LTC1871HMS#PBF

DC DC Switching Controllers Overview

The LTC1871HMS#PBF is a wide input range, No RSENSE current mode boost, flyback, and SEPIC controller manufactured by Analog Devices Inc. It operates within an input voltage range of 2.5V to 36V and supports switching frequencies from 50kHz to 1MHz. The device features a maximum duty cycle of 97% and utilizes a 10-pin MSOP package. It includes an internal 5.2V LDO and offers micro-power shutdown with IQ of 10µA. The controller supports Burst Mode operation for high efficiency at light loads and allows synchronization to an external clock.

DC DC Switching Controllers Feature Summary

• No RSENSE current sensing technology eliminates the need for discrete sense resistors by utilizing power MOSFET on-resistance, maximizing system efficiency.
• Burst Mode operation enables ultra-low quiescent current during light load conditions, optimizing performance for battery-powered applications.
• Wide operating input voltage range accommodates single-cell lithium-ion batteries and higher voltage telecom sources without component changes.
• Integrated internal 5.2V low-dropout regulator simplifies biasing requirements for the control circuitry.

DC DC Switching Controllers Applications

• Telecommunications power supplies
• Portable electronic devices powered by single-cell or lithium-ion batteries
• High-voltage, high-power telecom equipment

DC DC Switching Controllers Procurement Notes

Verify the specific suffix H against official Analog Devices documentation to confirm temperature grade and availability status. Mouser listings indicate limited supply or discontinuation risks for this specific part number. Confirm RoHS compliance and lead times directly with the manufacturer or authorized distributors before finalizing procurement plans.

DC DC Switching Controllers Selection Notes

Select this controller for designs requiring high efficiency in small form factors where minimizing external components is critical. The No RSENSE feature reduces cost and board space but requires careful selection of the external power MOSFET based on its RDS(ON). Ensure the application falls within the specified 2.5V to 36V input range and consider the 10-pin MSOP package constraints for thermal management.

DC DC Switching Controllers Part Context

This component belongs to the LTC1871X series of DC/DC controllers designed for versatile topologies including boost, flyback, and SEPIC. It is engineered for mid-to-low power applications where size and efficiency are paramount. The family integrates advanced current mode control techniques to provide superior transient response while maintaining stability across varying load conditions.

DC DC Switching Controllers Replacement Considerations

LTC1871IMS#PBF: Verified alternative within the same product family offering identical functionality with potentially different industrial temperature grading or packaging variations. Verify pin compatibility and electrical specifications against the datasheet before substitution.