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DA9281

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8-Channel System PMIC Supporting DDR VTT

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Features

  • 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
Find Other Products in Multi-Channel Power Management ICs (PMICs)
DA9281 Block Diagram

Description

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).

Parameters

Attributes Value
Function PMIC
Outputs (#) 8
Input Voltage (Min) (V) 4.5
Input Voltage (Max) (V) 5.5
Output Current Max (A) 5
Battery Interface No
Integrated Battery Charger No
USB-Power Management No
GPIOs (#) 0
Bus Voltage (Max) (V) 5, 5.5
Integrated step-down DC/DC Converter Channels (#) 4
Comm. Interface I2C

Package Options

Pkg. Type Pkg. Dimensions (mm) Lead Count (#) Pitch (mm)
QFN-40 5x5 40 0.4

Product Comparison

DA9281 DA9080 RAA215300
VIN Range 4.5 - 5.5 4.0 - 5.5 2.7 - 5.5
Integrated step-down DC/DC Converter Channels (#) 4 4 6
LDOs 3 1 3
Pkg. Type QFN-40 QFN-32 QFN

Applications

  • Industrial MPU System Power
  • Embedded Computing/SOM
  • FPGA/DSP Power Supply
  • IoT/HMI Terminal

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