300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown The LT1521IS8-3#PBF is a low dropout (LDO) linear regulator manufactured by **Linear Technology (now part of Analog Devices)**.  

### **Specifications:**  
- **Output Voltage:** 3V (Fixed)  
- **Output Current:** 500mA  
- **Dropout Voltage:** 300mV (Typical) at 500mA  
- **Input Voltage Range:** 3.8V to 20V  
- **Line Regulation:** 0.02% (Typical)  
- **Load Regulation:** 0.05% (Typical)  
- **Quiescent Current:** 1mA (Typical)  
- **Package:** SO-8  
- **Operating Temperature Range:** -40°C to +125°C  
- **Protection Features:** Thermal Shutdown, Current Limit  

### **Descriptions:**  
The LT1521IS8-3#PBF is a high-performance LDO regulator designed for applications requiring stable, low-noise power. It features low dropout voltage, making it suitable for battery-powered systems.  

### **Features:**  
- Low Dropout Voltage (300mV at 500mA)  
- Low Quiescent Current  
- Stable with Low-ESR Capacitors  
- Thermal Shutdown Protection  
- Current Limit Protection  
- Fast Transient Response  

This regulator is commonly used in portable electronics, instrumentation, and industrial applications.

300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown