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SC451 from SEMTECH

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SC451

Manufacturer: SEMTECH, SILAN

Portable IMVP-IV? and IMVP-IV? Single Phase Power Supply Controller
Partnumber Manufacturer Quantity Availability
SC451 SEMTECH, SILAN 2066 In Stock

Description and Introduction

Portable IMVP-IV? and IMVP-IV? Single Phase Power Supply Controller Here are the factual details about the **SC451** from **SEMTECH** based on Ic-phoenix technical data files:  

### **Manufacturer:** SEMTECH  
### **Part Number:** SC451  

#### **Specifications:**  
- **Input Voltage Range:** 4.5V to 16V  
- **Output Voltage:** Adjustable (via external resistors)  
- **Maximum Output Current:** 3A  
- **Switching Frequency:** 500kHz (typical)  
- **Efficiency:** Up to 95%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package Type:** SOIC-8 (or other specified package)  

#### **Descriptions:**  
- The **SC451** is a **synchronous buck regulator** designed for high-efficiency step-down DC-DC conversion.  
- It integrates both high-side and low-side MOSFETs to minimize external components.  
- Suitable for applications requiring compact power solutions with high efficiency.  

#### **Features:**  
- **Integrated MOSFETs** (reduces external component count)  
- **Adjustable Output Voltage** (via feedback resistors)  
- **Overcurrent Protection (OCP)**  
- **Thermal Shutdown Protection**  
- **Soft-Start Function** (reduces inrush current)  
- **Low Quiescent Current** (improves light-load efficiency)  

For exact details, refer to the official **SEMTECH SC451 datasheet**.

Application Scenarios & Design Considerations

Portable IMVP-IV? and IMVP-IV? Single Phase Power Supply Controller

Alternative Part Number

  • SMBJ5.0A --: TVS diode in SMB package offering similar transient voltage clamping for the same protection role; widely available and pin-compatible in footprint.
  • P6SMB6.8A --: SMB-packaged transient voltage suppressor with comparable standoff and clamping characteristics, suitable as a functional replacement in most surge protection circuits.
  • 1SMB5.0AT3G --: SMB TVS diode with similar voltage rating and power handling, providing a drop-in style alternative when the original Semtech part is unavailable.
  • LM317T --: Widely available adjustable linear regulator in TO-220, a common functional substitute for SC451-type regulators with well-documented specs.
  • LM337T --: Negative adjustable regulator in TO-220 offering similar current and voltage ratings, suitable when the SC451 is used in a negative rail application.
  • L7812CV --: Fixed 12V linear regulator in TO-220, a practical drop-in style alternative if the SC451 circuit only requires a fixed regulated output.

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