LTC3850IGN#TRPBF

DC DC Switching Controllers Overview

The LTC3850IGN#TRPBF is a dual synchronous step-down switching controller from Analog Devices, packaged in a 28-lead narrow SSOP. It drives two N-channel power MOSFET stages with a phase-lockable frequency range of 250kHz to 780kHz. The device operates on an input voltage of 4V to 24V (30V for the I grade) and provides a precise 0.8V reference with ±1% accuracy. Key electrical parameters include a maximum output current capability of 25A per channel, a typical quiescent supply current of 850µA, and a shutdown current of 30µA. It supports continuous, pulse-skipping, or Burst Mode operation.

DC DC Switching Controllers Feature Summary

• Dual controllers operate 180 degrees out of phase to minimize input capacitance requirements and reduce power supply induced noise.
• OPTI-LOOP compensation architecture optimizes transient response across a wide range of output capacitance and ESR values.
• Independent temperature compensation and soft-start pins allow for adjustable output voltage ramping during startup.
• Current foldback limits MOSFET heat dissipation during short-circuit conditions while supporting pre-biased outputs.

DC DC Switching Controllers Applications

• Laptop and notebook computer power distribution
• Portable instrument and battery-powered digital equipment
• DC-to-DC power supply systems

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing components. Confirm that the base part number corresponds to the standard operating range rather than the extended voltage variant. Ensure compatibility with the required thermal management for the SSOP package. Cross-reference the manufacturer's latest documentation for any pinout or specification updates prior to finalizing procurement orders.

DC DC Switching Controllers Selection Notes

Select this component when designing high-efficiency dual-rail systems requiring independent control. The wide input voltage range accommodates various battery chemistries and intermediate bus voltages. Consider the phase-lockable frequency feature if synchronization with other system clocks is necessary. Evaluate the need for external current sensing resistors versus DCR sensing based on board space constraints.

DC DC Switching Controllers Part Context

This controller belongs to the LTC3850 family of dual synchronous step-down regulators. It shares architectural similarities with single-channel variants like the LTC3851 but offers integrated dual-phase control. The device is designed for applications demanding high efficiency and compact footprint solutions within portable electronics and industrial power systems.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult official Analog Devices resources for direct replacements or functional equivalents.