LTC3858EUFD-1 Low Voltage Synchronous Step-Down DC/DC Controller

The LTC3858EUFD-1 is a high performance, dual output synchronous step-down DC/DC controller that drives all N-channel power MOSFET stages. Manufactured by Linear Technology, this controller is designed to power the latest generation of microprocessors in computing and industrial applications, requiring a compact, efficient, and high-performance power supply solution.

Key Features:

• Wide Input Voltage Range: The LTC3858EUFD-1 can operate from an input voltage range of 4.5V to 38V, making it suitable for a wide variety of applications and ensuring compatibility with many different types of power sources.
• Dual Output: It provides two outputs which can be set to a voltage range of 0.8V to 24V, offering flexibility for dual supply systems or multiple voltage rails.
• High Efficiency: The device features a high efficiency operation, which reduces heat generation and improves system reliability. This is achieved through its low quiescent current and the use of synchronous rectification.
• Adjustable Switching Frequency: Users can adjust the switching frequency from 250kHz to 750kHz or synchronize it to an external clock, allowing optimization of efficiency and component size.
• Current Mode Control: The LTC3858EUFD-1 uses current mode control for excellent line and load transient response, which is crucial for maintaining stable output voltages during rapid load changes.
• Integrated Features: It includes a differential output voltage sensing for precise regulation, a phase-lockable frequency (75kHz to 850kHz), and a powerful 1.1Ω onboard gate drivers.

Applications:

• Point of Load Applications: Ideal for converting a high voltage main power supply into one or more lower voltage outputs required by the load.
• Computing Systems: Suitable for powering CPUs, GPUs, memory, and other critical components in computing hardware.
• Telecommunications: Can be used for power supplies in networking and telecom equipment.
• Industrial Equipment: Provides reliable and efficient power conversion for various industrial applications.

The LTC3858EUFD-1 comes in a 28-lead 4mm x 5mm QFN package, providing a compact solution that fits in space-constrained applications. The combination of its features and packaging makes the LTC3858EUFD-1 a versatile and high-performance choice for modern electronic power supply designs.