The RT5028A is a highly-integrated low-power high-performance analog SOC with PMIC in one single chip designed for Industrial/Automotive applications.

The RT5028A includes four synchronous step-down DC-DC converters and eight LDOs for system power.

The RT5028A also embeds one EEPROM (MTP) for setting sequence and timing etc.

Additionally, the RT5028A PMIC also includes one IRQ report.


  • Industrial/Automotive
Key Spec.
Status Active
Vin (min) (V) 3.3
Vin (max) (V) 5.5
Number of Channels 12
Number of Buck Converters 4
Number of LDO Regulators 8
Application Automotive
Features AEC-Q100;Adjustable Frequency;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;I2C;Internal Compensation;OCP;OVP;Power Good;UVP
Package Type WQFN7x7-56
  • Input Voltage Operating Range is 3.3V to 5.5V
  • Step-Down Regulator : VIN Range is 3.3V to 5.5V
    ► Max Current 2.4A/2A/1.6A/2A
    ► Programmable Frequency from 500kHz to 2MHz
    ► I2C Programmable Output Level
    ► I2C Programmable Operation Mode (Force PWM or Auto PSM/PWM)
    ► I2C Programmable Output Discharge Mode (Discharge or Flatting)
  • Linear Regulators : VIN Range is 2.5V to 5.5V
    ► Max Current 0.3A
    ► I2C Programmable Output Level
  • Embedded 32Bytes MTP for Factory Tuning
    ► External MTP Pin for Write Protection
  • Sequence can be Controlled by I2C or each EN pins Defined by MASK_GPIO Pin
  • OT/UVP/VIN LV/POWRON Press Time Interrupt (IRQ)
    ► I2C Control Interface : Support Fast Mode up to 400kb/s
  • Available in AEC-Q100 Grade 3 Qualified
  • RoHS Compliant and Halogen Free
TitleLast UpdateDownload
Integrated PMIC with 4-Channel Synchronous Buck Converters, 8 LDOs, and MTP Non-Volatile Memory for Industrial and Automotive Applications2017/10/03
Technical Documents
TitleItem TypeLast UpdateDownload
Richtek Product Selection Guide [Jan., 2024] Selection Guide2024/01/18