LTC7805RUFDM#PBF

DC DC Switching Controllers Overview

The LTC7805RUFDM#PBF is a dual synchronous step-down controller from Analog Devices, designed for high-efficiency power conversion. It operates with an input voltage range of 4.5 V to 40 V and supports output voltages from 800 mV to 40 V. The device features a fixed switching frequency of 3 MHz and delivers up to two independent outputs. It exhibits low quiescent current of 14 uA and low shutdown current of 180 uA. The controller supports 100% duty cycle operation and includes spread spectrum capability to reduce EMI. It is housed in a 28-lead QFN package rated for junction temperatures between -40°C and +150°C.

DC DC Switching Controllers Feature Summary

• Dual-channel architecture enabling independent control of two synchronous buck converters
• Low quiescent and shutdown currents optimized for battery-powered applications
• Integrated spread spectrum modulation to minimize electromagnetic interference
• Supports 100% duty cycle operation for minimal voltage drop applications

DC DC Switching Controllers Applications

• Industrial equipment power distribution
• Telecommunications infrastructure systems
• Automotive electronics modules

DC DC Switching Controllers Procurement Notes

Verify the specific suffix #PBF confirms lead-free compliance and RoHS standards before procurement. Confirm the RUFDM package variant matches your PCB footprint requirements. Ensure the operating temperature range aligns with your system's thermal environment. Cross-reference the datasheet revision date to ensure compatibility with your design specifications.

DC DC Switching Controllers Selection Notes

Select this component when dual isolated or non-isolated buck rails are required from a single input source. The 3 MHz frequency allows for smaller passive components compared to lower frequency alternatives. Consider the 40 V maximum input limit against your system's supply voltage. Evaluate the thermal performance of the QFN package under your expected load conditions.

DC DC Switching Controllers Part Context

This part belongs to the LTC7805 family of low IQ synchronous step-down controllers. It shares architectural similarities with other high-voltage buck controllers but is specifically optimized for dual-output configurations. The series emphasizes efficiency and compact design for space-constrained industrial and automotive environments.

DC DC Switching Controllers Replacement Considerations

Public documentation lists LTC7151SIV#PBF as an alternative part number alias for this component. Verify functional equivalence and pinout compatibility before substitution.