3A, 4MHz, Monolithic Synchronous Step-Down Regulator The LTC3412AIUF#PBF is a high-efficiency, synchronous step-down DC/DC converter manufactured by **Linear Technology (now part of Analog Devices)**.
### **Specifications:**
- **Input Voltage Range:** 2.25V to 5.5V
- **Output Voltage Range:** 0.8V to 5V (adjustable via external resistors)
- **Maximum Output Current:** 4A
- **Switching Frequency:** 1MHz (fixed)
- **Efficiency:** Up to 95%
- **Operating Temperature Range:** -40°C to +125°C
- **Package:** 20-Lead QFN (4mm × 5mm)
- **Synchronous Rectification:** Yes
- **Low Dropout Operation:** 100% duty cycle
- **Quiescent Current:** 40µA (in Burst Mode operation)
- **Protection Features:** Overcurrent, overtemperature, and undervoltage lockout
### **Descriptions:**
The LTC3412AIUF#PBF is a high-performance, monolithic synchronous buck regulator designed for high-efficiency power conversion in portable and distributed power systems. It uses a constant-frequency, current-mode architecture for excellent line and load regulation.
### **Features:**
- **High Efficiency:** Up to 95% due to synchronous rectification.
- **Burst Mode® Operation:** Reduces quiescent current to 40µA for light loads.
- **Low Dropout:** Allows 100% duty cycle for extended battery life.
- **1MHz Switching Frequency:** Enables small external components.
- **Adjustable Output Voltage:** Set via external resistors.
- **Thermal Protection:** Prevents damage from overheating.
- **Short-Circuit Protection:** Includes cycle-by-cycle current limiting.
- **Synchronizable:** Can be synchronized to an external clock.
This device is commonly used in **battery-powered applications, portable devices, and point-of-load regulation**.
*(Note: Always refer to the latest datasheet for detailed specifications and application guidelines.)*
