150mA Ultra Low Dropout Regulator with Low Noise Bypass Here are the factual details about the part **SC1453ISK-1.8TR** from the manufacturer **SEMTECH**:

### **Specifications:**
- **Manufacturer:** SEMTECH  
- **Part Number:** SC1453ISK-1.8TR  
- **Type:** Voltage Regulator (LDO - Low Dropout)  
- **Output Voltage:** 1.8V  
- **Output Current:** Up to 300mA  
- **Input Voltage Range:** 2.5V to 5.5V  
- **Dropout Voltage:** Typically 200mV at full load  
- **Package:** SOT-23-5  
- **Operating Temperature Range:** -40°C to +85°C  
- **Quiescent Current:** Typically 45µA  
- **Line Regulation:** ±0.05% typical  
- **Load Regulation:** ±0.1% typical  
- **Features:** Low noise, high PSRR (Power Supply Rejection Ratio)  

### **Descriptions and Features:**
- **Low Dropout (LDO) Regulator:** Designed for stable 1.8V output with minimal voltage drop.  
- **Low Quiescent Current:** Optimized for battery-powered applications.  
- **High PSRR:** Ensures clean output voltage even with noisy input sources.  
- **Thermal Shutdown & Current Limit Protection:** Protects against overheating and overcurrent conditions.  
- **Small Form Factor:** SOT-23-5 package suitable for space-constrained designs.  
- **Applications:** Portable electronics, IoT devices, battery-powered systems, and noise-sensitive circuits.  

Let me know if you need any additional details.