This document introduces the features of PM6675AS high efficiency step-down controller, including input voltage range, optional fixed output voltage, adjustable output voltage, reference voltage, negative load transient response, current sensing, overvoltage protection, undervoltage protection, soft-start, optional pulse skipping, no-audible pulse skip mode, ceramic output capacitor support, output voltage ripple compensation, output soft-end etc.
The PM6675AS is a high-efficiency step-down controller integrated with an independent low-drop-out (LDO) linear regulator. It utilizes a constant-on-time (COT) architecture to ensure fast transient response and supports both electrolytic and ceramic output capacitors. The device includes selectable low-consumption modes and a low-noise option with a minimum switching frequency of 33 kHz for audio-sensitive applications.
The controller features an embedded integrator control loop to compensate for DC voltage error due to output ripple. It offers selectable current limits for the LDO section (+1 A or +2 A) and includes dedicated power-good signals for both the switching and LDO regulators. The device is designed for industrial applications on 24 V, graphic cards, and embedded computer systems.
| Input voltage range | 4.5 V to 36 V |
|---|---|
| Output voltage range (Switching) | 0.6 V to 3.3 V |
| Output voltage (Fixed) | 1.5 V |
| LDO Output voltage range | 0.6 V to 3.3 V |
| LDO Current limit | +1 A or +2 A |
| Switching frequency (Low-noise mode) | 33 kHz |
| Soft-start time | 3 ms |
| Operating ambient temperature | -40 to 85 °C |
| Package | VFQFPN-24 4x4 |
The input voltage range is 4.5 V to 36 V.
Yes, it supports both electrolytic and ceramic output capacitors.
The LDO regulator has selectable current limits of +1 A or +2 A.
The minimum switching frequency is set to 33 kHz in low-noise mode.