LTC3728LEGN-1#PBF

DC DC Switching Controllers Overview

The LTC3728LEGN-1#PBF is a dual synchronous buck switching regulator controller manufactured by Analog Devices Inc. It operates within an input voltage range of 4.5 V to 28 V and supports output voltages of 3.3 V and 5 V. The device delivers up to 25 A of output current across two channels. Key electrical parameters include a fixed switching frequency of 550 kHz, a maximum duty cycle of 99.4%, and a quiescent current of 20 µA. It functions in a temperature range from -40°C to +85°C and is housed in a 28-lead SSOP package.

DC DC Switching Controllers Feature Summary

• Dual-channel architecture driving all N-channel synchronous power MOSFET stages for high efficiency.
• Constant frequency current mode control architecture allowing phase-lockable operation up to 550 kHz.
• Integrated protection features including soft start, enable, and power good signals.

DC DC Switching Controllers Applications

• High-efficiency dual-output step-down converters
• Industrial power supply systems requiring synchronized frequencies
• Telecommunications equipment power management

DC DC Switching Controllers Procurement Notes

Verify the specific suffix and package type against the manufacturer's official datasheet to ensure compatibility with design requirements. Confirm that the component meets all necessary environmental and safety certifications required for the target application before finalizing procurement decisions.

DC DC Switching Controllers Selection Notes

Select this controller when designing dual-output DC-DC converters requiring high current capability and precise synchronization. Ensure external components support the 4.5 V to 28 V input range and 550 kHz switching frequency. Verify thermal management strategies for the SSOP-28 package under maximum load conditions.

DC DC Switching Controllers Part Context

This component belongs to the LTC3728L family of dual synchronous buck controllers. It is designed for applications requiring multiple regulated outputs from a single input source. The part integrates advanced control loops to maintain stability across varying load and line conditions.

DC DC Switching Controllers Replacement Considerations

Consult official documentation for direct substitutes within the LTC3728 series. Verify pinout compatibility and electrical specifications before considering alternative manufacturers or updated revisions.