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LM2574-3.3BN from MICREL

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LM2574-3.3BN

Manufacturer: MICREL

52kHz Simple 0.5A Buck Regulator

Partnumber Manufacturer Quantity Availability
LM2574-3.3BN,LM257433BN MICREL 450 In Stock

Description and Introduction

52kHz Simple 0.5A Buck Regulator The LM2574-3.3BN is a step-down (buck) switching voltage regulator manufactured by **MICREL** (now part of Microchip Technology).  

### **Specifications:**  
- **Output Voltage:** 3.3V (fixed)  
- **Input Voltage Range:** 4.5V to 40V  
- **Output Current:** 0.5A (max)  
- **Switching Frequency:** 52kHz (typical)  
- **Efficiency:** Up to 80%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** 8-Pin DIP (PDIP)  
- **Regulation Type:** PWM (Pulse Width Modulation)  
- **Protection Features:** Thermal shutdown, current limiting  

### **Descriptions:**  
The LM2574-3.3BN is a monolithic integrated circuit that provides all active functions for a step-down (buck) switching regulator. It is designed for easy implementation in applications requiring efficient voltage regulation.  

### **Features:**  
- Simple and easy-to-use design  
- Requires minimal external components  
- Internal frequency compensation  
- Fixed-frequency oscillator  
- Low standby current (50µA typical in shutdown mode)  
- Soft-start capability (reduces inrush current)  
- Available in fixed and adjustable output versions  

This regulator is commonly used in power supply designs for industrial, automotive, and consumer electronics applications.

Partnumber Manufacturer Quantity Availability
LM2574-3.3BN,LM257433BN MICREL 50 In Stock

Description and Introduction

52kHz Simple 0.5A Buck Regulator The LM2574-3.3BN is a switching voltage regulator manufactured by MICREL (now part of Microchip Technology). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Output Voltage:** 3.3V (fixed)  
- **Input Voltage Range:** 4.5V to 40V  
- **Output Current:** Up to 0.5A  
- **Switching Frequency:** 52 kHz (typical)  
- **Efficiency:** Up to 80%  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** 8-pin DIP (Dual In-line Package)  

### **Descriptions:**
The LM2574-3.3BN is a step-down (buck) switching regulator that provides a fixed 3.3V output. It is designed for simplicity and ease of use, requiring minimal external components. The regulator is suitable for applications requiring moderate current with high efficiency and low power dissipation.

### **Features:**
- **Fixed 3.3V Output Voltage**  
- **Wide Input Voltage Range (4.5V to 40V)**  
- **Low Power Consumption in Standby Mode**  
- **Internal Frequency Compensation**  
- **Thermal Shutdown and Current Limiting Protection**  
- **Requires Only 4 External Components**  
- **Available in Through-Hole (DIP) Package**  

This regulator is commonly used in power supply designs for industrial, automotive, and consumer electronics applications.

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