ADP3152AR

Overview

The ADP3152AR is a highly efficient synchronous switching regulator controller manufactured by Analog Devices Inc. It is specifically optimized for Pentium II processor applications, stepping down 5 V to digitally controlled output voltages between 1.8 V and 3.5 V. The device utilizes a 5-bit DAC to read voltage identification codes directly from the processor. It employs a current mode constant off-time architecture to drive two N-channel MOSFETs in a synchronous rectified buck converter at a maximum switching frequency of 250 kHz.

Feature Summary

• Integrates a 5-bit digital-to-analog converter for direct reading of processor voltage identification codes
• Utilizes current mode constant off-time architecture for precise output voltage generation
• Provides integrated overvoltage protection crowbar functionality
• Ensures guaranteed short circuit protection and adjustable current limiting

Applications

• Pentium II Processor power supply systems
• AMD-K6 Processor +12V power regulation
• VRM 8.2 compatible designs
• Synchronous buck converters requiring transient compliance

Procurement Notes

Verify the specific suffix AR against the manufacturer's official datasheet to confirm package type and temperature range specifications. Ensure compatibility with the target processor's voltage identification requirements before integration. Cross-reference the component number with authorized distributors to confirm current availability status and lead times.

Selection Notes

Select this controller when designing power stages for legacy Intel Pentium II or AMD K6 processors requiring precise voltage regulation. The integrated VID decoding simplifies board layout by reducing external components. Consider the 250 kHz switching frequency and synchronous rectification capabilities for efficiency optimization in space-constrained applications.

Part Context

This component belongs to Analog Devices' portfolio of power management integrated circuits designed for high-performance computing applications. It addresses the stringent transient response specifications mandated by major processor manufacturers. The device represents a specialized solution for voltage regulation modules (VRMs) in personal computer architectures from the late 1990s.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pinout and electrical parameter compatibility if considering alternative synchronous buck controllers from other manufacturers.