PM6670STR

Power Management - Specialized Overview

The PM6670STR is a complete DDR2/3 memory power supply controller manufactured by STMicroelectronics. It integrates a Constant On-Time (COT) buck controller, a 2 Apk sink/source Low Drop Out regulator, and a 15 mA low noise buffered reference. The device supports an input voltage range of 4.5 V to 36 V and provides adjustable output voltages from 0.9 V to 2.6 V for the switching section. It operates within a temperature range of -40°C to +85°C and is housed in a 24-VFQFPN package.

Power Management - Specialized Feature Summary

• Integrates a COT buck controller with no RSENSE current sensing using low side MOSFETs' RDS(ON).
• Includes a 2 Apk LDO with foldback capability for VTTR remote sensing.
• Supports system sleep states S3 and S4/S5 with high impedance outputs.

Power Management - Specialized Applications

• DDR2 memory power supply regulation
• DDR3 memory power supply regulation
• JEDEC compliant memory subsystems

Power Management - Specialized Procurement Notes

Verify component authenticity through authorized channels as this part may be subject to obsolescence notices. Confirm package marking and datasheet revision against official STMicroelectronics documentation prior to integration. Ensure ESD handling protocols are followed during storage and assembly due to moisture sensitivity classification.

Power Management - Specialized Selection Notes

Select this controller for designs requiring integrated DDR2/3 power management with fast transient response capabilities. Consider the COT architecture benefits for supporting both electrolytic and ceramic output capacitors. Evaluate thermal performance requirements given the 2 Apk LDO rating and operating temperature range up to 85°C.

Power Management - Specialized Part Context

The PM6670AS series belongs to STMicroelectronics' portfolio of dedicated PMICs for memory applications. It is designed to meet JEDEC specifications for DDR2 and DDR3 memory systems. The device combines switching and linear regulation technologies to provide efficient power delivery with precise voltage control for modern memory interfaces.

Power Management - Specialized Replacement Considerations

Public confirmed substitute part numbers: PM6670ASTR, PM6670ATR, PM6670ASCT. Verify pin compatibility and electrical specifications before substitution.

Power Management - Specialized FAQ

Does the PM6670 support ceramic output capacitors?

Yes, the COT architecture assures fast transient response supporting both electrolytic and ceramic output capacitors.

What is the maximum output current of the integrated LDO?

The device integrates a 2 Apk sink/source Low Drop Out regulator.