300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown The LT1521CMS8-3 is a low dropout (LDO) linear regulator manufactured by Linear Technology (now part of Analog Devices).  

### **Specifications:**  
- **Output Voltage:** 3V (fixed)  
- **Output Current:** 150mA  
- **Dropout Voltage:** 300mV (typical) at 150mA load  
- **Input Voltage Range:** 3.8V to 20V  
- **Quiescent Current:** 1mA (typical)  
- **Line Regulation:** 0.03% (typical)  
- **Load Regulation:** 0.05% (typical)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** 8-Lead MSOP  

### **Descriptions and Features:**  
- **Low Dropout Voltage:** Ensures stable output even with small input-output differentials.  
- **Low Quiescent Current:** Reduces power consumption in battery-operated applications.  
- **Thermal Shutdown Protection:** Prevents damage due to overheating.  
- **Reverse Battery Protection:** Safeguards against incorrect polarity connection.  
- **Low Output Noise:** Suitable for noise-sensitive applications.  
- **Stable with Low-ESR Capacitors:** Works with ceramic or tantalum capacitors.  
- **Applications:** Battery-powered devices, portable electronics, and precision voltage regulation.  

The LT1521CMS8-3 is designed for high-performance voltage regulation with robust protection features.

300mA Low Dropout Regulators with Micropower Quiescent Current and Shutdown