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LTC1628IUH from LINEAR

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LTC1628IUH

Manufacturer: LINEAR

High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator

Partnumber Manufacturer Quantity Availability
LTC1628IUH LINEAR 49 In Stock

Description and Introduction

High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator The LTC1628IUH is a synchronous step-down switching regulator controller manufactured by Linear Technology (now part of Analog Devices). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Input Voltage Range:** 4V to 36V  
- **Output Voltage Range:** 0.8V to 5V (adjustable)  
- **Switching Frequency:** Up to 550kHz (adjustable)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** 32-Lead QFN (5mm × 5mm)  
- **Topology:** Synchronous Buck (Step-Down) Controller  
- **Efficiency:** Up to 95%  
- **Current Limit:** Adjustable  
- **Duty Cycle:** Up to 100%  

### **Descriptions:**
The LTC1628IUH is a high-performance, current-mode synchronous buck controller designed for high-efficiency DC/DC conversion. It drives external N-channel MOSFETs and includes features for precision voltage regulation, current sensing, and protection. It is suitable for applications requiring high power density and efficiency, such as telecom, industrial, and automotive systems.

### **Features:**
- **Synchronous Operation:** Reduces power loss by replacing the Schottky diode with a MOSFET.  
- **Adjustable Frequency:** Allows optimization for efficiency or component size.  
- **Current Mode Control:** Provides fast transient response and cycle-by-cycle current limiting.  
- **Low Dropout Operation:** Allows 100% duty cycle for maximum input-to-output voltage conversion.  
- **Programmable Soft-Start:** Prevents inrush current at startup.  
- **Short-Circuit Protection:** Includes foldback current limiting.  
- **Low Quiescent Current:** Typically 1.2mA in shutdown mode.  
- **Wide Input Voltage Range:** Supports 4V to 36V operation.  

This regulator is ideal for high-power applications requiring high efficiency and compact design.

Application Scenarios & Design Considerations

High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator
Partnumber Manufacturer Quantity Availability
LTC1628IUH LT 1475 In Stock

Description and Introduction

High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator The LTC1628IUH is a high-efficiency, dual synchronous step-down switching regulator controller manufactured by Linear Technology (now part of Analog Devices).  

### **Specifications:**  
- **Input Voltage Range:** 4V to 36V  
- **Output Voltage Range:** 0.8V to 5.5V (adjustable)  
- **Switching Frequency:** 50kHz to 300kHz (programmable)  
- **Maximum Duty Cycle:** 100%  
- **Operating Temperature Range:** -40°C to 125°C  
- **Package:** 32-Lead QFN (5mm × 5mm)  
- **Efficiency:** Up to 95%  
- **Current Mode Control:** Yes  
- **Synchronous Rectification:** Yes  
- **Output Current:** Up to 20A per phase (with external MOSFETs)  

### **Descriptions:**  
The LTC1628IUH is designed for high-performance power supply applications, providing two independent step-down regulators. It features current-mode control for fast transient response and excellent line/load regulation. The device supports low dropout operation and can be synchronized to an external clock.  

### **Features:**  
- Dual synchronous buck controller  
- Adjustable switching frequency (50kHz–300kHz)  
- Programmable soft-start  
- Current mode control for improved transient response  
- Low shutdown current (<1µA)  
- Overcurrent and overtemperature protection  
- Phase-lockable oscillator for noise-sensitive applications  
- Operates with ceramic capacitors for reduced output ripple  

This information is based on the manufacturer's datasheet. For detailed application notes and design considerations, refer to the official documentation.

Application Scenarios & Design Considerations

High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator

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