The LTC1871EMS-7#PBF is a versatile, high voltage, current mode, boost, flyback or SEPIC controller that drives an N-channel power MOSFET and requires very few external components. Manufactured by Linear Technology, now part of Analog Devices, this controller is designed for a variety of applications, including telecom power supplies, automotive supplies, and battery-operated equipment.

Key Features

• Wide Input Voltage Range: The LTC1871EMS-7#PBF operates from an input voltage range of 2.5V to 36V, making it suitable for applications that require a wide input range.
• Adjustable Operating Frequency: With an operating frequency that can be set from 50kHz to 1MHz with an external resistor or synchronized to an external clock, this controller offers design flexibility.
• High Efficiency: The device features a powerful 1.5A onboard switch, which allows for high efficiency power conversion.
• No RSENSE™: The LTC1871EMS-7#PBF uses a sense resistor for current sensing, eliminating the need for a separate current sense resistor, which can help reduce board space and cost.
• Soft-Start Function: The soft-start feature limits the inrush current during startup, providing a controlled voltage ramp-up and protecting the system from stress.

Applications

• Telecom Power Supplies: The controller's high voltage capability and adjustable frequency make it ideal for the demanding requirements of telecom power supplies.
• Automotive Supplies: Its wide input voltage range and robust design suit the variable conditions of automotive power systems.
• Battery-Operated Equipment: The LTC1871EMS-7#PBF's high efficiency and low quiescent current are perfect for extending battery life in portable devices.

Additional Information

The LTC1871EMS-7#PBF comes in a compact, thermally enhanced 10-lead MSOP package, ensuring efficient heat dissipation and space-saving on the PCB. It also features overvoltage protection and is capable of operating in a shutdown mode, drawing only 10µA of quiescent current, which further enhances its suitability for battery-operated devices.