ADP3155JRU-REEL7

Overview

The ADP3155JRU-REEL7 is a power management integrated circuit designed for Pentium III processors. It operates within a supply voltage range of 4.5 V to 5.25 V and features three independent output channels capable of delivering up to 6 A each. The device supports programmable sequencing with adjustable rise and fall times, ensuring precise voltage ramp control. It includes comprehensive protection mechanisms such as overcurrent, thermal shutdown, and undervoltage lockout. The component is housed in a 20-pin TSSOP package suitable for surface mount applications.

Feature Summary

• Provides triple-channel power sequencing for high-performance CPU cores
• Features programmable rise and fall time controls for voltage regulation
• Integrates overcurrent and thermal protection for system reliability

Applications

• Power management for Intel Pentium III processors
• Voltage sequencing in high-performance computing systems
• Multi-rail power distribution networks

Procurement Notes

Verify the exact suffix (REEL vs REEL7) against the manufacturer's current datasheet to ensure compatibility with specific tape-and-reel specifications. Confirm RoHS compliance status directly with Analog Devices Inc., as historical records may vary. Check for active production status and lead times through authorized distributors, as availability for legacy components can fluctuate significantly.

Selection Notes

Select this component when designing power supplies specifically for Pentium III architecture requiring synchronized multi-voltage rails. Ensure the design accommodates the 20-pin TSSOP footprint and thermal requirements. Verify that the input voltage range matches the system's 5 V rail stability. Consider the need for external programming resistors to set output voltages and timing parameters according to the processor's specification sheet.

Part Context

This part belongs to the ADP3155 series of power controllers developed by Analog Devices Inc. for legacy x86 processor platforms. It serves as a specialized solution for managing core, I/O, and memory voltages simultaneously. The series was widely used during the transition period of early 2000s desktop and server computing architectures.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Legacy power controllers for Pentium III may require direct replacement or redesign due to architectural differences in newer processors.