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LM5642XMTX from NSC,National Semiconductor

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LM5642XMTX

Manufacturer: NSC

LM5642/LM5642X High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization

Partnumber Manufacturer Quantity Availability
LM5642XMTX NSC 375 In Stock

Description and Introduction

LM5642/LM5642X High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization The LM5642XMTX is a dual synchronous buck controller manufactured by National Semiconductor (NSC). Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:

### **Specifications:**
- **Input Voltage Range:** 4.5V to 36V  
- **Output Voltage Range:** Adjustable down to 0.6V  
- **Switching Frequency:** Adjustable from 50kHz to 1MHz  
- **Output Current:** Supports high-current applications (dependent on external components)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package Type:** 16-Pin TSSOP  

### **Descriptions:**
The LM5642XMTX is a high-efficiency, dual synchronous buck controller designed for power supply applications. It provides precise regulation for two independent output voltages, making it suitable for multi-rail power systems. The device integrates features for soft-start, current limiting, and thermal protection to ensure reliable operation.

### **Features:**
- **Dual Output Control:** Independently regulates two output voltages.  
- **Adjustable Switching Frequency:** Allows optimization for efficiency and component size.  
- **Synchronous Rectification:** Improves efficiency by reducing power loss.  
- **Soft-Start Function:** Prevents inrush current at startup.  
- **Cycle-by-Cycle Current Limiting:** Protects against overcurrent conditions.  
- **Thermal Shutdown:** Prevents damage from excessive heat.  
- **Adjustable Output Voltage:** Set via external resistors.  
- **Wide Input Voltage Range:** Supports various power sources.  

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

Application Scenarios & Design Considerations

LM5642/LM5642X High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization
Partnumber Manufacturer Quantity Availability
LM5642XMTX NS 202 In Stock

Description and Introduction

LM5642/LM5642X High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization The LM5642XMTX is a dual synchronous buck controller manufactured by Texas Instruments (NS).  

### **Specifications:**  
- **Input Voltage Range:** 4.5V to 36V  
- **Output Voltage Range:** Adjustable down to 0.6V  
- **Switching Frequency:** Adjustable from 50kHz to 1MHz  
- **Dual Output Channels:** Two independent synchronous buck controllers  
- **Current Mode Control:** Ensures stable operation  
- **Synchronization Capability:** Can sync to an external clock  
- **Efficiency Optimization:** Supports diode emulation for light loads  
- **Protection Features:** Overvoltage, undervoltage, and thermal shutdown  
- **Package:** 16-pin TSSOP  

### **Descriptions and Features:**  
- Designed for high-efficiency DC-DC conversion in applications like telecom, industrial, and automotive systems.  
- Supports adjustable soft-start for controlled power-up sequencing.  
- Includes integrated high-side and low-side MOSFET drivers.  
- Operates in either forced PWM or diode emulation mode for improved efficiency.  
- Provides precise voltage regulation with feedback accuracy.  

For detailed electrical characteristics, refer to the official Texas Instruments datasheet.

Application Scenarios & Design Considerations

LM5642/LM5642X High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization
Partnumber Manufacturer Quantity Availability
LM5642XMTX NS,NS 9740 In Stock

Description and Introduction

LM5642/LM5642X High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization The LM5642XMTX is a dual synchronous buck controller manufactured by National Semiconductor (NS).  

### **Specifications:**  
- **Input Voltage Range:** 4.5V to 36V  
- **Output Voltage Range:** 0.8V to 5.5V (adjustable)  
- **Switching Frequency:** Adjustable from 50kHz to 1MHz  
- **Dual Output Configuration:** Two independent synchronous buck regulators  
- **Efficiency:** Up to 95%  
- **Current Mode Control:** Ensures stable operation  
- **Soft-Start Function:** Reduces inrush current  
- **Thermal Shutdown Protection:** Prevents overheating  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** 16-pin TSSOP  

### **Descriptions and Features:**  
- Designed for high-efficiency DC-DC conversion in power supply applications.  
- Supports adjustable output voltage via external resistors.  
- Includes cycle-by-cycle current limiting for overcurrent protection.  
- Synchronizable to an external clock for noise-sensitive applications.  
- Integrated MOSFET drivers reduce external component count.  
- Suitable for industrial, automotive, and telecom power systems.  

This information is based on the manufacturer's datasheet. For detailed application notes, refer to the official documentation.

Application Scenarios & Design Considerations

LM5642/LM5642X High Voltage, Dual Synchronous Buck Converter with Oscillator Synchronization

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