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Buck regulator power-supply IC with low quiescent current standby mode

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The new A8580 from Allegro MicroSystems Europe is a buck regulator power-supply IC that offers a high degree of flexibility in input voltage (4 to 40 V), switching frequency (250 kHz to 2.4 MHz), and output current (up to 2.5 A).

Designed to provide the power-supply requirements of next-generation car audio and infotainment systems, the new AEC Q100 qualified device incorporates all the control and protection circuitry required for a high-current regulator with ±1.0% output voltage accuracy.

A key feature of the A8580 is the use of pulse-frequency modulation (PFM) to produce a very low input quiescent current while supplying a “keep alive” voltage supply in standby mode. The IC is guaranteed to draw less than 50 μA from a 12 V input while supplying 3.3 V at 40 μA. In addition, to work down to idle-stop battery conditions, the A8580 will operate down to at least 3.6 V input with the input voltage falling.

Allegro MicroSystems Europe Ltd


Tel: +33 (0) 4 50512359

www.allegromicro.com

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