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Quadruple Output Regulator suits car infotainment applications.

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Press Release Summary:

November 14, 2012 - Model A8600 power management IC includes 3 asynchronous regulators, one of which is always on and operates down to at least 3.6 VIN while drawing less than 50 µA from 12 VIN. Available in 48-pin LQFP, product has EN/SYNC input for on/off or to increase/decrease base PWM frequency; 4 adjustable soft-start times; and 4 external compensation pins. Two high-side switches block reverse current. Also included are pulse-by-pulse current limit and short circuit, BOOT voltage, and over-voltage protection.

Allegro Microsystems, Inc.

115 N.E. Cutoff, P.O. Box 15036, Worcester, MA, 01615, USA

Original Press Release

Allegro MicroSystems, Inc. Announces New Quadruple Output Regulator for Automotive Infotainment

Press release date: October 30, 2012

Highly-Integrated Power Management IC

Worcester, MA – Allegro MicroSystems, Inc. announces the release of a new, highly-integrated power management IC that is designed to provide the power supply requirements of next generation car audio and infotainment systems. Allegro’s A8600 device provides all the control and protection circuitry needed to produce four high current regulators each with 1.5% accuracy.

The A8600 includes control circuitry to implement three adjustable, asynchronous buck regulators with integrated MOSFETs. Also, the A8600 provides the control circuitry, gate drivers, and current sensing to implement a synchronous buck regulator with external MOSFETs. Of the three asynchronous regulators, one is an "Always-On" type of buck regulator that operates down to at least 3.6 VIN (VIN falling). In standby mode, the "always On" regulator draws less than 50 µA from 12 VIN while employing pulse frequency modulation (PFM) to deliver 3.3 V/40 µA via the Always-ON regulator. Features of the A8600 include an EN/SYNC input to either turn the A8600 ON/OFF or increase/decrease the base PWM frequency, four adjustable soft-start times and four external compensation pins. Output voltage monitoring of the three switchers is provided by a single, open-drain, PowerOK (POK) output.

In addition, the A8600 provides two high-voltage, high-side switches with fold back over current protection for passing a voltage while passing a current of up to 450 mA and limiting the current to 100 mA during foldback. The two high-side switches actively block reverse current.

The A8600 also provides direct battery (BU) and switched accessory battery (ACC) detectors and a mute pulse output with an adjustable delay. Protection features of the A8600 include pulse-by-pulse current limit, hiccup mode short circuit protection, asynchronous diode protection, BOOT voltage protection, under-voltage lockout, over-voltage protection and thermal shutdown.

The A8600KLPTR-T device is available in a 48-pin LQFP with exposed pad (suffix JP) for enhanced thermal performance. It is priced at $7.09 in quantities of 1,000.

Allegro MicroSystems, Inc. is a leader in developing, manufacturing and marketing high-performance semiconductors. Allegro's innovative solutions serve high-growth applications within the automotive market, with additional focus on office automation, industrial, and consumer/communications solutions. Allegro is headquartered in Worcester, Massachusetts (USA) with design, applications, and sales support centers located worldwide. Further information about Allegro can be found at www.allegromicro.com .

Contact information:
Stephanie A. Fennelly
Director, Marketing Communications
Tel: (508) 854-5363
sfennelly@allegromicro.com

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