Allegro voltage regulator provides LCD display bias
The A8601 from Allegro MicroSystems is a fixed-frequency, multiple-output voltage regulator IC designed to provide the LCD display bias in automotive infotainment applications.
The automotive grade AEC Q-100 qualified device produces five regulated outputs from one low-voltage supply.
The switching frequency can be either programmed or synchronised with an external clock signal between 350kHz and 2.25MHz 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 pre-programmed sequences to meet sequencing requirements of LCD panels.
There is short-circuit protection 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.