LTC3634MPFE

Special Purpose Regulators Overview

The LTC3634MPFE is a high-efficiency, dual-channel monolithic synchronous step-down regulator manufactured by Analog Devices Inc. It provides power supply and bus termination rails for DDR1, DDR2, and DDR3 SDRAM controllers. The device operates with an input voltage range of 3.6V to 15V, making it suitable for point-of-load applications from 5V or 12V inputs. It features two independent channels with adjustable output voltages ranging from 0.6V to 3V. Each channel supports up to 3A of output current. The component is housed in a 28-TSSOP-EP package and is rated for operation temperatures between -40°C and 125°C.

Special Purpose Regulators Feature Summary

• Dual-channel architecture providing independent regulation for VCC and VTT rails
• Integrated synchronous buck topology for high efficiency
• Supports DDR memory controller power requirements

Special Purpose Regulators Applications

• DDR1 SDRAM controller power supply
• DDR2 SDRAM controller power supply
• DDR3 SDRAM controller power supply
• Point-of-load power supply from 5V or 12V inputs

Special Purpose Regulators Procurement Notes

Verify the specific suffix 'MPFE' against official Analog Devices documentation to confirm military-grade temperature ratings and qualification status. Ensure the ordering part number matches the exact package and thermal pad configuration required for your PCB layout. Cross-reference the datasheet revision date to ensure compatibility with your design specifications.

Special Purpose Regulators Selection Notes

Select this component when designing systems requiring separate regulated rails for SDRAM core voltage and termination voltage. It is appropriate for applications needing dual outputs from a single IC to save board space. Consider the input voltage range and thermal dissipation capabilities relative to the expected load current and ambient operating conditions.

Special Purpose Regulators Part Context

This part belongs to the LTC3634 family of dual synchronous step-down regulators designed specifically for memory applications. It shares functional similarities with other DDR power management ICs but offers integrated dual-channel control. The MPFE suffix typically indicates extended industrial or military temperature ranges compared to standard commercial variants.

Special Purpose Regulators Replacement Considerations

Check for direct pin-compatible alternatives within the Analog Devices portfolio that support similar DDR standards. Verify if newer generations offer improved efficiency or lower quiescent current while maintaining the same package footprint.