Low IQ Synchronous Step-Down Controller The LTC3835IUFD#PBF is a high-efficiency, dual-output synchronous step-down DC/DC controller manufactured by Linear Technology (now part of Analog Devices).
### **Specifications:**
- **Input Voltage Range:** 4.5V to 38V
- **Output Voltage Range:** 0.6V to 5.5V (adjustable)
- **Switching Frequency:** 200kHz to 2MHz (adjustable)
- **Maximum Output Current:** Up to 25A per phase (with external MOSFETs)
- **Efficiency:** Up to 95%
- **Operating Temperature Range:** -40°C to 125°C
- **Package:** 28-Lead QFN (5mm x 5mm)
- **Features:**
- Dual-output or single-output with current sharing
- Programmable soft-start
- Power-good indicators
- Adjustable current limit
- Differential remote sensing
- Phase-lockable frequency (PLL)
### **Descriptions:**
The LTC3835IUFD#PBF is designed for high-power applications requiring precise voltage regulation. It supports dual-phase operation for improved thermal performance and efficiency. The controller drives external N-channel MOSFETs and includes features like adjustable frequency, current-mode control, and fault protection.
### **Features:**
- **Dual-Output or Single-Output Operation:** Configurable for independent or current-sharing outputs.
- **Adjustable Frequency:** Allows optimization for efficiency and component size.
- **Current-Mode Control:** Ensures fast transient response and stable operation.
- **Programmable Soft-Start:** Prevents inrush current at startup.
- **Power-Good Indicators:** Monitors output status.
- **Differential Remote Sensing:** Compensates for voltage drops in PCB traces.
- **Phase-Lockable Oscillator:** Synchronizes with an external clock.
- **Thermal Protection:** Prevents overheating.
This controller is suitable for applications such as telecom, industrial power supplies, and high-performance computing.
(Source: Linear Technology/Analog Devices Datasheet)
