Controller 24-Pin VFQFPN T/R

The PM6675AS device consists of a single high efficiency step-down controller and an independent low drop-out (LDO) linear regulator.The constant on-time (COT) architecture assures fast transient response supporting both electrolytic and ceramic output capacitors. An embedded integrator control loop compensates the DC voltage error due to the output ripple.Selectable low-consumption mode allows the highest efficiency over a wide range of load conditions. The low-noise mode sets the minimum switching frequency to 33 kHz for audio-sensitive applications. The LDO linear regulator can sink and source up to 2 Apk. Two fixed current limit (±1 A- ±2 A) can be chosen.An active soft-end is independently performed on both the switching and the linear regulators outputs when disabled.

Switching section 4.5 V to 36 V input voltage range 0.6 V, ±1 % voltage reference Selectable 1.5 V fixed output voltage Adjustable 0.6 V to 3.3 V output voltage 1.237 V ±1 % reference voltage available Very fast load transient response using constant-on-time control loop No R_SENSE current sensing using low side MOSFETs" R_DS(ON) Negative current limit Latched OVP and UVP Soft-start internally fixed at 3 ms Selectable pulse skipping at light load Selectable No-audible (33 kHz) pulse skip mode Ceramic output capacitors supported Output voltage ripple compensation Output soft-end

LDO regulator section Adjustable 0.6 V to 3.3 V output voltage Selectable ±1 Apk or ±2 Apk current limit Dedicated power-good signal Ceramic output capacitors supported Output soft-end