ADUM4070ARIZ

The ADuM4070 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.

Applications

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

Key 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