LTC1705EGN#PBF

Power Supply Controllers, Monitors Overview

The LTC1705EGN#PBF is a dual-channel synchronous step-down switching regulator controller manufactured by Analog Devices Inc. It features a fixed 650kHz switching frequency and operates within an input voltage range of 3.15V to 5.5V. The device provides two independent outputs with adjustable voltages from 900mV to 2V, supporting up to 20A output current per channel. It includes a 5-bit VID interface for processor core voltage regulation and integrates a 150mA LDO. Packaged in a 28-pin SSOP, it functions as a complete power supply controller designed for Intel Mobile Pentium processors.

Power Supply Controllers, Monitors Feature Summary

• Dual-channel synchronous buck topology with integrated control logic
• Five-bit VID interface for direct processor voltage selection
• Integrated low-dropout linear regulator for auxiliary power
• Fixed high-frequency operation for compact passive component sizing

Power Supply Controllers, Monitors Applications

• Complete power supply controller for Intel Mobile Pentium processors
• Multi-phase CPU core voltage regulation systems
• Portable computing devices requiring efficient DC-DC conversion
• Embedded systems utilizing synchronized buck converter architectures

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix #PBF indicates tube packaging versus TRPBF for tape and reel when sourcing. Confirm availability status as distribution channels may report limited stock or discontinuation. Ensure the SSOP-28 package matches the target PCB footprint requirements. Cross-reference the manufacturer datasheet for updated environmental compliance and RoHS status prior to final procurement decisions.

Power Supply Controllers, Monitors Selection Notes

Select this component for applications requiring dual independent regulated outputs driven by a single controller IC. The fixed 650kHz frequency allows for smaller inductors compared to lower-frequency alternatives. Verify that the required output voltage range falls within the 900mV to 2V specification. Consider the thermal performance of the SSOP-28 package for the expected load current density and ambient operating conditions.

Power Supply Controllers, Monitors Part Context

This part belongs to the LTC1705 series of dual synchronous switching regulator controllers. It is specifically engineered for mobile processor power delivery, distinguishing itself through the integration of VID decoding and an auxiliary LDO. The family focuses on simplifying the design of complex multi-rail power systems for legacy and specialized mobile computing platforms.

Power Supply Controllers, Monitors Replacement Considerations

The LTC1705EGN#TRPBF serves as the tape-and-reel variant of this component, offering identical electrical characteristics but differing only in packaging format. No other cross-model substitutes are confirmed in the provided documentation.