LTC3857IGN-1#PBF

DC DC Switching Controllers Overview

The LTC3857IGN-1#PBF is a low quiescent current, dual-channel synchronous step-down switching regulator controller manufactured by Analog Devices Inc. It operates within an input voltage range of 4V to 38V and supports output voltages from 800mV to 24V. The device features a fixed switching frequency of 680kHz and draws only 50µA of static current. It is housed in a 28-lead SSOP package and functions as a DC-to-DC converter with two independent outputs capable of driving N-channel MOSFETs.

DC DC Switching Controllers Feature Summary

• Dual-channel architecture for independent synchronous buck control
• Low quiescent current operation for enhanced efficiency
• Supports wide input voltage ranges up to 38V
• Integrated soft-start and tracking capabilities

DC DC Switching Controllers Applications

• High-efficiency dual-rail power systems
• Industrial distributed power architectures
• Embedded computing board power management
• Telecommunications infrastructure supplies

DC DC Switching Controllers Procurement Notes

Verify the specific suffix and package variant against the official datasheet before ordering. Confirm that the 28-SSOP form factor matches the target PCB footprint. Ensure the component meets RoHS3 compliance requirements for the intended manufacturing process. Cross-reference the manufacturer part number with authorized distributor catalogs to avoid counterfeit sources.

DC DC Switching Controllers Selection Notes

Select this controller when dual isolated or non-isolated rails are required from a single high-voltage source. The fixed 680kHz frequency optimizes passive component size while maintaining stability. Consider the 50µA IQ for applications requiring minimal standby power consumption. Validate thermal performance within the -40°C to +125°C operating range for harsh environments.

DC DC Switching Controllers Part Context

This component belongs to the PolyPhase series of power management integrated circuits designed for high-density applications. It complements other dual-phase controllers like the LTC3858 and LTC3856 by offering a balance between current capability and quiescent loss. The device serves as a core element in modern multi-rail power distribution networks.

DC DC Switching Controllers Replacement Considerations

Direct substitutes include the LTC3857EGN-1#PBF which shares identical electrical specifications but utilizes a different package configuration. Verify pinout compatibility and thermal dissipation characteristics when transitioning between package types.