LTC3838IUHF#PBF

DC DC Switching Controllers Overview

The LTC3838IUHF#PBF is a dual-channel, PolyPhase synchronous step-down DC/DC switching regulator controller manufactured by Analog Devices. It operates with an input voltage range of 4.5 V to 38 V and supports output voltages from 600 mV to 5.5 V. The device delivers up to 30 A per channel and features a programmable switching frequency between 200 kHz and 2 MHz. It utilizes a controlled on-time, valley current mode control architecture for fast transient response without clock delay. The component is housed in a 38-lead QFN package and functions within a temperature range of -40°C to +125°C.

DC DC Switching Controllers Feature Summary

• Dual independent channels drive all N-channel power MOSFETs for flexible multi-phase or single-output configurations.
• Controlled on-time, valley current mode control architecture enables rapid transient response without clock delay.
• Integrated DTR function significantly suppresses output overshoot during load release at low output voltages.
• Supports RSENSE or inductor DCR current sensing methods with remote differential output detection capabilities.

DC DC Switching Controllers Applications

• ASIC power supplies requiring low voltage and high current delivery
• High step-down ratio converters
• Server and workstation motherboard core voltage regulation

DC DC Switching Controllers Procurement Notes

Verify the specific suffix against official documentation, as variations may exist. Confirm RoHS compliance status through the manufacturer's datasheet. Ensure the QFN-38 thermal pad soldering process meets design requirements for reliable operation under high current loads.

DC DC Switching Controllers Selection Notes

Select this controller when designing systems requiring wide input voltage ranges up to 38 V and high efficiency at low output voltages. The dual-channel architecture allows for phase interleaving to reduce input ripple. Consider the thermal performance of the QFN package and ensure adequate PCB layout for high-frequency switching nodes.

DC DC Switching Controllers Part Context

This component belongs to the LTC3838 family of PolyPhase controllers. It is designed for applications demanding precise voltage regulation and fast dynamic response. The device integrates safety features such as overvoltage protection and current limit foldback, making it suitable for robust industrial and computing power systems.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.