Reference Designs
MAXREFDES1166
Analog Devices Inc.
±7V/100mA or ±5V/50mA, Iso-Buck DC-DC Converter Using the MAX17681A
The MAX17681/MAX17681A is a high-voltage, highefficiency, iso-buck DC-DC converter designed to provide isolated power up to 5W. The device operates over a wide 4.5V to 42V input and uses primary-side feedback to regulate the output voltage.
Features
- No Optocoupler
- Synchronous Primary Operation
- All-Ceramic Capacitors, Compact Layout
- Wide 4.5V to 42V Input
- 0.9V to 0.96 x VIN Primary Output Voltage
- Delivers Up to 5W Output Power
- Peak Efficiency > 90%
- 0.9μA (typ) Shutdown Current
- Peak and Sink Current-Limit Protection
- Robust Secondary-Side Output Overcurrent Protection (MAX17681A)
- ±1.7% Feedback Accuracy
- Programmable EN/UVLO Threshold
- Adjustable Soft-Start
- Overtemperature Protection
- -40°C to +125°C Operation
