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LM2577N-12 from NS,National Semiconductor

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LM2577N-12

Manufacturer: NS

SIMPLE SWITCHER Step-Up Voltage Regulator

Partnumber Manufacturer Quantity Availability
LM2577N-12,LM2577N12 NS 98 In Stock

Description and Introduction

SIMPLE SWITCHER Step-Up Voltage Regulator The LM2577N-12 is a switching voltage regulator manufactured by National Semiconductor (NS). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**
- **Output Voltage:** 12V (fixed)  
- **Output Current:** Up to 3A (with proper heat sinking)  
- **Input Voltage Range:** 3.5V to 40V  
- **Switching Frequency:** 52 kHz (typical)  
- **Efficiency:** Up to 80% (depending on input/output conditions)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package Type:** TO-220 (5-pin)  

### **Descriptions:**
- The LM2577N-12 is a step-up (boost), flyback, and forward converter switching regulator.  
- It includes a fixed-frequency oscillator (52 kHz) and an internal NPN switch rated for 3A.  
- Designed for simplicity, requiring minimal external components.  
- Suitable for battery-powered applications, power supplies, and DC-DC converters.  

### **Features:**
- **Fixed 12V Output Voltage**  
- **3A Switch Current Capability**  
- **Wide Input Voltage Range (3.5V to 40V)**  
- **Internal Frequency Compensation**  
- **Thermal Shutdown and Current Limit Protection**  
- **Low Standby Current (50 µA typical in shutdown mode)**  
- **Requires Only 4 External Components for Basic Operation**  

This information is based on the manufacturer's datasheet for the LM2577N-12.

Application Scenarios & Design Considerations

SIMPLE SWITCHER Step-Up Voltage Regulator
Partnumber Manufacturer Quantity Availability
LM2577N-12,LM2577N12 NSC 250 In Stock

Description and Introduction

SIMPLE SWITCHER Step-Up Voltage Regulator The LM2577N-12 is a switching regulator IC manufactured by National Semiconductor (NSC).  

### **Specifications:**  
- **Output Voltage:** Fixed 12V  
- **Output Current:** Up to 3A (with appropriate external components)  
- **Input Voltage Range:** 3.5V to 40V  
- **Switching Frequency:** 52 kHz (typical)  
- **Efficiency:** Up to 80% (depending on external components and load)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** TO-220 (5-pin)  

### **Descriptions:**  
- The LM2577N-12 is a step-up (boost), step-down (buck), and flyback switching regulator.  
- It includes a fixed-frequency oscillator, a high-current switch, and a feedback control circuit.  
- Designed for simplicity, requiring minimal external components.  

### **Features:**  
- **Fixed 12V Output** (no external feedback resistors needed)  
- **Wide Input Voltage Range** (3.5V to 40V)  
- **High Efficiency** (up to 80%)  
- **Internal Current Limiting & Thermal Shutdown**  
- **Low Standby Current** (50 µA typical in shutdown mode)  
- **Requires Only 4 External Components** (inductor, capacitor, diode, and input/output capacitors)  

This information is sourced from the manufacturer's datasheet.

Application Scenarios & Design Considerations

SIMPLE SWITCHER Step-Up Voltage Regulator

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