LTC3859AEFE

DC DC Switching Controllers Overview

The LTC3859AEFE is a high-performance, triple-output synchronous DC/DC switching regulator controller designed to drive all N-channel power MOSFET stages. It supports dual buck and one boost topology with an input voltage range of 2.5V to 38V. The device provides three independent outputs, typically configured for voltages such as 3.3V, 8.5V, or 10V, with output currents up to 5A at 3.3V and 3A at 8.5V in standard reference designs. Operating temperatures range from -40°C to +125°C.

DC DC Switching Controllers Feature Summary

• Supports dual buck and single boost synchronous topologies
• Drives all N-channel power MOSFET stages
• Features improved burst mode operation for low quiescent current
• Provides wide input voltage capability for flexible system design

DC DC Switching Controllers Applications

• Dual output 3.3V/8.5V synchronous buck/boost converters
• Triple output buck/buck/boost synchronous controllers
• Low IQ power supply systems requiring wide input ranges
• Industrial control boards with mixed voltage rails

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'EFE' corresponds to the QFN-38 package and commercial temperature grade when sourcing. Confirm that the component is the 'A' grade variant if enhanced specifications are required. Ensure the ordering part number matches the exact tape-and-reel quantity specified by the manufacturer to avoid packaging discrepancies during assembly.

DC DC Switching Controllers Selection Notes

Select this controller when designing systems requiring two buck outputs and one boost output from a single wide-range input. It is suitable for applications needing low quiescent current via burst mode. Ensure external MOSFETs can handle the required current levels, as the IC is a controller only. Verify thermal management requirements for the QFN-38 package under maximum load conditions.

DC DC Switching Controllers Part Context

The LTC3859A series belongs to Analog Devices' portfolio of high-efficiency synchronous DC/DC controllers. It is engineered for applications demanding multiple regulated rails from varying input sources. The 'A' designation indicates specific performance grades within the family, while the 'EFE' suffix defines the physical package and temperature rating.

DC DC Switching Controllers Replacement Considerations

LTC3859EFE serves as the base model without the 'A' grade enhancement. Other members of the LTC3859 family may offer different pinouts or feature sets; verify datasheet compatibility before substitution.