PM6675A Datasheet | STMicroelectronics

.. High efficiency step-down controller with embedded 2A LDO regulator Target Specification Features switching - Switching section - 4.5V to 36V input voltage range - 0.6V, ±1% voltage reference - Selectable 1.5V fixed output voltage - Adjustable 0.6V to 3.3V output voltage - 1.237V ±1% reference voltage available - Very fast load transient response using constant-on-time control loop - No RSENSE current sensing using low side MOSFETs' RDS(ON) - Negative current limit - Latched OVP and UVP - Soft start internally fixed at 3ms - Selectable pulse skipping at light load - Selectable No-Audible (33KHz) pulse skip mode - Ceramic output capacitors supported - Output voltage ripple pensation - Output soft-end LDO regulator section - Adjustable 0.6V to 2.5V output voltage - Selectable ±1Apk or ±2Apk current limit - Dedicated power-good signal - Ceramic output capacitors supported - Output soft-end VFQFPN-24 4x4 Description The PM6675A 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 pensates 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 33k Hz for audio-sensitive applications. The LDO linear regulator can sink and source up to 2Apk. Two fixed current limit (±1A- ±2A) can be chosen. An active Soft-End is independently performed on both the switching and the linear regulators outputs when disabled. - Applications - -...