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LTC3857IUH#PBF from LINEAR

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LTC3857IUH#PBF

Manufacturer: LINEAR

Low IQ, Dual, 2-Phase Synchronous Step-Down Controller

Partnumber Manufacturer Quantity Availability
LTC3857IUH#PBF,LTC3857IUHPBF LINEAR 52 In Stock

Description and Introduction

Low IQ, Dual, 2-Phase Synchronous Step-Down Controller The LTC3857IUH#PBF is a synchronous step-down switching regulator controller manufactured by Linear Technology (now part of Analog Devices).  

### **Specifications:**  
- **Input Voltage Range:** 4.5V to 38V  
- **Output Voltage Range:** 0.8V to 5.5V  
- **Switching Frequency:** 50kHz to 900kHz (programmable)  
- **Maximum Duty Cycle:** 100%  
- **Operating Temperature Range:** -40°C to 125°C  
- **Package:** 32-Lead QFN (5mm x 5mm)  
- **Topology:** Current Mode Control  
- **Phase-Lockable Frequency Range:** 75kHz to 850kHz  
- **Current Sense:** Differential or Inductor DCR Sensing  

### **Descriptions:**  
The LTC3857 is a high-performance, dual-output synchronous buck controller designed for high-efficiency power conversion. It features a wide input voltage range, making it suitable for automotive, industrial, and telecom applications. The device supports multi-phase operation for higher current applications and includes adjustable current limiting and soft-start.  

### **Features:**  
- **Dual Outputs:** Independent control for two synchronous buck regulators.  
- **Precision Reference:** ±1% output voltage accuracy.  
- **Adjustable Frequency:** Allows optimization for efficiency and component size.  
- **Phase-Lockable:** Synchronizable to an external clock.  
- **Programmable Soft-Start:** Reduces inrush current during startup.  
- **Differential Current Sensing:** Improves accuracy in current-limited applications.  
- **Power Good Indicators:** Monitors output voltage status.  
- **Low Shutdown Current:** <1µA for power-saving modes.  

This information is based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

Low IQ, Dual, 2-Phase Synchronous Step-Down Controller

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