PM6675TR

Overview

The PM6675TR is a dual-output power management IC from STMicroelectronics, integrating a high-efficiency step-down switching controller and an independent Low Drop-Out (LDO) linear regulator. It operates within a 4.5 V to 28 V input voltage range and features Constant On-Time (COT) architecture for fast transient response. The switching section supports adjustable output voltages from 0.6 V to 3.3 V with selectable current limits of ±1 A or ±2 A. The LDO also provides an adjustable 0.6 V to 3.3 V output. Packaged in a 24-VFQFPN (4x4 mm) surface-mount format, it includes dedicated power-good signals and soft-start/soft-end functions.

Feature Summary

• Integrates a Constant On-Time buck controller and an independent LDO regulator in a single package
• Supports low-noise operation with a selectable minimum switching frequency of 33 kHz
• Features internal compensation for DC voltage error due to output ripple
• Provides active soft-end functionality on both switching and linear regulator outputs

Applications

• Audio-sensitive applications requiring low-noise power conversion
• Systems supporting ceramic output capacitors
• Power supply designs requiring wide input voltage ranges up to 28 V
• Applications needing simultaneous switching and linear regulation outputs

Procurement Notes

Verify component authenticity through authorized channels as the PM6675TR is listed as obsolete by the manufacturer. Confirm that the 24-VFQFPN package dimensions match your PCB footprint requirements. Ensure compatibility with the specified 4.5 V to 28 V input range for your target application. Check for RoHS3 compliance status if environmental regulations apply to your production line.

Selection Notes

Select this device when a combined solution for high-efficiency switching and low-noise linear regulation is required. The COT architecture allows support for both electrolytic and ceramic output capacitors, simplifying design. Consider the 33 kHz mode for audio applications to avoid audible noise. Verify that the integrated current limits meet the load requirements without external sensing components.

Part Context

The PM6675 belongs to STMicroelectronics' PMIC portfolio, designed for compact power management solutions. It utilizes a 24-pin VFQFPN package suitable for space-constrained designs. The device integrates protection features including overvoltage and undervoltage latching. It is part of a series offering configurable power stages for various industrial and consumer electronics applications.

Replacement Considerations

The PM6675TR is marked as obsolete. Consult official replacement guides for compatible successors within the PM66xx series. Verify pinout compatibility before substituting with newer models. Ensure that alternative devices support similar input voltage ranges and output configurations.