LTC3731H (4)

The LTC3731H is available from Analog Devices at Xecor. Designed for high-output current DC/DC power supplies, the LTC3731H offers 3-phase current mode control, ±5% output current matching, and ±2% VREF accuracy over temperature up to 140°C. Available in 36-pin SSOP and 5mm × 5mm QFN packages, it is ideal for automotive and industrial power supplies. Whether used in high-efficiency power systems or multi-phase power applications, this series ensures optimized thermal performance, reduced power supply noise, and scalability for demanding applications. Xecor is an authorized distributor for Analog Devices. Please view our extensive selection of the LTC3731H series below.

Part Number Description Package Inventory Add To Bom
LTC3731HUH#TRPBF High-performance power management IC for demanding applicatio QFN-32 9,852
LTC3731HUH#PBF Pin-Friendly Package: The QFN package features a small footprint of just 32 pins QFN-32 7,292
LTC3731HG#PBF Efficient step-down controller for electronic devices SSOP-24 5,936
LTC3731HG#TRPBF Synchronous Buck Switching Regulator Control for 3-Phase, 600kHz Voltage Regulation SSOP-36 4,150

Key Featrues

3-Phase Current Mode Controller with Onboard MOSFET Drivers: This feature enhances performance by driving N-channel MOSFETs with 120° phase separation, reducing RMS current losses in input and output capacitors. It improves efficiency and thermal management, making it ideal for high-current applications like automotive and industrial power supplies.
±5% Output Current Matching: Ensures precise current distribution across phases, optimizing thermal performance and reducing the size of inductors and MOSFETs. This leads to more compact designs and improved reliability in high-power systems.
±2% VREF Accuracy Over Temperature: Maintains tight voltage regulation up to 140°C, ensuring stable operation in harsh environments. This is critical for automotive and industrial applications where temperature variations are significant.
PWM, Stage Shedding™, or Burst Mode Operation: Offers flexibility in operation modes to maximize efficiency across varying load conditions. Stage Shedding™ and Burst Mode optimize light load efficiency, while PWM ensures robust performance at higher loads.
Adjustable Soft-Start Current Ramping: Prevents inrush current surges during startup, protecting components and ensuring smooth power delivery. This feature is particularly beneficial in systems with sensitive loads or where controlled startup is essential.

Applications

High-Current Automotive Power Supplies: The LTC3731H is ideal for designing high-current DC/DC power supplies in automotive applications. Its 3-phase architecture and ±5% output current matching ensure efficient thermal performance and reliability, making it suitable for powering advanced automotive systems such as infotainment, ADAS, and electric vehicle components.
Industrial Power Management Systems: The LTC3731H is well-suited for industrial power supplies requiring high output currents and robust performance. Its ±2% VREF accuracy and adjustable soft-start current ramping ensure stable operation in harsh environments, making it ideal for factory automation, robotics, and heavy machinery.
Multi-Phase Server Power Supplies: The LTC3731H is perfect for high-performance server and data center power supplies. Its ability to operate up to 12 phases with selectable phase output ensures scalability and efficiency, while its OPTI-LOOP™ compensation minimizes output capacitance, reducing system cost and size.
Portable High-Power Devices: The LTC3731H is an excellent choice for portable devices requiring high power output, such as medical equipment or portable test instruments. Its Burst Mode® operation and Stage Shedding™ technology optimize light load efficiency, extending battery life while maintaining high performance in compact designs.