Automotive buck regulator IC with input voltage range

The new A8585 from Allegro MicroSystems Europe is an automotive buck regulator IC designed to provide the low quiescent current power-supply requirements for next-generation car audio and infotainment systems.

The new automotive AEC-Q100 qualifi ed device incorporates all the control and protection circuitry required for a high-current regulator with ±1.0% output voltage accuracy. It operates over a wide input voltage range from 4V to 35V and offers a choice of pulse-width-modulated (PWM) or pulse-frequencymodulated (PFM) operating modes.

In PWM mode, the device employs current-mode control to provide simple compensation, excellent stability and fast transient response. In low IQ (quiescent current) mode, the A8585 employs pulse frequency modulation to draw less than 33μA from an input of 12V, while providing an output of 5.0V/40μA. The transition from PWM to PFM mode can be controlled by the user (A8585, A8585-1) or it can occur automatically (A8585-2, A8585-3).