LT3988EMSE#PBF

Overview

The LT3988EMSE#PBF is a dual-channel synchronous step-down DC/DC converter manufactured by Analog Devices Inc. It operates with an input voltage range of 4.1V to 60V and provides two adjustable output channels, each capable of delivering up to 1A of current. The minimum regulated output voltage is 0.75V, with a maximum of 59.4V per channel. The device features an adjustable switching frequency ranging from 250kHz to 2.15MHz. It is housed in a 16-lead MSOP package with an exposed pad and supports junction temperatures from -40°C to +125°C.

Feature Summary

• Dual independent synchronous buck channels for flexible power distribution
• Wide 60V input voltage capability suitable for industrial bus architectures
• Adjustable switching frequency allows optimization for efficiency or component size
• Integrated soft-start functionality to limit inrush current during startup

Applications

• Industrial automation controllers requiring isolated or multi-rail power supplies
• Telecommunications infrastructure equipment operating on 48V or higher buses
• Distributed power systems in automotive and transportation applications
• Point-of-load regulation for high-voltage input digital circuits

Procurement Notes

Verify the specific suffix #PBF indicates tube packaging when ordering. Confirm that the 16-MSOP-EP package dimensions match your PCB footprint requirements. Ensure the design accounts for thermal dissipation given the exposed pad requirement. Check current availability status as supply constraints may affect lead times for this specific part number.

Selection Notes

Select this component when dual isolated outputs are required from a single high-voltage source. The adjustable frequency feature allows designers to minimize external passive component sizes. Verify that the total load current does not exceed the combined 2A limit across both channels. Consider thermal management solutions if operating near maximum temperature ratings.

Part Context

This part belongs to the LT3988 family of dual synchronous buck converters. It shares architectural similarities with other high-voltage regulators but is distinct in its dual-channel configuration. The EMSE suffix denotes the specific MSOP package variant. It complements single-channel counterparts like the LT3990 by providing integrated dual-output capabilities.

Replacement Considerations

Direct pin-to-pin replacements within the same family include other LT3988 variants with different suffixes indicating package or temperature grade differences. Cross-family replacements require careful evaluation of pin compatibility and thermal performance. Verify that alternative parts support the required 60V input rating and 1A per channel output specification.