SY21618QEC (SY9228QEC)

•  Bidirectional Power Delivery: Source Mode and Sink Mode
• 4V to 28V Input Voltage Range
• Low R DS(ON) for Internal Switches: 19mΩ
• Internal soft-start
• Support Interrupt for Status Feedback
• Optional External P-channel FET Driver
• Cable Impedance Compensation
• 8-bit ADC for Output Voltage, Input Voltage and Output Current Detection
• Fully Protected for Output Over Current, Short-circuit and Over-temperature
• I2C Compatible Interface
  • Support Interrupt for Status Feedback
  • Selectable Switching Frequency: 250kHz, 500kHz, 750kHz, 1MHz
  • VBUS Output Voltage can be Configured in 0.1V per Step from 3.6V to 21V
  • Selectable Inductor Current Limit and Output Current Limit
• Compact Package: QFN5×5-32
• UL Certificate Number E491480
• IEC 62368-1 Certified

The SY21618 is a high voltage Buck-boost converter for USB power delivery applications. With user-selectable source mode and sink mode, it features bidirectional power delivery. In source mode, the output voltage VVBUS can be controlled in 0.1V per step from 3.6V to 21V. In sink mode, the output voltage VBAT is adjustable with an external resistor divider. The four integrated low RDS(ON) switches minimize the conduction loss.

The SY21618 integrates an I2C compatible interface for mode selecting, output voltage setting, frequency setting, protection setting, and etc.

The device is available in compact QFN5×5-32 package.