LTC1538IG-AUX#PBF

DC DC Switching Controllers Overview

The LTC1538IG-AUX#PBF is a dual synchronous step-down switching regulator controller manufactured by Analog Devices Inc. It operates in a phase-lockable fixed frequency architecture to drive external N-channel power MOSFETs. The device supports an input voltage range of 5.2V to 28V and provides regulated outputs including 5V at 3A and 3.3V at 3A. A third low-noise output can be configured as a 12V linear regulator powered from the primary output, delivering up to 200mA. The controller achieves high efficiency, with documented performance reaching 98% in specific reference designs.

DC DC Switching Controllers Feature Summary

• Dual synchronous buck switching regulator controller architecture
• Phase-lockable fixed frequency operation for external N-channel MOSFET driving
• Integrated capability for auxiliary low-noise linear regulation

DC DC Switching Controllers Applications

• Constant frequency synchronous triple-output DC/DC conversion systems
• Low noise power supply designs requiring secondary winding power
• High efficiency dual channel step-down converter implementations

DC DC Switching Controllers Procurement Notes

Verify the exact suffix configuration when ordering, as variations such as #PBF indicate lead-free packaging compliance. Confirm that the specific AUX variant matches the required auxiliary output topology. Cross-reference the manufacturer's latest datasheet to ensure compatibility with current design specifications and environmental regulations before finalizing procurement.

DC DC Switching Controllers Selection Notes

Select this component when a dual synchronous buck controller with integrated auxiliary regulation capabilities is required. It is suitable for applications needing precise voltage regulation with low noise characteristics on secondary outputs. Consider the phase-lockable feature if synchronization with other system clocks is necessary for electromagnetic interference management.

DC DC Switching Controllers Part Context

This part belongs to the LTC1538 family of high-efficiency switching regulators. It is designed for compact power solutions requiring multiple regulated rails from a single input source. The controller integrates essential protection features and timing controls to simplify the design of complex multi-output power architectures in industrial and communication equipment.

DC DC Switching Controllers Replacement Considerations

Direct substitutes are not explicitly confirmed in the provided documentation. Evaluate alternative dual buck controllers from Analog Devices based on pinout compatibility and electrical parameter alignment. Ensure any replacement supports the same phase-lockable frequency architecture and auxiliary linear regulator functionality.