LT3508HUF#TRPBF

Overview

The LT3508HUF#TRPBF is a dual synchronous step-down switching regulator manufactured by Analog Devices Inc. It integrates two independent high-efficiency buck converters within a single package, designed to provide dual output voltages from a wide input voltage range of 2.7V to 36V. The device features an internal 1.4A power switch for each channel, supporting adjustable output voltages down to 0.8V. Operating with a fixed switching frequency of approximately 920kHz, it utilizes a 16-lead HFNQ (HeatFrame) surface-mount package to facilitate thermal management and compact board layout.

Feature Summary

• Integrates two independent synchronous buck regulators in a single compact package
• Supports wide input voltage range suitable for various power supply architectures
• Features internal high-current switches for efficient power conversion
• Includes thermal pad design for effective heat dissipation

Applications

• Portable electronics requiring dual voltage rails
• Industrial control systems with mixed logic and analog power needs
• Automotive infotainment and instrumentation modules
• Communication equipment powering multiple subsystems

Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing components. Confirm that the HUF package designation corresponds to the correct thermal and pinout requirements for your PCB footprint. Ensure compatibility with the intended operating temperature range and validate that the 1.4A per-channel current rating meets the load demands of both outputs under maximum duty cycle conditions.

Selection Notes

Select this component when a dual-output solution is required to save board space compared to using two separate regulators. It is appropriate for designs needing independent adjustment of two output voltages from a common input source. Consider the thermal performance of the HeatFrame package if high ambient temperatures or continuous full-load operation is expected. Verify that the 920kHz switching frequency aligns with EMI constraints and inductor size preferences.

Part Context

This part belongs to the LT3508 family of dual synchronous step-down regulators. It shares functional similarities with other multi-channel PMICs but distinguishes itself through its specific dual-buck topology and integrated switch ratings. The HUF package variant offers a balance between thermal performance and small form factor, making it distinct from larger leaded packages or different pin-count alternatives in the broader power management portfolio.

Replacement Considerations

Direct substitutes may include other dual buck regulators from Analog Devices such as the LT3506 series, though pinouts and current ratings must be verified. Cross-reference with competitors offering similar dual-channel synchronous buck controllers, ensuring input voltage ranges and thermal characteristics match the original design requirements.