PM6670ASTR

Power Management - Specialized Overview

The PM6670ASTR is a complete DDR2/3 memory power supply controller manufactured by STMicroelectronics. It integrates a Constant On-Time (COT) buck controller, a 2 A sink/source Low Dropout (LDO) 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 900 mV to 2.6 V for the switching section. It operates within a temperature range of -40°C to +125°C and features a 24-pin VFQFPN package with dimensions of 4x4 mm.

Power Management - Specialized Feature Summary

• Integrates a COT buck controller for fast transient response supporting both electrolytic and ceramic output capacitors.
• Includes a 2 A LDO for memory termination voltage with foldback protection and remote sensing capability.
• Provides embedded integrator control loop compensation for DC voltage error due to output ripple.
• Supports system sleep states S3 and S4/S5 with high-impedance LDO output and tracking discharge.

Power Management - Specialized Applications

• DDR2 memory power supply regulation
• DDR3 memory power supply regulation
• System sleep state management (S3, S4/S5)

Power Management - Specialized Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors or certified partners. Confirm RoHS compliance status and moisture sensitivity level (MSL 3) prior to storage and handling. Check for end-of-life status and availability of alternative sources if production continuity is required. Ensure proper ESD protection during assembly due to surface mount packaging.

Power Management - Specialized Selection Notes

Select this component for designs requiring integrated DDR2/3 power management with minimal external components. Consider the wide input voltage range and adjustable output for flexible system architectures. Evaluate thermal performance given the 24-VFQFPN package and operating temperature range. Verify compatibility with specific memory types and system sleep requirements before finalizing the design.

Power Management - Specialized Part Context

The PM6670AS series belongs to STMicroelectronics' portfolio of specialized power management ICs designed for memory applications. It addresses the need for compact, efficient power solutions in systems utilizing DDR2 or DDR3 memory modules. The integration of switching and linear regulation simplifies board layout and reduces overall component count compared to discrete solutions.

Power Management - Specialized Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The product status is listed as End-of-Life (EOL). Engineers should consult official STMicroelectronics resources for current alternatives or obsolescence notices.