Micropower Low Dropout Regulators with Shutdown The LT1121CS8-5#PBF is a low dropout (LDO) linear regulator manufactured by Linear Technology (now part of Analog Devices). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Output Voltage:** Fixed 5V
- **Output Current:** 150mA
- **Dropout Voltage:** 300mV (typical at full load)
- **Input Voltage Range:** Up to 30V
- **Quiescent Current:** 1.1mA (typical)
- **Line Regulation:** 0.02%/V (typical)
- **Load Regulation:** 0.05%/mA (typical)
- **Operating Temperature Range:** 0°C to 125°C
- **Package:** 8-Lead SOIC (SO-8)

### **Descriptions:**
- The LT1121 is a low dropout regulator designed for applications requiring stable voltage regulation with minimal input-to-output differential.
- It includes reverse-battery protection, current limiting, and thermal shutdown for enhanced reliability.
- Suitable for battery-powered systems, portable devices, and industrial applications.

### **Features:**
- **Low Dropout Voltage:** Ensures efficient operation even with small input-output differentials.
- **Wide Input Voltage Range:** Supports up to 30V input.
- **Low Quiescent Current:** Reduces power consumption in standby mode.
- **Reverse-Battery Protection:** Safeguards the regulator from damage due to incorrect polarity.
- **Thermal Shutdown & Current Limit:** Protects against overheating and overcurrent conditions.
- **Stable with Low-ESR Capacitors:** Works reliably with ceramic or tantalum output capacitors.

This regulator is designed for applications requiring precision voltage regulation with robust protection features.

Micropower Low Dropout Regulators with Shutdown