role.
  • S-812C40AMC --: 4.0V CMOS LDO regulator with low quiescent current, suitable drop-in replacement for small-signal regulator applications.

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