PM6675ASTR

Overview

The PM6675ASTR is a power management IC from STMicroelectronics, featuring a high-efficiency step-down controller and an embedded 2A LDO regulator. It operates with an input voltage range of 4.5V to 36V. The switching section utilizes Constant-On-Time (COT) architecture for fast transient response and supports adjustable output voltages from 0.6V to 3.3V. The integrated LDO provides sink/source current up to 2Apk with selectable current limits. The device is housed in a 24-VFQFPN package.

Feature Summary

• Integrates a high-efficiency step-down controller with Constant-On-Time architecture for rapid load transient response.
• Includes an independent low-dropout linear regulator capable of sourcing and sinking up to 2Apk.
• Features selectable low-consumption modes and a low-noise mode setting the minimum frequency to 33kHz.
• Supports ceramic output capacitors with embedded integrator control loop compensation.

Applications

• Audio-sensitive applications requiring low-noise operation
• Systems supporting both electrolytic and ceramic output capacitors
• Power supply designs requiring wide input voltage ranges

Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors or certified partners. Confirm the specific suffix 'STR' indicates tape-and-reel packaging if required for automated assembly processes. Ensure compliance with RoHS directives as indicated in official documentation. Check for obsolescence status prior to final design implementation.

Selection Notes

Select this component when a combined buck controller and high-current LDO solution is needed within a single package. Consider the COT architecture for applications demanding fast transient responses without external compensation networks. Evaluate the 33kHz low-noise mode suitability for audio circuits. Verify that the 24-pin VFQFPN package fits the available PCB real estate constraints.

Part Context

This part belongs to the PM6675 family of power management devices designed by STMicroelectronics. It complements other controllers like the PM6670AS for memory power supplies but offers distinct integration of a high-current LDO alongside the switching controller. The family targets efficient power conversion in compact industrial and consumer electronics applications.

Replacement Considerations

Consult official STMicroelectronics documentation for qualified substitute part numbers. Verify pin compatibility and electrical specifications before replacing obsolete components. No direct public substitutes are confirmed in the provided data.