SY20217BQDC - High Efficiency Buck Converter with Low Power Mode and Output Voltage Selection


  • 2.5V to 5.5V Input Voltage Range
  • Low RDS(ON) for Internal Switches (PFET/NFET): 70mΩ / 40mΩ
  • 4A Continuous, 7A Peak Load Current Capability
  • +/-1% Output Voltage Accuracy at PWM Mode
  • PFM Mode at Light Load for High Efficiency
  • Selectable Fixed Output Voltage Through VID0, VID1 Pin
  • Support for Low Power Mode Logic Input
  • Typical 30µA Typical Quiescent Current
  • Ultra Fast Load Transient Performance
  • Flexible MODE Pull Down Resistor to Program the Required Power Rail
  • Power Good Indicator
  • OVP/SCP/OTP Latch Off Protection
  • RoHS Compliant and Halogen Free
  • Compact Package: QFN3x3-16

Typical Application


SY20217B is a high efficiency buck converter with low power mode and output voltage select function. The output voltage can be changed by the VID0, VID1, and   pins with dedicated setting slew rate. It therefore supports dynamic voltage scaling function target.
The SY20217B operates over a wide input voltage range from 2.5V to 5.5V. It is available in a QFN3x3-16 package.


  • NB Application