The new A8654 from Allegro MicroSystems Europe is a high-output current synchronous buck regulator IC that can produce a 3A steady-state load current from an input voltage ranging from 4-36V.
The new device integrates low “on” resistance high-side MOSFETs and low-side n-channel MOSFETs, and utilizes external compensation to accommodate a wide range of power components. It uses pulse-width modulation (PWM) current mode control to provide simple compensation, excellent loop stability and fast transient response. The A8654 remains operational even when the input drops as low as 2.6V. When the input voltage approaches the output voltage, the duty cycle is maximised to maintain the output voltage. Other key features include externally set soft-start time, an external compensation network for power-train optimisation and others.