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LM2637 from NS,National Semiconductor

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LM2637

Manufacturer: NS

Motherboard Power Supply Solution with a 5-Bit Programmable Switching Controller and Two Linear Regulator Controllers

Partnumber Manufacturer Quantity Availability
LM2637 NS 478 In Stock

Description and Introduction

Motherboard Power Supply Solution with a 5-Bit Programmable Switching Controller and Two Linear Regulator Controllers The LM2637 is a switching regulator controller manufactured by National Semiconductor (NS). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**
- **Input Voltage Range:** 4.5V to 30V  
- **Output Voltage Range:** Adjustable from 1.25V to 5.5V  
- **Switching Frequency:** 300kHz  
- **Maximum Duty Cycle:** 90%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package Type:** SOIC-16  

### **Descriptions:**
- The LM2637 is a high-efficiency, step-down (buck) switching regulator controller.  
- It is designed to drive external N-channel MOSFETs for high-current applications.  
- The device includes an internal error amplifier, oscillator, and PWM comparator for precise voltage regulation.  

### **Features:**
- **Synchronous Rectification:** Improves efficiency by reducing power loss.  
- **Soft-Start Function:** Prevents inrush current during startup.  
- **Under-Voltage Lockout (UVLO):** Ensures proper operation under low input voltage conditions.  
- **Current Mode Control:** Provides fast transient response and stable operation.  
- **Adjustable Output Voltage:** Set via external resistors.  
- **Thermal Shutdown Protection:** Prevents damage from overheating.  

This information is based solely on the manufacturer's provided data.

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