LTC1871EMS-1#TRPBF

DC DC Switching Controllers Overview

The LTC1871EMS-1#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, maximizing efficiency in medium-to-low power applications. The device operates within an input voltage range of 2.5 V to 36 V and supports switching frequencies from 50 kHz to 1 MHz, set via an external resistor. Key electrical parameters include a maximum duty cycle of 97%, a typical rise time of 17 ns, and a fall time of 8 ns. It features a 5.2 V internal LDO, operates at 250 µA supply current, and functions between -40°C and +85°C in a 10-pin MSOP package.

DC DC Switching Controllers Feature Summary

• Eliminates current sense resistors by leveraging power MOSFET on-resistance for current mode control, thereby maximizing system efficiency.
• Supports Boost, Flyback, and SEPIC topologies with a wide input voltage range suitable for battery-powered systems.
• Features Burst Mode operation for improved light-load efficiency and synchronization capability via the MODE/SYNC pin.

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 '-1' against official Analog Devices documentation to confirm functional differences compared to standard variants like LTC1871EMS#PBF. Ensure the tape-and-reel packaging (#TRPBF) aligns with automated assembly requirements. Cross-reference RoHS compliance status and lead-free specifications prior to ordering. Confirm availability through authorized distributors as stock levels fluctuate.

DC DC Switching Controllers Selection Notes

Select this component for applications requiring flexible topology support (Boost, Flyback, SEPIC) without the cost and loss associated with discrete current sense resistors. The wide input range accommodates various battery chemistries. Consider the 10-pin MSOP package size constraints and thermal performance. Evaluate if the fixed frequency or Burst Mode options best suit the specific load profile and EMI requirements.

DC DC Switching Controllers Part Context

The LTC1871 belongs to Analog Devices' family of switching controllers optimized for non-isolated DC-DC conversion. It integrates essential protection features such as output overvoltage protection and a precise internal voltage reference. The device is part of the PMIC category, specifically targeting power management solutions where space and efficiency are critical constraints in portable and telecom equipment.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.