Controller IC Chip - MOSFET NB669GQZ NB669GQ NB669 chip for laptop - Ολοκληρωμένο τσιπ φορητού υπολογιστή (Κωδ.1-CHIP0726) Synchronous Buck Converter With LDO The  NB669  is  a  fully  integrated  high  frequency  synchronous  rectified  step-down  switch  mode  converter  with  5V  fixed  output  voltage.  It  offers  very compact solution to achieve 6A continuous output current and 9A peak output current over a  wide  input  supply  range  with  excellent  load  and line regulation. The NB669 operates at high efficiency over a wide output current load range.  Constant-On-Time      (COT)      control      mode      provides fast transient response and eases loop stabilization. Under voltage lockout is internally set as 4.15 V. An  open  drain  power  good  signal  indicates  the  output is within its nominal voltage range. NB669  also  provides  a  5V  LDO,  which  can  be  used to power the external peripheries, such as the  keyboard  controller  in  the  laptop  computer.  A  300kHz

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