LTC3634EFE

Special Purpose Regulators Overview

The LTC3634EFE is a dual-channel monolithic synchronous step-down regulator designed for DDR1, DDR2, and DDR3 SDRAM controllers. It provides power supply and bus termination rails with an operating input voltage range of 3.6V to 15V. The device supports output voltages from 0.6V to 3V and delivers up to 3A per channel. It features a 4MHz switching frequency and operates within a temperature range of -40°C to +125°C. Packaged in a 28-TSSOP-EP, it offers high efficiency suitable for point-of-load applications.

Special Purpose Regulators Feature Summary

• Dual-channel synchronous buck topology for independent or combined outputs
• Integrated bus termination capability for SDRAM controller support
• High switching frequency enables compact external component sizing
• Wide input voltage compatibility for standard system rails

Special Purpose Regulators Applications

• DDR1, DDR2, and DDR3 SDRAM controller power supplies
• Bus termination rail generation for memory interfaces
• Point-of-load regulation from 5V or 12V inputs
• Battery-powered systems requiring efficient DC-DC conversion

Special Purpose Regulators Procurement Notes

Verify the specific suffix 'EFE' against official Analog Devices documentation to confirm package type and temperature grade. Ensure the order includes the '#PBF' designation if lead-free compliance is required. Cross-reference the manufacturer part number with authorized distributors to confirm current availability and authenticity before procurement.

Special Purpose Regulators Selection Notes

Select this component when designing for DDR memory architectures requiring integrated VTT termination. Evaluate thermal performance based on the 28-TSSOP-EP package and expected load currents. Confirm that the 3.6V minimum input voltage aligns with the system's available power rails. Consider the 4MHz frequency for balancing efficiency and passive component size.

Special Purpose Regulators Part Context

The LTC3634 belongs to a family of high-efficiency dual-channel regulators optimized for memory applications. It integrates power switches and control circuitry into a single monolithic solution. This design reduces board space compared to discrete implementations. The series supports various DDR standards, providing a standardized approach to powering complex memory subsystems in computing platforms.

Special Purpose Regulators Replacement Considerations

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