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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.

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.

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.

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