MAX1939EEI

Overview

The MAX1939EEI is a two-phase desktop CPU core supply controller manufactured by Analog Devices Inc./Maxim Integrated. It utilizes a Buck topology with a switching frequency of 500 kHz and supports up to 60 A output current. The device features a maximum duty cycle of 50% and an adjustable output voltage down to 2 V. It operates within a temperature range of -40°C to +85°C and is housed in a 28-pin QSOP package.

Feature Summary

• Two-phase control architecture for high-current desktop CPU applications
• Integrated controlled VID change capability for dynamic voltage adjustment
• Compact surface-mount packaging suitable for space-constrained designs

Applications

• Desktop computer motherboard CPU core power supplies
• High-performance microprocessor voltage regulation modules
• Edge computing hardware power management systems

Procurement Notes

Verify the specific suffix (e.g., EEI) against the manufacturer's official datasheet to confirm pinout and electrical specifications. Confirm RoHS compliance status as some sources indicate non-compliance while others suggest otherwise. Check for active production status or obsolescence notices directly from Analog Devices before procurement planning.

Selection Notes

Select this component for applications requiring precise two-phase control for desktop CPUs. Ensure the design accommodates the 28-QSOP package dimensions. Verify that the required output current does not exceed the 60 A limit and that the operating environment stays within the specified -40°C to +85°C range.

Part Context

This part belongs to the MAX1937/MAX1939 series of dual-phase controllers designed specifically for Intel-compatible desktop processors. It serves as a critical power management IC in legacy and specialized computing platforms, providing stable voltage regulation for central processing units.

Replacement Considerations

The MAX1937EEI+ is a documented alternative within the same product family offering similar two-phase control capabilities. Verify compatibility regarding pin assignments and thermal requirements when substituting.