LTC3859AIFE

DC DC Switching Controllers Overview

The LTC3859AIFE is a high-performance triple output synchronous DC/DC switching regulator controller designed to drive all N-channel power MOSFET stages. It supports Buck, Buck, and Boost topologies with an input voltage range of 2.5V to 38V. The device offers three independent outputs with adjustable voltages from 800mV to 24V. Operating frequencies are programmable from 75kHz to 850kHz. It features low quiescent current of 55µA and load regulation of 0.01%. The controller operates within a temperature range of -40°C to +125°C and is housed in a QFN-38 package.

DC DC Switching Controllers Feature Summary

• Supports triple output configurations including dual buck and boost topologies for flexible power distribution.
• Drives all N-channel power MOSFET stages for high efficiency synchronous rectification.
• Features improved Burst Mode operation for enhanced light-load efficiency.
• Provides wide input voltage compatibility suitable for various bus architectures.

DC DC Switching Controllers Applications

• High efficiency dual 3.3V/8.5V synchronous buck/boost converter designs
• Triple output 24V/1V/1.2V synchronous converters from 12V input
• Dual 12V/3.3V synchronous buck/boost converter systems
• Dual 5V/8.5V buck/boost synchronous converter circuits

DC DC Switching Controllers Procurement Notes

Verify the specific suffix (IFE) against the manufacturer's official datasheet to confirm pinout and thermal pad configuration. Ensure the ordering part number matches the exact package variant required for your PCB layout. Cross-reference the RoHS compliance status directly with Analog Devices documentation prior to final procurement decisions.

DC DC Switching Controllers Selection Notes

Select this component when a single controller must manage multiple output rails with mixed buck and boost requirements. It is suitable for designs requiring wide input voltage ranges up to 38V. Consider the QFN-38 package constraints for thermal management. Verify that the external MOSFET selection aligns with the controller's drive capabilities and frequency settings.

DC DC Switching Controllers Part Context

The LTC3859A belongs to the LTC3859 family of synchronous DC/DC controllers. This series is characterized by low IQ and support for driving N-channel MOSFETs. The A-grade variant typically offers extended temperature performance or specific electrical enhancements compared to standard grades, fitting into Analog Devices' portfolio of high-efficiency power management solutions.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Consult Analog Devices official documentation for direct replacements or cross-references.