Switched Capacitor Boost Regulator with High Impedance Output in Shutdown 12-DSBGA -30 to 85 The LM2757TM/NOPB is a switching regulator manufactured by National Semiconductor (NS).  

### **Specifications:**  
- **Input Voltage Range:** 2.7V to 5.5V  
- **Output Voltage:** Adjustable (via external resistors)  
- **Output Current:** Up to 100mA  
- **Switching Frequency:** 1.6MHz (typical)  
- **Efficiency:** Up to 85%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 10-Pin LLP (3mm x 3mm)  

### **Descriptions:**  
The LM2757TM/NOPB is a high-efficiency, fixed-frequency, step-down DC-DC converter designed for low-power applications. It integrates a power switch and synchronous rectifier, reducing external component count.  

### **Features:**  
- **Low Quiescent Current:** 17µA (typical)  
- **Synchronous Rectification:** Improves efficiency  
- **Adjustable Output Voltage:** Via external resistors  
- **Internal Soft-Start:** Reduces inrush current  
- **Thermal Shutdown Protection:** Prevents overheating  
- **Short-Circuit Protection:** Enhances reliability  

This device is commonly used in portable electronics, battery-powered systems, and other low-power applications requiring efficient voltage conversion.  

(Source: National Semiconductor Datasheet)

Switched Capacitor Boost Regulator with High Impedance Output in Shutdown 12-DSBGA -30 to 85