ADUM3070

PRODUCTION

Isolated Switch Regulator With Integrated Feedback

Data Sheet (Rev. B) Product Selection Table

Part Models: 2
1ku List Price: Starting From $1.66

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Overview

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

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

Part Models: 2
1ku List Price: Starting From $1.66

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
ADUM3070ARQZ	16-Lead QSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADUM3070ARQZ-RL7	16-Lead QSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 7, 2025 - 25_0066 Update Data Sheet Regulatory Information for Select Isolator Products with DC-to-DC Converters
		PCN25_0066_Form Material_Report Datasheet Specification Comparison
ADUM3070ARQZ	PRODUCTION
ADUM3070ARQZ-RL7	PRODUCTION
Aug 28, 2017 - 17_0107 Addition of ASE Chungli as an Alternate Assembly Site for Select Isolator Products in 16L and 20L QSOP
		PCN17_0107_Form Material_Report Detailed Change Description Qualification Results Summary
ADUM3070ARQZ	PRODUCTION
ADUM3070ARQZ-RL7	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Evaluation Kits

EVAL-ADUM3070: ADuM3070 Evaluation BoardADuM3070 Evaluation Board

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Product Details

The EVAL-ADuM3070EBZ demonstrates two separate applications for the ADuM3070 isolated switch regulator with integrated feedback. It has two independent power supply circuits: a double supply and a single supply. The switching frequency can be set from 200 kHz to 1000 kHz. The board supports a variety of I/O configurations and multiple transformer options. It is equipped with two ADuM3070 isolators.

Resources

UG-402: iCoupler ADuM3070 Isolated Switch Regulator With Integrated Feedback Evaluation Board
5/31/2012

Reference Designs

Isolated USB to FTDI Isolated RS-232/Isolated RS-485 Circuit

Isolated USB to Isolated RS-485/Isolated RS-232 Interface

View Detailed Reference Design

Features and Benefits

Isolated USB to Isolated RS-485/RS-232 Interface
Small Footprint
Robust Interface

Part Used

Design & Integration Tools

CN-0373 Design and Integration Files
1.37 M

Galvanic Isolation of USB High Speed Type-C Connector

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Features and Benefits

USB 2 High Speed Isolated Retimer
Type-C Connectivity
Small Form Factor
High Efficiency 2.5W Isolated Power
Automatic Power Path Selectors with Integrated Protections for Optional External Power