Switched Capacitor Boost Regulator with High Impedance Output in Shutdown 12-DSBGA -30 to 85 The **LM2757TMX/NOPB** is a switching regulator manufactured by **National Semiconductor** (now part of Texas Instruments).  

### **Key Specifications:**  
- **Input Voltage Range:** 2.7V to 5.5V  
- **Output Voltage:** Adjustable (via external resistors)  
- **Output Current:** Up to 600mA  
- **Switching Frequency:** 1.6MHz (typical)  
- **Efficiency:** Up to 90%  
- **Package:** 10-Pin LLP (3mm x 3mm)  
- **Operating Temperature Range:** -40°C to +85°C  

### **Descriptions & Features:**  
- **Charge Pump DC/DC Converter:** Provides regulated output voltage from an input supply.  
- **Low Noise Operation:** Uses a constant-frequency switching architecture.  
- **Soft-Start Function:** Reduces inrush current during startup.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation under low input voltage conditions.  
- **Thermal Shutdown Protection:** Prevents damage from overheating.  
- **Adjustable Output:** Allows flexibility in setting the desired output voltage.  

This device is commonly used in **portable electronics, battery-powered systems, and LED drivers** due to its compact size and efficiency.  

(Source: National Semiconductor/Texas Instruments Datasheet)

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