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2.5A buck regulator boasts low IQ standby mode

Posted: 27 May 2013 ?? ?Print Version ?Bookmark and Share

Keywords:Allegro? buck regulator? power supply? protection circuitry?

Allegro Microsystems has unveiled a new buck regulator that offers significant flexibility in input voltage (4 to 40V), switching frequency (250kHz to 2.4MHz) and output current (up to 2.5 A). The A8580 is aimed at power supply requirements of next generation car audio and infotainment systems. The device provides control and protection circuitry to produce a high current regulator with 1.0 per cent output voltage accuracy.

The A8580 employs pulse frequency modulation (PFM) for very low input current while supplying a "keep-alive" voltage supply. It draws less than 50A from 12VIN while supplying 3.3V/40A. The device also operates down to at least 3.6VIN to work down to idle-stop battery conditions.

Other features of this new device include switching frequency clock synchronisation, and an ultra-low current, shutdown mode requiring less than 5A. The A8580 has external compensation to accommodate a wide range of frequencies and external components, and provides a power on reset (NPOR) signal validated by the output voltage.

Extensive protection features include pulse-by-pulse current limit, hiccup mode short circuit protection, open/short asynchronous diode protection, BOOT pin open/short voltage protection, VIN under-voltage lockout, VOUT over-voltage protection and thermal shutdown.

Further information regarding the A8580 can be found here.

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