LTC3850IUFD#PBF

DC DC Switching Controllers Overview

The LTC3850IUFD#PBF is a dual-channel, two-phase synchronous step-down switching controller manufactured by Analog Devices Inc. It operates within an input voltage range of 4V to 24V and supports output voltages from 800mV to 6V. The device delivers up to 25A per channel with a fixed switching frequency of 500kHz. It features a QFN-28 package and maintains a quiescent current of 30µA. The operating temperature range spans from -40°C to +85°C.

DC DC Switching Controllers Feature Summary

• Dual-channel architecture with 180-degree phase shifting to minimize input capacitance and power supply noise
• Constant-frequency current mode control with OPTI-LOOP compensation for optimized transient response
• Integrated soft-start and tracking capabilities via independent TK/SS pins

DC DC Switching Controllers Applications

• Laptop and notebook computer power systems
• Portable instrument power supplies
• Battery-powered digital devices
• DC power distribution networks

DC DC Switching Controllers Procurement Notes

Verify the specific suffix IUFD corresponds to the required QFN-28 package variant during procurement. Confirm that the #PBF designation ensures compliance with RoHS standards. Cross-reference the manufacturer's latest documentation to ensure the component remains active and available for production use.

DC DC Switching Controllers Selection Notes

Select this controller when high efficiency and low noise are critical for dual-rail applications. The fixed 500kHz frequency allows for compact passive component selection. Ensure the design accommodates the 4V to 24V input range and requires precise current sensing integration for optimal performance.

DC DC Switching Controllers Part Context

This component belongs to the LTC3850 family of high-performance synchronous buck controllers. It is designed to drive all N-channel power MOSFET stages efficiently. The series emphasizes low power loss and reduced supply noise through its dual-phase operation and advanced compensation techniques.

DC DC Switching Controllers Replacement Considerations

The LTC3850IGN#PBF serves as a pin-compatible alternative in a narrow SSOP package. Verify thermal dissipation requirements and PCB layout constraints when substituting between QFN and SSOP form factors.

DC DC Switching Controllers FAQ

How does the LTC3850 reduce input capacitor requirements?

It utilizes a dual-channel architecture where the two controller output stages operate out of phase, effectively canceling ripple currents and reducing the necessary input capacitance.

What protection features are included for short circuits?

The device incorporates current foldback to limit MOSFET thermal dissipation during short-circuit conditions, alongside output overvoltage protection.