LTC1871HMS#TRPBF

DC DC Switching Controllers Overview

The LTC1871HMS#TRPBF is a wide input range, current mode boost, flyback, and SEPIC controller designed to drive N-channel power MOSFETs with minimal external components. It eliminates the need for current sense resistors by utilizing the MOSFET's on-resistance, thereby maximizing efficiency in medium-to-low power applications. The device supports an operating frequency range of 50 kHz to 1 MHz, adjustable via an external resistor, and features Burst Mode operation for light load efficiency. It includes an internal 5.2V LDO, operates from a supply voltage of 2.5V to 36V, and offers a low shutdown quiescent current of 10µA.

DC DC Switching Controllers Feature Summary

• Eliminates current sense resistors by sensing current through the power MOSFET's on-resistance to maximize system efficiency
• Supports flexible switching frequencies from 50 kHz to 1 MHz with synchronization capability to an external clock
• Features Burst Mode operation for improved light-load efficiency and ultra-low shutdown quiescent current
• Integrates an internal 5.2V Low Dropout Regulator (LDO) to simplify biasing requirements

DC DC Switching Controllers Applications

• Telecommunications power supplies
• Portable electronic devices
• Battery-operated systems requiring high efficiency

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing. Confirm the 'H' grade designation meets required temperature specifications for your application environment. Ensure compatibility with the 10-pin MSOP package footprint during PCB layout. Cross-reference official Analog Devices documentation for any recent lifecycle or obsolescence notices.

DC DC Switching Controllers Selection Notes

Select this component for designs prioritizing efficiency in boost, flyback, or SEPIC topologies where eliminating sense resistors reduces cost and losses. Consider the 50 kHz to 1 MHz frequency range for balancing component size against transient response. Evaluate the 2.5V minimum operating voltage against your system's lowest battery or rail condition. Verify that the 10µA shutdown current aligns with standby power constraints.

DC DC Switching Controllers Part Context

This part belongs to the LTC1871 family of wide input range controllers manufactured by Analog Devices Inc. It is specifically engineered for non-isolated and isolated DC-DC converter architectures. The device integrates essential control logic while minimizing external component count, distinguishing it from standard PWM controllers that require discrete current sensing elements.

DC DC Switching Controllers Replacement Considerations

Consult official Analog Devices documentation for verified substitute part numbers within the same product family or equivalent functional replacements.