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L4989MD from ST,ST Microelectronics

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L4989MD

Manufacturer: ST

Low power voltage regulator

Partnumber Manufacturer Quantity Availability
L4989MD ST 50 In Stock

Description and Introduction

Low power voltage regulator The L4989MD is a power factor correction (PFC) controller manufactured by STMicroelectronics. Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:  

### **Manufacturer:** STMicroelectronics  
### **Part Number:** L4989MD  

### **Description:**  
The L4989MD is a high-voltage startup PFC controller designed for transition-mode (boundary conduction mode) power factor correction in AC-DC converters. It integrates a high-voltage startup circuit, reducing external component count and simplifying design.  

### **Key Features:**  
- **Input Voltage Range:** Up to 600V (high-voltage startup)  
- **Output Voltage Regulation:** Adjustable via external feedback  
- **Transition-Mode Operation:** Ensures high efficiency and low EMI  
- **Integrated High-Voltage Startup:** Eliminates the need for an external startup circuit  
- **Precision Reference Voltage:** 2.5V ±1%  
- **Overvoltage Protection (OVP):** Safeguards against output overvoltage  
- **Undervoltage Lockout (UVLO):** Ensures proper startup and shutdown  
- **Soft-Start Function:** Reduces inrush current  
- **Low Operating Current:** Optimized for energy efficiency  
- **Totem Pole Output:** Capable of driving a power MOSFET or IGBT  
- **Package:** SO-16 (wide-body)  

### **Applications:**  
- AC-DC power supplies  
- LED lighting drivers  
- Industrial power systems  
- Consumer electronics  

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 power voltage regulator
Partnumber Manufacturer Quantity Availability
L4989MD STM 48 In Stock

Description and Introduction

Low power voltage regulator The L4989MD is a high-voltage monolithic switching regulator from STMicroelectronics (STM). It is designed for offline flyback converters and operates in current mode.  

### **Specifications:**  
- **Input Voltage Range:** Up to 600V  
- **Output Power:** Up to 15W in isolated flyback configurations  
- **Switching Frequency:** Adjustable up to 300kHz  
- **Operating Mode:** Current-mode control  
- **Start-up Current:** < 100µA  
- **Quiescent Current:** < 3mA  
- **Protection Features:**  
  - Overvoltage protection (OVP)  
  - Overcurrent protection (OCP)  
  - Thermal shutdown  
  - Undervoltage lockout (UVLO)  
- **Package:** SO-8  

### **Description:**  
The L4989MD is optimized for low-power offline flyback converters, offering high efficiency and reliability. It integrates a high-voltage startup circuit, reducing external component count.  

### **Features:**  
- **High-Voltage Startup:** Eliminates the need for an auxiliary winding or external startup circuit.  
- **Adjustable Frequency:** Allows optimization for efficiency and EMI performance.  
- **Soft-Start:** Reduces inrush current during startup.  
- **Current Sensing:** Internal leading-edge blanking improves noise immunity.  
- **Low Power Consumption:** Enhances efficiency in standby mode.  

This information is based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

Low power voltage regulator

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