SY20516ADPC - High Efficiency, 1MHz,1.2A Buck-Boost DC/DC Regulator


  • Fixed frequency operation with battery voltage above, below or equal to the output.
  • Four internal power switches to form true 4-switches buck-boost with single inductor.
  • Seamless buck-boost transition.
  • 2.6V to 5.5V Input Voltage Range.
  • 1.2A continuous output current capability.
  • Output disconnect at shutdown.
  • Power good indicator.
  • Compact package: DFN3x3-14
  • Built in thermal shut down protection, hard short protection.


SY20516A is a wide input voltage range, high efficiency, fixed frequency buck-boost converter that operates from input voltage above, below or equal to the output voltage. It provides a power supply for system powered by either a two-cell or three-cell alkaline, Ni-Cd or Ni-MH battery, or a one-cell Li-Ion or Li-polymer battery.
SY20516A can support for 1.2A load current capability. It is based on a fixed frequency, pulse-width-modulation (PWM) controller using synchronous rectification to obtain maximum efficiency. The output voltage and compensation circuit can be programmed using external resistors and capacitors network. During shutdown, the load is disconnected from the battery. The device is packaged in tight DFN3x3-14.


  • Palmtop Computers
  • Handheld Instruments
  • MP3/MP4 Players
  • Digital Cameras/Camcorders
  • Personal Medical Products
  • High Power LED’s
  • All two-cell and three-cell alkaline, Ni-Cd or Ni-MH or signal-cell Li battery powered products