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Allegro MicroSystems adds new buck regulator to family of automotive-grade regulator ICs

Allegro MicroSystems adds new buck regulator to family of automotive-grade regulator ICs

07 January 2015

New 3.0 A device features low input-voltage dropout and enhanced idle/stop/start recovery operation -

The new A8590 buck regulator from Allegro MicroSystems Europe is the latest addition to the company’s industry-leading family of automotive-grade AEC-Q100 qualified regulator ICs.

The device has been designed to provide the power-supply requirements of next-generation car audio and infotainment systems, and provides all the control and protection circuitry for a 3 A regulator which will withstand the rigours of a wide automotive battery input voltage range. The A8590 can also be used in cluster and centre stack applications and in advanced driving assistance systems.

The A8590 employs pulse frequency modulation to draw less than 50 μA from a 12 V input while supplying a 3.3 V/40 μA output. After startup, the A8590 operates down to an input voltage (falling) of at least 3.6 V, and maintains ±1% output voltage accuracy.

Other features of the A8590 include PWM/PFM mode control and the ability to synchronise PWM frequency to an external clock. It also has a “sleep” pin for an ultra-low current shutdown mode.

The device has external compensation to accommodate a wide range of frequencies and external components, and provides a power-on reset 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 open/short voltage protection, input-voltage undervoltage lockout, output-voltage overvoltage protection, and thermal shutdown.

The A8590 is the latest addition to Allegro’s extensive family of low IQ automotive regulator ICs, which includes the A8585,  A8585-1 A8585-2, A8585-3 (automatic PWM/PFM), A8580, A8589, and now the A8590 (see table below). More information on this family is available from

The A8590KLPTR-T is supplied in a low profile 16-pin TSSOP package with exposed power pad. It is lead (Pb) free, with 100% matt-tin leadframe plating.

About Allegro
Allegro MicroSystems, LLC 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

Allegro MicroSystems Europe, headquartered in Chertsey, United Kingdom, is the European sales and marketing operation, and operates a network of representatives and distributors throughout Europe.  Allegro also has an engineering design centre in Edinburgh in Scotland and an application and marketing centre in Annecy in France.

  • Allegro MicroSystems, LLC
    115 Northeast Cutoff
    Worcester, MA 01606
    United States / America
    Tel.: +1-508-854-5359
    Web :
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