ADUM4070

PRODUCTION

Isolated Switch Regulator with Integrated Feedback

Analog Devices ADUM4070 Product Info

10 February 2026 5

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 70% efficiency
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

16-lead SOIC package with 8.3 mm creepage
High temperature operation:
105°C
Safety and regulatory approvals
UL recognition: 5000 V rms for 1 minute per UL 1577
CSA certification per IEC 62368-1, IEC 61010-1, and IEC 60601-1
VDE certificate of conformity
DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
V_IORM = 849 V peak

Part details & applications

The ADuM40701 is a regulated dc-to-dc isolated power supply controller with an internal MOSFET driver. The dc-to-dc controller has internal isolated PWM feedback from the secondary side based on the iCoupler^® chip scale transformer technology and complete loop compensation. This architecture eliminates the need to use an optocoupler for feedback and compensates the loop for stability.

The ADuM4070 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 wide-body SOIC package provide a solution with a smaller form factor and 8.3 mm creepage distance.

The regulated feedback provides a relatively flat efficiency curve over the full output power range. The ADuM4070 enables a dc-todc 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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