APPARATUS COMPRISING A CHARGE PUMP AND LCD DRIVER COMPRISING SUCH AN APPARATUS.

摘要

Apparatus comprising a charge pump (20) with multiple independently regulatedoutputs (V1, V2) for providing different voltage levels at each of said outputs.The charge pump (20) comprises a low voltage input (12), on/off regulation (30),and at least two charge stages (11, 21) which are arranged in a cascaded manner.Each charge stage (11, 21) comprises a stage capacitor (16, 26), a switch (S1,S3), and a buffer (15, 25) for pumping a bottom plate of the stage capacitor (16,26).