LTC3618EFE

Special Purpose Regulators Overview

The LTC3618EFE is a dual synchronous buck converter designed for DDR termination, featuring a 4MHz switching frequency and 3A output per channel. It operates with an input voltage range of 2.25V to 5.5V and provides adjustable output voltages from 500mV to 2.5V. The device offers three outputs in a TSSOP-EP-24 package, drawing only 1µA in shutdown. It supports programmable phase shifts to minimize ripple and includes features like external synchronization and slew rate limiting for EMI reduction.

Special Purpose Regulators Feature Summary

• Dual-channel architecture with independent control for flexible power distribution
• Programmable phase shifting options to reduce input and output current ripple
• Integrated synchronous switches eliminate external catch diodes for improved efficiency
• External synchronization capability up to 4MHz for system-wide clock alignment

Special Purpose Regulators Applications

• DDR memory termination circuits
• Single Li-Ion battery powered systems
• Soft-start circuit implementations
• Low ripple single 6A output configurations using synchronized channels

Special Purpose Regulators Procurement Notes

Verify the specific suffix and tape/reel or tube packaging requirements against the manufacturer's latest datasheet before ordering. Confirm that the TSSOP-EP-24 thermal pad soldering process aligns with your assembly capabilities. Ensure the selected variant matches the required phase shift configuration for your specific ripple cancellation needs.

Special Purpose Regulators Selection Notes

Select this component when designing DDR termination networks requiring precise voltage regulation and low noise. Consider the 4MHz frequency for smaller passive components compared to lower frequency alternatives. Evaluate the need for phase shifting if input capacitor size must be minimized. Verify that the 2.25V minimum input voltage suits your source supply under all operating conditions.

Special Purpose Regulators Part Context

This part belongs to the LTC3615 family of dual synchronous step-down converters. While sharing similar core architectures, the LTC3618EFE is specifically optimized for DDR termination applications with defined output voltage ranges. It differs from standard dual converters by its focus on low ripple performance and specific pinout configurations suitable for high-density PCB layouts.

Special Purpose Regulators Replacement Considerations

The LTC3615EFE is a direct functional equivalent within the same family. Verify pin compatibility and output voltage ranges when substituting. The LTC3615EFE-1 offers different phase shift options for single high-current applications.