LTC3850GN Dual Output Synchronous Step-Down DC/DC Controller

The LTC3850GN is a high-performance, dual synchronous step-down DC/DC controller designed by Linear Technology to drive all N-channel power MOSFET stages. Its precision operation and flexible design make it an ideal choice for a variety of applications, including power distribution systems, industrial supplies, and telecommunications equipment.

Key Features:

• Wide Input Voltage Range: The LTC3850GN operates from a 4.5V to 24V input voltage range, making it suitable for a variety of supply sources, from standard 5V rails to intermediate bus voltages.
• Dual Output Channels: It provides two outputs that can be set from 0.8V to 5.5V, allowing for a wide range of output voltages to accommodate different digital ICs and applications.
• High Efficiency: With its synchronous operation, the LTC3850GN reduces power losses by driving external N-channel MOSFETs, enhancing system efficiency especially in light load conditions.
• Fast Transient Response: The controller's high bandwidth error amplifier and phase-locked loop (PLL) design contribute to a fast transient response, maintaining stable output voltages during rapid load changes.
• Adjustable Switching Frequency: The switching frequency is programmable from 250kHz to 750kHz or can be synchronized to an external clock for noise-sensitive applications.
• Current Mode Operation: Provides excellent line and load transient response and cycle-by-cycle current limiting for protection.
• Integrated Features: The LTC3850GN includes features such as a power good signal, an onboard LDO for IC power and gate drive, and soft-start capability to prevent inrush current during startup.
• Thermal Protection: The device is equipped with over-temperature protection to safeguard against excessive heat conditions.

Package and Reliability:

The LTC3850GN is offered in a compact 28-lead SSOP package, providing a space-saving solution for densely packed circuit boards. Linear Technology ensures high reliability and performance, making the LTC3850GN a trusted choice for demanding power management tasks.

Applications:

With its robust feature set and flexible design, the LTC3850GN is suitable for a wide range of applications, including distributed power systems, networking equipment, portable devices, and industrial hardware, where efficient power conversion and tight voltage regulation are critical.