AP2972A is simple,  easy  to  use, 2A  synchronous  step-down (Buck) convertor in  SOT-23-6L package, with high efficiency and  fast transient response. AP2972A operates over  a wide  input  voltage range  from  4.5V to  16V  and integrates main  switch and synchronous switch  with very low  RDS(ON) to  minimize  the  conduction loss.  AP2972A adopts  the active  constant on  time  PWM architecture  to achieve  fast  transient  responses  for  high  step  down  applications and high efficiency at light loads. In addition,it keeps in constant frequency of 500kHz under heavy load conditions to minimize  the size of inductor and  capacitor.Fault conditions also  include cycle-by-cycle current limit,output under  voltage  protection, output over current protection, output  short-circuit  protection  and  thermal shutdown

   Integrated 130-mΩ and 120-mΩ FETs
   4.5-16V input voltage range
   2A load current capability
   Active constant on time PWM architecture with 500kHz      switching frequency
   Internal soft-start limits the inrush current
   2% 0.6V reference
   Compact package: SOT-23-6L


Applications

  Set Top Box
  Portable TV
  Access Point Router