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L4989MD from ST,ST Microelectronics

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L4989MD

Manufacturer: ST, STM

Low power voltage regulator

Partnumber Manufacturer Quantity Availability
L4989MD ST, STM 98 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

Alternative Part Number

  • UC3842BD1 --: Industry-standard current-mode PWM controller in SO-8, widely used as a functional substitute for SMPS control ICs like the L4989MD; different series naming makes it easy to distinguish.
  • NCP1252ADR2G --: Current-mode PWM controller with comparable control-loop features and SO-8 package, suitable as a cross-manufacturer alternative for offline power supply designs.
  • ICE3BR0665J --: Integrated offline PWM controller with built-in protection features, offering a different series and manufacturer as a feasible replacement in similar power conversion applications.
  • UCC28070D --: Interleaved PFC controller in SOIC package, functionally comparable to the L4989 PFC controller and widely available.
  • NCP1654BD65R2G --: Continuous conduction mode PFC controller with similar control scheme and SOIC footprint, suitable as a drop-in style replacement.
  • ICE3PCS01G --: CCM PFC controller offering comparable functionality and package compatibility for power factor correction designs.

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