DA9281 is an 8-channel PMIC equipped with 4 buck regulators, 3 LDOs, and 1 voltage buffer to support DDR VTT termination. It provides key functions for power applications, including soft-start, selectable preset output voltage, and flexible power-up and power-down sequences. These functions are programmable via the I²C interface with non-volatile memory defaults. Additionally, all 8 channels have an output discharge function and various protection features such as over-current protection (OCP), over-voltage protection (OVP), and under-voltage protection (UVP).

• 4.5V to 5.5V input voltage
• Buck (CH1 to CH4)
  • Output current 5.0A at 0.8V to 3.0V (CH1)
  • Output current 2.5A at 0.8V to 3.3V (CH2)
  • Output current 2.5A at 0.8V to 3.6V (CH3)
  • Output current 2.5A at 0.8V to 3.3V (CH4)
  • Operation frequency 2MHz
  • Discharge function
  • Soft-start function
• LDO (CH6 to CH8)
  • Output current 0.2A at 2.5V (CH6)
  • Output current 0.2A at 1.8/3.3V (CH7)
  • Output current 1.6A at 1.8V (CH8)
  • Discharge function
  • Soft-start function
• Termination Voltage Regulator (CH5)
  • Output current -0.5A to 0.5A at CH4 = 1.2V or CH4 = 1.35V
  • Discharge function
  • Soft-start function
• I²C digital interface
• Protection features: OCP, OVP, UVP for all channels
• Parameters of the output voltage can be changed by I²C control
• Programmable sequencer by I²C control
• 40-QFN 5mm x 5mm package (0.4mm pitch)
• -40 °C to +85 °C ambient temperature range