ISL6539IA-T

Special Purpose Regulators Overview

The ISL6539IA-T is a dual PWM controller designed for high-efficiency voltage regulation in DDR, DDR2, and DDR3 memory systems. It integrates two synchronous buck DC/DC converters with a wide input voltage range of 3.3V to 18V. The device provides two independent output channels, each adjustable from 0.9V to 5.5V. Operating within a commercial temperature range of 0°C to 70°C, it utilizes a 28-SSOP package. This component serves as a complete power solution for demanding memory applications requiring tight regulation.

Special Purpose Regulators Feature Summary

• Dual synchronous buck DC/DC converter architecture for efficient power delivery
• Wide input voltage capability supporting 3.3V to 18V sources
• Adjustable output voltage range from 0.9V to 5.5V per channel
• Integrated control logic optimized for DDR, DDR2, and DDR3 memory standards

Special Purpose Regulators Applications

• DDR1 memory system power supplies
• DDR2 memory system power supplies
• DDR3 memory system power supplies

Special Purpose Regulators Procurement Notes

Verify the obsolete status of this part number before design finalization. Confirm package compatibility with existing footprints. Check for RoHS compliance requirements against current project specifications. Evaluate alternative components if long-term supply stability is required. Ensure thermal management aligns with the specified operating temperature range.

Special Purpose Regulators Selection Notes

Select this controller when designing power stages for legacy or specific DDR memory interfaces. Consider the dual-output capability for generating multiple voltage rails simultaneously. Verify that the input voltage range matches the system's available power source. Assess board space constraints regarding the 28-SSOP package dimensions. Ensure the application does not require extended industrial temperature ranges beyond 70°C.

Special Purpose Regulators Part Context

This component belongs to the ISL6539 family of dual PWM controllers manufactured by Renesas Electronics. It is specifically engineered to meet the power integrity requirements of SDRAM and DDR-based memory architectures. The device simplifies design by integrating control loops for two synchronous buck converters into a single compact package.

Special Purpose Regulators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The product status is listed as obsolete. Designers should consult manufacturer resources for current generation alternatives compatible with DDR memory power requirements.