Multi-output voltage regulator IC for LCD display bias in automotive infotainment applications

Date
05/03/2012

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The new A8601 from Allegro MicroSystems Europe is a fixed-frequency, multiple-output voltage regulator IC designed to provide the LCD display bias in automotive infotainment applications. The A8601, which is Automotive Grade AEC Q-100 qualified, produces five regulated outputs from one low-voltage supply. It offers a robust solution in automotive applications that uses fewer components than existing solutions, while providing higher efficiency power conversion. The switching frequency of the A8601 can be either programmed or synchronised with an external clock signal between 350 kHz and 2.25 MHz to minimise interference with AM and FM radio bands. The five output voltages are provided from three linear regulators and two charge-pump regulators. Each output voltage can be adjusted independently. During power-up and shutdown, the outputs are turned on and off in preprogrammed sequences to meet sequencing requirements of LCD panels while simplifying design. The device is extremely robust under fault conditions. Short-circuit protection is provided for all outputs; the boost switch is protected against overcurrent and overvoltage conditions, and input disconnect protection is achieved by driving an external p-type MOSFET. The A8601 is available in a 28-pin, eTSSOP package with an exposed thermal pad to allow for operation at high ambient temperatures. www.allegromicro.com

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