Product overview
Description
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.
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All features
- 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 RSENSE current sensing using low side MOSFETs' RDS(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
- Switching section
EDA Symbols, Footprints and 3D Models
The STMicroelectronics team - PM6675AS
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