LTC1871XMS#PBF

DC DC Switching Controllers Overview

The LTC1871XMS#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 50 kHz to 1 MHz. The device features a maximum duty cycle of 97% and includes an internal 5.2V LDO regulator. Designed for high-temperature environments, it functions between -40°C and +125°C with ±2% reference accuracy across the full range. Packaged in a compact MSOP-10 format, it offers low quiescent current operation suitable for battery-powered systems.

DC DC Switching Controllers Feature Summary

• Eliminates current sense resistors by utilizing power MOSFET on-resistance for current mode control, maximizing efficiency in medium-to-low power applications.
• Optimized for extreme thermal conditions with 100% testing at 175°C and robust Cu/Ni/Au lead frame plating for long-term reliability.
• Supports flexible Burst Mode operation for extended battery life while allowing synchronous external clocking up to 1.3 times the oscillator frequency.

DC DC Switching Controllers Applications

• High-temperature power supplies for oil exploration drilling equipment
• Battery-powered systems requiring extended operational life
• Portable electronic devices utilizing boost, flyback, or SEPIC topologies

DC DC Switching Controllers Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm the specific X suffix indicates the extended temperature grade (-40°C to +175°C) compared to standard industrial variants. Request original manufacturer documentation to validate RoHS compliance and lot traceability before finalizing acquisition.

DC DC Switching Controllers Selection Notes

Select this controller when designing for harsh thermal environments exceeding standard industrial limits. The No RSENSE architecture reduces bill-of-materials cost and board space but requires careful consideration of MOSFET RDS(on) variations. Ensure the application topology matches the supported boost, flyback, or SEPIC configurations for optimal transient response.

DC DC Switching Controllers Part Context

This component belongs to the LTC1871X family, which extends the standard LTC1871 series capabilities to higher operating temperatures. While similar to the LTC1871EMS or LTC1871IMS, the X-grade variant provides guaranteed performance up to 175°C, making it distinct for specialized industrial and automotive under-hood applications where standard parts would fail.

DC DC Switching Controllers Replacement Considerations

Direct pin-compatible substitutes include other LTC1871 variants such as LTC1871IMS#PBF for lower temperature ranges. For non-pin-compatible alternatives, evaluate controllers supporting No RSENSE technology with comparable input voltage windows and MSOP-10 packaging constraints.