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LM3509SD from NS,National Semiconductor

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LM3509SD

Manufacturer: NS

OLED Displays with Dual Current Sinks and I2C Compatible Brightness Control

Partnumber Manufacturer Quantity Availability
LM3509SD NS 4500 In Stock

Description and Introduction

OLED Displays with Dual Current Sinks and I2C Compatible Brightness Control The LM3509SD is a switching regulator manufactured by National Semiconductor (NS). Below are the factual details about its specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 2.7V to 5.5V  
- **Output Voltage:** Adjustable (via external resistors)  
- **Switching Frequency:** 1.6MHz (typical)  
- **Output Current:** Up to 600mA  
- **Efficiency:** Up to 95%  
- **Package:** 10-Pin LLP (3mm x 3mm)  

### **Descriptions:**  
The LM3509SD is a high-efficiency, step-up DC-DC converter designed for low-power applications. It integrates a synchronous rectifier to minimize external components and improve efficiency. The device is optimized for battery-powered systems, such as portable electronics and LED drivers.

### **Features:**  
- **Synchronous Rectification:** Improves efficiency and reduces power loss.  
- **Adjustable Output Voltage:** Configurable via external resistors.  
- **Low Quiescent Current:** Typically 16µA in shutdown mode.  
- **Soft-Start Function:** Prevents inrush current at startup.  
- **Thermal Shutdown Protection:** Safeguards against overheating.  
- **Current Limiting:** Protects the device from excessive load conditions.  

This information is based on the manufacturer's datasheet for the LM3509SD.

Application Scenarios & Design Considerations

OLED Displays with Dual Current Sinks and I2C Compatible Brightness Control

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