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LM2577S-ADJ from NS,National Semiconductor

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LM2577S-ADJ

Manufacturer: NS

SIMPLE SWITCHER Step-Up Voltage Regulator

Partnumber Manufacturer Quantity Availability
LM2577S-ADJ,LM2577SADJ NS 1407 In Stock

Description and Introduction

SIMPLE SWITCHER Step-Up Voltage Regulator The LM2577S-ADJ is a switching regulator IC manufactured by National Semiconductor (NS). Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 3.5V to 40V  
- **Adjustable Output Voltage:** 1.23V to 40V (set by external resistors)  
- **Output Current:** Up to 3A (with proper heat sinking)  
- **Switching Frequency:** 52 kHz (fixed)  
- **Efficiency:** Up to 80%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** TO-263 (D2PAK-5)  

### **Descriptions:**  
- The LM2577S-ADJ is a step-up (boost), step-down (buck), flyback, or forward converter switching regulator.  
- It includes an adjustable output voltage feature, allowing flexibility in design.  
- The device integrates a fixed-frequency oscillator, high-current switch, and feedback control circuitry.  

### **Features:**  
- **Adjustable Output Voltage** (via external resistors)  
- **Wide Input Voltage Range** (3.5V to 40V)  
- **High Efficiency** (up to 80%)  
- **Internal Current Limiting and Thermal Shutdown**  
- **Minimal External Components Required**  
- **52 kHz Fixed-Frequency Oscillator** (reduces noise interference)  
- **Suitable for Battery-Powered Applications**  

This information is based on the manufacturer's datasheet.

Application Scenarios & Design Considerations

SIMPLE SWITCHER Step-Up Voltage Regulator

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