Micropower Low Dropout Regulators with Shutdown The LT1129CST-5#PBF is a low dropout (LDO) voltage regulator manufactured by Linear Technology (now part of Analog Devices).  

### **Specifications:**  
- **Output Voltage:** 5V (fixed)  
- **Output Current:** 700mA  
- **Dropout Voltage:** 300mV (typical at full load)  
- **Input Voltage Range:** Up to 30V  
- **Line Regulation:** 0.0005%/V (typical)  
- **Load Regulation:** 0.015% (typical)  
- **Quiescent Current:** 1.1mA (typical)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** SOT-223 (4-Lead)  
- **Protection Features:** Thermal shutdown, current limit  

### **Descriptions & Features:**  
- **Low Dropout:** Operates with very low input-output differential voltage.  
- **High Accuracy:** Tight output voltage tolerance (±2% over line, load, and temperature).  
- **Low Noise:** Optimized for noise-sensitive applications.  
- **Wide Input Voltage Range:** Supports up to 30V input.  
- **Thermal Protection:** Built-in thermal shutdown prevents damage from overheating.  
- **Current Limiting:** Protects the regulator and load from excessive current.  
- **Stable with Low-ESR Capacitors:** Works with ceramic or tantalum output capacitors.  

This regulator is commonly used in battery-powered devices, instrumentation, and industrial applications requiring stable, low-noise power.

Micropower Low Dropout Regulators with Shutdown