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LM5008MM from NS,National Semiconductor

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LM5008MM

Manufacturer: NS, NSC

High Voltage (100V) Step Down Switching Regulator

Partnumber Manufacturer Quantity Availability
LM5008MM NS, NSC 1803 In Stock

Description and Introduction

High Voltage (100V) Step Down Switching Regulator The LM5008MM is a high-voltage switching regulator manufactured by National Semiconductor (NSC). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**
- **Input Voltage Range:** 7.5V to 75V  
- **Output Voltage Range:** Adjustable from 1.25V to 70V  
- **Output Current:** Up to 500mA  
- **Switching Frequency:** Adjustable up to 1MHz  
- **Efficiency:** Up to 90%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** 8-pin SOIC (MM)  

### **Descriptions:**
- The LM5008MM is a monolithic high-voltage switching regulator designed for step-down (buck) applications.  
- It integrates a 75V N-channel MOSFET and a high-voltage startup regulator.  
- The device is optimized for high efficiency and low power dissipation.  
- It includes features like thermal shutdown, current limiting, and an adjustable soft-start.  

### **Features:**
- **Wide Input Voltage Range:** 7.5V to 75V  
- **Integrated High-Side MOSFET:** Reduces external component count.  
- **Adjustable Output Voltage:** Set via external resistors.  
- **Programmable Switching Frequency:** Up to 1MHz for optimized efficiency.  
- **Soft-Start Function:** Prevents inrush current at startup.  
- **Thermal Shutdown Protection:** Prevents overheating.  
- **Current Limiting:** Protects against overloads.  
- **Low Quiescent Current:** Improves efficiency at light loads.  

This information is strictly based on the manufacturer's datasheet for the LM5008MM.

Application Scenarios & Design Considerations

High Voltage (100V) Step Down Switching Regulator

Alternative Part Number

  • TPS54040DGQR --: Wide-Vin (3.5V-42V) 0.5A step-down converter in the same class as the LM5008; TI is the successor to National Semiconductor, so it is a direct functional replacement with similar current rating and package options.
  • LMR14030SDDAR --: 3A 40V SIMPLE SWITCHER buck regulator from TI's LMR series; higher current margin than the LM5008 and pin-compatible in many designs, offering a robust drop-in style alternative.
  • MP4560DN-LF-Z --: 2A 55V step-down converter in SOIC-8 with integrated switch, comparable input voltage range and switching behavior, providing a second-source option from a different vendor family.
  • MP4560DN --: 55V, 2A step-down converter with integrated switch, suitable alternative when higher input voltage margin is needed.

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