LT8616HFE

Overview

The LT8616HFE is a high-efficiency, dual synchronous monolithic step-down switching regulator manufactured by Analog Devices Inc. It supports an input voltage range of 5.8V to 42V and delivers up to 6.5A of output current per channel. The device features a low quiescent current of 6.5µA with both channels enabled. It operates at a fixed switching frequency of 2.05MHz, enabling the use of small external components. The regulator includes integrated soft-start, current limit protection, and thermal shutdown for robust performance in compact power designs.

Feature Summary

• Dual synchronous buck topology providing independent regulated outputs
• Ultra-low quiescent current consumption for efficient standby operation
• Integrated Silent Switcher architecture to minimize electromagnetic interference
• Built-in protection mechanisms including soft-start and thermal overload

Applications

• Industrial distributed power systems
• Automotive infotainment and control modules
• Telecommunications base station equipment
• Battery-powered instrumentation requiring extended runtime

Procurement Notes

Verify the specific suffix HFE against the official datasheet to confirm package type and temperature rating. Ensure compatibility with your PCB footprint and thermal management strategy. Confirm availability status through authorized distributors as supply levels may fluctuate. Validate that the component meets all required environmental certifications for your target market.

Selection Notes

Select this component when dual isolated or non-isolated buck rails are needed from a single high-voltage source. The 2.05MHz frequency allows for smaller inductors compared to lower-frequency alternatives. Consider the 6.5A current capability for moderate-to-high load applications. Evaluate thermal dissipation requirements based on the expected duty cycle and ambient conditions.

Part Context

The LT8616 belongs to Analog Devices' Silent Switcher family, designed for high efficiency and low noise. It complements other regulators in the series like the LT8610 and LT8613, offering higher current density in a dual-channel configuration. This part is suitable for applications demanding compact size and high reliability in harsh environments.

Replacement Considerations

Direct substitutes include the LT8616EFE and LT8616IFE, which share identical electrical specifications but differ in package style and operating temperature range. Verify pinout compatibility before substitution. Alternative dual-channel regulators from other manufacturers may require significant circuit redesign due to differing control architectures.