Patent ID: 7457068
Filing Date: 2008-11-25
Classification: G11B,H02M

Abstract:
1. A magnetic disk drive comprising: a magnetic recording medium; a magnetic head for writing/reading information to/from said magnetic recording medium; a position control unit of a high voltage block configured to operate at a first voltage to move said magnetic head relative to said magnetic recording medium; a main power supply unit configured to supply power of a predetermined voltage lower than the first voltage to a load of a low voltage block, said main power supply unit including a switching regulator; a determination unit configured to detect said power supplied from said main power supply unit to said load and to determine whether said detected power exceeds a predetermined power level; and a sub-power supply unit of the high voltage block configured, if said determination unit determines that said power supplied from said main power supply unit to said load exceeds said predetermined power level, to supply power of said predetermined voltage to said load, said sub-power supply unit including a linear regulator.