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LM3503SQ-35 from NS,National Semiconductor

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LM3503SQ-35

Manufacturer: NS

Dual-Display Constant Current LED Driver with Analog Brightness Control 16-WQFN -40 to 85

Partnumber Manufacturer Quantity Availability
LM3503SQ-35,LM3503SQ35 NS 650 In Stock

Description and Introduction

Dual-Display Constant Current LED Driver with Analog Brightness Control 16-WQFN -40 to 85 The LM3503SQ-35 is a switching regulator manufactured by National Semiconductor (NS). Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:

### **Specifications:**  
- **Input Voltage Range:** 2.7V to 5.5V  
- **Output Voltage:** 3.5V (fixed)  
- **Output Current:** Up to 600mA  
- **Switching Frequency:** 1.6MHz (typical)  
- **Efficiency:** Up to 95%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 10-pin LLP (Leadless Leadframe Package)  

### **Descriptions:**  
The LM3503SQ-35 is a step-down (buck) DC-DC converter designed for low-voltage, high-efficiency power conversion. It integrates a synchronous rectifier to minimize external component count and improve efficiency. The fixed 3.5V output makes it suitable for applications requiring a regulated supply from a Li-Ion battery or other low-voltage sources.  

### **Features:**  
- **Fixed 3.5V Output Voltage**  
- **Synchronous Rectification** for high efficiency  
- **1.6MHz Switching Frequency** allows for small external components  
- **Low Quiescent Current** (typically 30µA)  
- **Soft-Start** to limit inrush current  
- **Thermal Shutdown** and **Overcurrent Protection**  
- **Small Footprint** (10-pin LLP package)  

This information is strictly based on the manufacturer's datasheet and does not include any additional recommendations.

Application Scenarios & Design Considerations

Dual-Display Constant Current LED Driver with Analog Brightness Control 16-WQFN -40 to 85

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