LTC3728IG#PBF

DC DC Switching Controllers Overview

The LTC3728IG#PBF is a dual high-performance synchronous step-down switching regulator controller manufactured by Analog Devices Inc. It operates within an input voltage range of 4.5V to 28V and supports output voltages of 3.3V and 5V with a maximum output current of 25A per channel. The device features a constant frequency current mode architecture with a switchable frequency up to 550kHz. Packaged in a 28-lead SSOP, it functions reliably across a temperature range of -40°C to +85°C.

DC DC Switching Controllers Feature Summary

• Dual-channel synchronous buck controller driving all N-channel MOSFET stages
• Constant frequency current mode architecture for stable regulation
• External frequency synchronization capability for phase-locking applications

DC DC Switching Controllers Applications

• Point-of-load (POL) power distribution systems
• Industrial equipment power supplies
• Telecommunications infrastructure

DC DC Switching Controllers Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm package type and temperature grade. Confirm availability status as supply conditions may vary. Ensure compatibility with external MOSFET selection for the required current handling. Cross-reference datasheet revisions for any pinout or electrical characteristic updates prior to integration.

DC DC Switching Controllers Selection Notes

Select this component when dual independent low-voltage rails are required from a higher input bus. The 550kHz frequency allows for compact passive component sizing compared to lower frequency alternatives. Verify that the external MOSFETs can handle the thermal dissipation associated with the 25A output capability. Ensure the control loop compensation network is designed for the specific output capacitance and ESR selected.

DC DC Switching Controllers Part Context

This part belongs to the LTC3728L family of dual synchronous step-down controllers. It shares architectural similarities with other members like the LTC3728IUH but differs in package configuration and specific electrical ratings. The IG suffix denotes the SSOP package variant, distinguishing it from QFN or LQFP options within the same functional family.

DC DC Switching Controllers Replacement Considerations

Direct replacements include other variants within the LTC3728 family such as the LTC3728IUH or LTC3728LCGN, provided the package footprint and pinout compatibility are verified. Check for equivalent thermal performance and switching frequency ranges when substituting.