ADUM3070

PRODUCTION

Isolated Switch Regulator With Integrated Feedback

Analog Devices ADUM3070 Product Info

10 February 2026 7

Features

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
200 kHz to 1 MHz adjustable oscillator
Soft start function at power-up
Pulse-by-pulse overcurrent protection
Thermal shutdown

2500 V rms isolation
High common-mode transient immunity: >25 kV/μs
16-lead QSOP package
Safety and regulatory approvals
- UL 1577
  - V_ISO = 2500 V rms for 1 minute
- IEC / EN / CSA 62368-1
- IEC / CSA 61010-1
- DIN EN IEC 60747-17 (VDE 0884-17)
  - V_IORM = 565 V peak
High temperature operation: 105°C

Part details & applications

The ADuM3070 isolator is a regulated dc-to-dc isolated power supply controller with an internal MOSFET driver. The dc-to-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 ADuM3070 isolator provides a more stable output voltage and higher efficiency compared to unregulated isolated dc-to-dc power supplies. The fully integrated feedback and loop compensation in a small QSOP package provides a smaller form factor than any discrete solution. The regulated feedback provides a relatively flat efficiency curve over the full output power range. The ADuM3070 enables a dc-to-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.

Applications

Power supply startup bias and gate drives
Isolated sensor interfaces
Process controls

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