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IR3621F from IR,International Rectifier

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IR3621F

Manufacturer: IR, IOR

2-Phase Dual Synchronous PWM Controller with Oscillator Synchronization and Pre-Bias Startup

Partnumber Manufacturer Quantity Availability
IR3621F IR, IOR 121 In Stock

Description and Introduction

2-Phase Dual Synchronous PWM Controller with Oscillator Synchronization and Pre-Bias Startup The IR3621F is a synchronous buck PWM controller manufactured by International Rectifier (IR). Below are the factual details about its specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 4.5V to 24V  
- **Output Voltage Range:** Adjustable down to 0.8V  
- **Switching Frequency:** 300 kHz to 1 MHz (adjustable)  
- **Output Current:** Supports high current with external MOSFETs  
- **Efficiency:** Up to 95%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** 16-lead SOIC  

### **Descriptions:**  
The IR3621F is a high-performance synchronous buck PWM controller designed for DC-DC voltage regulation applications. It provides precise voltage regulation and supports high-efficiency power conversion with adjustable switching frequency.  

### **Features:**  
- **Adjustable Frequency:** 300 kHz to 1 MHz for optimized performance.  
- **Integrated Drivers:** Supports N-channel MOSFETs for synchronous rectification.  
- **Programmable Soft-Start:** Reduces inrush current during startup.  
- **Overcurrent Protection:** Prevents damage from excessive load conditions.  
- **Under-Voltage Lockout (UVLO):** Ensures proper operation within voltage limits.  
- **Power Good Indicator:** Monitors output voltage status.  
- **Thermal Shutdown:** Protects against overheating.  

These details are based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

2-Phase Dual Synchronous PWM Controller with Oscillator Synchronization and Pre-Bias Startup

Alternative Part Number

  • LTC3728L --: Dual synchronous step-down controller with similar function and pinout concept, widely used as a drop-in class replacement for IR3621F.
  • ISL8120 --: Dual-channel synchronous buck controller with comparable voltage mode architecture and current sensing, suitable for the same POL applications.
  • TPS40132 --: Single/dual-phase synchronous buck controller offering similar input range and gate drive, usable as a functional substitute with minor layout changes.
  • TPS40170RGYR --: Single-channel synchronous buck controller with similar input voltage range and gate drive capability, widely available and well documented.
  • LTC3851AEGN --: Synchronous step-down controller with comparable current-mode architecture and MOSFET drive, suitable as a functional substitute.
  • ISL6545ACBZ --: Single-phase synchronous buck PWM controller with similar control scheme and voltage range, offering a close functional match.

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