LTC1871EMS#PBF

DC DC Switching Controllers Overview

The LTC1871EMS#PBF is a wide input range, current mode switching controller designed for boost, flyback, and SEPIC topologies. It operates with an input voltage range of 2.5V to 36V and supports adjustable switching frequencies from 50kHz to 1MHz via an external resistor. The device features No RSENSE™ technology, utilizing the power MOSFET's on-resistance for peak current control to maximize efficiency in medium-to-low power applications. It includes a 10µA shutdown current, Burst Mode operation for light loads, and an internal 5.2V LDO.

DC DC Switching Controllers Feature Summary

• No RSENSE technology eliminates external current sense resistors by leveraging power MOSFET on-resistance
• Wide input voltage capability ranging from 2.5V to 36V
• Adjustable switching frequency from 50kHz to 1MHz with external synchronization support
• Burst Mode operation minimizes quiescent current during light load conditions

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 and package variant against the official Analog Devices datasheet to ensure compatibility with design requirements. Confirm RoHS compliance status and material declarations prior to integration. Cross-reference the manufacturer part number with authorized distributor listings to validate authenticity and supply chain integrity.

DC DC Switching Controllers Selection Notes

Select this component for designs requiring flexible topology support including boost, flyback, and SEPIC configurations. The No RSENSE feature simplifies board layout and improves efficiency in low-power scenarios. Ensure the external MOSFET selection aligns with the controller's current sensing capabilities and that the operating temperature range meets system environmental specifications.

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 distinct from fixed-output regulators or synchronous buck converters, focusing instead on versatile non-isolated DC-DC conversion architectures. The MSOP-10 package provides a compact solution for space-constrained portable applications.

DC DC Switching Controllers Replacement Considerations

LTC1871HMS#PBF

DC DC Switching Controllers FAQ

How does the LTC1871 achieve current sensing without a resistor?

It utilizes No RSENSE technology, which monitors the voltage drop across the power MOSFET's channel resistance (RDS(on)) to regulate peak current.

Can the switching frequency be synchronized to an external clock?

Yes, the MODE/SYNC pin allows the device to synchronize with an external clock up to 1.3 times the internal oscillator frequency.