800mA Low Dropout Fast Response Positive Adjustable Regulator and Fixed 1.8V, 2.5V and 3.3V The manufacturer of part APL1087-25DC-TR is ANPEC.  

**Specifications:**  
- **Output Voltage:** 2.5V  
- **Output Current:** 3A  
- **Input Voltage Range:** 4.5V to 18V  
- **Switching Frequency:** 340kHz  
- **Efficiency:** Up to 95%  
- **Package:** SOP-8  
- **Operating Temperature Range:** -40°C to +85°C  
- **Features:**  
  - Adjustable soft-start  
  - Over-current protection  
  - Thermal shutdown  
  - Under-voltage lockout (UVLO)  

This information is based on the available knowledge base. For detailed specifications, refer to the official ANPEC datasheet.

800mA Low Dropout Fast Response Positive Adjustable Regulator and Fixed 1.8V, 2.5V and 3.3V The part **APL1087-25DC-TR** is a **DC-DC converter** manufactured by **Advanced Power Electronics Corp (APEC)**.  

### Key Specifications:  
- **Input Voltage Range:** 4.5V to 18V  
- **Output Voltage:** 2.5V (fixed)  
- **Output Current:** 3A (max)  
- **Efficiency:** Up to 95%  
- **Switching Frequency:** 500kHz  
- **Package:** SOP-8 (EP)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Features:** Overcurrent protection, thermal shutdown, and adjustable soft-start  

This is a **step-down (buck) converter** designed for compact power supply applications.  

Let me know if you need further details.