ADUM4473 Isolated Switch Regulator with Quad-Channel Isolators (1/3 Channel Directionality)

Power supply startup bias and gate drives Isolated sensor interfaces Process controls RS-232/RS-422/RS-485 transceivers

The ADuM4470/ADuM4471/ADuM4472/ADuM4473/ADuM4474 are quad-channel, digital isolations with a regulated DC/DC isolated power supply controller with an internal MOSFET driver. The DC/DC controller has an internal isolated PWM feedback from the secondary side based on the iCoupler® chip scale transformer technology and complete loop compensation. This eliminates the need to use an optocoupler for feedback and compensates the loop for stability.

The ADuM447x isolator provides a more stable output voltage and higher efficiency compared to unregulated isolated DC/DC jpower supplies. The fully integrated feedback and loop compensation in a wide-body SOIC package provide a smaller form factor and 8.3 mm creepage distance solution. The regulated feedback provides a relatively flat efficiency curve over the full output power range. The ADuM3070 enables a DC/DC converter with a 3.3 V to 24 V isolated output voltage range from either a 5.0 V or a 3.3 V input voltage, with an output power of up to 2.5 W.

The ADuM447x isolators provide four independent isolation channels in a variety of channel configurations and data rates. (The x in ADuM447x throughout this data sheet stands for the ADuM4470/ADuM4471/ADuM4472/ADuM4473/ADuM4474)

Applications

Features and Benefits
  • For 2500 V rms isolation, please visit the ADuM3473 product page
  • Isolated PWM feedback with built in compensation
  • Primary side transformer driver for up to 2.5 W output power with 5 V input voltage
  •  Regulated adjustable output: 
    3.3 V to 24 V 
  • Up to 80% efficiency
  • Quad dc-to-25 Mbps (NRZ) signal isolation channels
  • 200 kHz to 1 MHz adjustable oscillator
  • Soft start function at power-up
  • Pulse-by-pulse overcurrent protection
  • Thermal shutdown
  • 5000 V rms isolation
  • High common-mode transient immunity: >25 kV/µs
  • 20-lead SOIC package with 8.3 mm creepage
  • High temperature operation:  105°C
Interface & Isolation
Data Sheets
Documentnote
ADuM4470/ADuM4471/ADuM4472/ADuM4473/ADuM4474: Isolated Switching Regulator with Quad-Channel Isolators Data Sheet (Rev. 0)PDF 743 kB
User Guides
Documentnote
UG-492: Evaluating the iCoupler ADuM4470, ADuM4471, ADuM4472, ADuM4473, and ADuM4474 Isolated Switching Regulators with Integrated FeedbackPDF 367 kB
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
ADUM4473ARIZ Production20 ld SOIC (increased Creepage) OTH 31-40 to 105C5.134.45Y
ADUM4473ARIZ-RL Production20 ld SOIC (increased Creepage) REEL 1000-40 to 105C04.45Y
ADUM4473CRIZ Production20 ld SOIC (increased Creepage) OTH 31-40 to 105C6.415.57Y
ADUM4473CRIZ-RL Production20 ld SOIC (increased Creepage) REEL 1000-40 to 105C05.57Y
Evaluation Boards
Part NumberDescriptionPriceRoHS
EVAL-ADUM4471EBZEvaluation Board60Y
ADuM4470/ADuM4471/ADuM4472/ADuM4473/ADuM4474: 集成四通道隔离器的隔离式开关稳压器 (Rev. 0) adum4470
ADuM4470/ADuM4471/ADuM4472/ADuM4473/ADuM4474: Isolated Switching Regulator with Quad-Channel Isolators Data Sheet (Rev. 0) adum4470
UG-492: Evaluating the iCoupler ADuM4470, ADuM4471, ADuM4472, ADuM4473, and ADuM4474 Isolated Switching Regulators with Integrat adum4470
UG-492:评估集成反馈的iCoupler ADuM4470、ADuM4471、ADuM4472、ADuM4473和ADuM4474隔离式开关调节器 adum4470