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LK112M40TR from STM,ST Microelectronics

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LK112M40TR

Manufacturer: STM, ST

LOW NOISE LOW DROP VOLTAGE REGULATOR WITH SHUTDOWN FUNCTION

Partnumber Manufacturer Quantity Availability
LK112M40TR STM, ST 3975 In Stock

Description and Introduction

LOW NOISE LOW DROP VOLTAGE REGULATOR WITH SHUTDOWN FUNCTION The **LK112M40TR** is a low-dropout (LDO) voltage regulator manufactured by **STMicroelectronics (ST)**. Below are its key specifications, descriptions, and features based on factual information:

### **Specifications:**  
- **Output Voltage:** 1.2V (fixed)  
- **Output Current:** 150mA  
- **Input Voltage Range:** 1.5V to 5.5V  
- **Dropout Voltage:** 120mV (typical at 100mA load)  
- **Quiescent Current:** 40µA (typical)  
- **Line Regulation:** 0.05%/V (typical)  
- **Load Regulation:** 0.4mV/mA (typical)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** SOT23-5L  

### **Descriptions:**  
- The **LK112M40TR** is a low-power LDO regulator designed for battery-powered applications.  
- It provides a stable 1.2V output with low dropout voltage, making it suitable for power-sensitive designs.  
- The device includes built-in protection features such as thermal shutdown and current limiting.  

### **Features:**  
- **Low Dropout Voltage:** Ensures efficient operation even with small input-output differentials.  
- **Low Quiescent Current:** Ideal for battery-operated devices to extend battery life.  
- **Stable with Low ESR Capacitors:** Works reliably with ceramic capacitors (≥1µF).  
- **Thermal Shutdown Protection:** Prevents damage from overheating.  
- **Current Limiting:** Protects against excessive load conditions.  
- **Small Form Factor:** SOT23-5L package for space-constrained applications.  

This information is sourced from STMicroelectronics' official documentation. For detailed technical data, refer to the **LK112M40TR datasheet**.

Application Scenarios & Design Considerations

LOW NOISE LOW DROP VOLTAGE REGULATOR WITH SHUTDOWN FUNCTION

Alternative Part Number

  • LP2985AIM5-4.0 --: Low-dropout linear regulator with 4.0V fixed output in SOT-23-5, similar current capability and pin-compatible footprint, widely available.
  • MIC5205-4.0YM5 --: 4.0V fixed LDO regulator in SOT-23-5 with low dropout and low quiescent current, a common drop-in style replacement for small LDOs.
  • AP2112K-4.0TRG1 --: 4.0V fixed LDO in SOT-23-5 with good stability and low dropout, suitable alternative when the original STM part is unavailable.

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