The SM8131B is a charge pump DC/DC converter that switches between 1 and 1.5 automatically. The part **SM8131B00B** is manufactured by **NPC (New Japan Radio Co., Ltd.)**.  

### **Specifications:**  
- **Type:** Switching Regulator IC  
- **Function:** Step-Down DC/DC Converter  
- **Input Voltage Range:** 4.5V to 18V  
- **Output Voltage:** Adjustable (typically 0.8V to 16V)  
- **Output Current:** Up to 3A  
- **Switching Frequency:** 300kHz (typical)  
- **Efficiency:** High efficiency (up to 95%)  
- **Package:** HSOP-8 (Exposed Pad)  
- **Protection Features:** Overcurrent protection (OCP), thermal shutdown (TSD), and undervoltage lockout (UVLO)  

### **Descriptions and Features:**  
- **Compact and Efficient Design:** Suitable for space-constrained applications.  
- **Adjustable Output:** Allows flexibility in voltage settings.  
- **High Current Capability:** Supports up to 3A output current.  
- **Wide Input Voltage Range:** Compatible with various power sources.  
- **Built-in Protection:** Enhances reliability with OCP, TSD, and UVLO.  
- **Low Dropout Operation:** Maintains stable output even with low input voltage.  

This part is commonly used in power supply circuits for consumer electronics, industrial equipment, and automotive applications.

The SM8131B is a charge pump DC/DC converter that switches between 1 and 1.5 automatically.