ADUM3473 Isolated Switching Regulators (1/3 Channel Directionality)

The ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474 devices are quad-channel, digital isolators with an integrated PWM controller and transformer driver for an isolated DC/DC converter. Based on the Analog Devices, Inc., iCoupler® technology, the DC/DC converter provides up to 2 W of regulated, isolated power at 3.3 V to 24 V from a 5.0 V input supply or from a 3.3 V supply. This eliminates the need for a separate, isolated DC/DC converter in 2 W isolated designs. The iCoupler chip-scale transformer technology is used to isolate the logic signals, and the integrated transformer driver with isolated secondary side control provides higher efficiency for the isolated DC/DC converter. The result is a small form factor, total isolation solution.

The ADuM347x isolators provide four independent isolation channels in a variety of channel configurations and data rates.

Applications
  • RS-232/RS-422/RS-485 transceivers
  • Industrial field bus isolation
  • Power supply startup bias and gate drives
  • Isolated sensor interfaces
  • Process controls
Features and Benefits
  • Isolated PWM Controller
  • Integrated transformer driver
  • Regulated adjustable output: 3.3 V to 24 V
  • 2 W output power
  • 70% efficiency at guaranteed load of 400 mA at 5.0 V output
  • Quad dc-to-25 Mbps (NRZ) signal isolation channels
  • 20-lead SSOP package
  • High temperature operation: 105°C
  • High common-mode transient immunity: >25 kV/μs
  • 200 kHz to 1 MHz adjustable oscillator frequency
  • Soft start function at power-up
  • Pulse-by-pulse overcurrent protection
  • Thermal shutdown
  • 2500 V rms isolation
  • Evaluation Board available
  • Automotive Qualified
Interface & Isolation
Data Sheets
Documentnote
ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474: PWM Controller and Transformer Driver with Quad-Channel Isolators Data Sheet (Rev. B)PDF 741 kB
User Guides
Documentnote
UG-197: iCoupler ADuM347x Quad-Channel Isolators with Integrated Transformer DriverPDF 653 kB
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
ADUM3473ARSZ Production20 ld SSOPOTH 66-40 to 105C3.322.88Y
ADUM3473ARSZ-RL7 Production20 ld SSOPREEL 500-40 to 105C02.88Y
ADUM3473CRSZ Production20 ld SSOPOTH 66-40 to 105C4.533.93Y
ADUM3473CRSZ-RL7 Production20 ld SSOPREEL 500-40 to 105C03.93Y
ADUM3473WARSZ Production20 ld SSOPOTH 66-40 to 105C3.93.45Y
ADUM3473WARSZ-RL7 Production20 ld SSOPREEL 500-40 to 105C03.45Y
ADUM3473WCRSZ Production20 ld SSOPOTH 66-40 to 105C5.344.73Y
ADUM3473WCRSZ-RL7 Production20 ld SSOPREEL 500-40 to 105C04.73Y
Evaluation Boards
Part NumberDescriptionPriceRoHS
EVAL-ADUM3471EBZEvaluation Board60Y
Reference Materials
ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474:集成PWM控制器和变压器驱动器的四通道隔离器 数据手册 (Rev. 0) adum3470
ADuM3470/ADuM3471/ADuM3472/ADuM3473/ADuM3474: PWM Controller and Transformer Driver with Quad-Channel Isolators Data Sheet (Rev. B) adum3470
UG-197: iCoupler ADuM347x Quad-Channel Isolators with Integrated Transformer Driver adum3470
数字隔离器产品选型与资源指南 adum1233
Inside iCoupler® Technology:ADuM347x PWM Controller and Transformer Driver with ad7400
NAppkin Note: Lowering the Power of the ADuM524x ad7400
Inside iCoupler® Technology: ADuM347x PWM Controller and Transformer Driver... adum3470