GENERAL DESCRIPTION

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-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.

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 maximum

Safety and regulatory approvals (pending)

UL recognition: 5000 V rms for 1 minute per UL 1577 CSA Component Acceptance Notice #5A VDE certificate of conformity DIN V VDE V 0884-10 (VDE V 0884-10):2006-12

VIORM = 849 V peak

APPLICATIONS

Power supply start-up bias and gate drives Isolated sensor interfaces

Process controls