Shunt Regulators Tooled For Low Voltage DC/DC Converters

The MAX8515A and MAX8515 debut as the industry's smallest sub-1V shunt references for optical networks and modules. They’re also claimed to simplify voltage feedback and over-voltage protection functions in sub-1V isolated dc/dc converters. The MAX8515 has an input voltage range from 1.7V to 28V and can operate from an unregulated supply. It regulates the output voltage with ±1% initial accuracy and ±1.8% accuracy over a temperature range of from -40°C to 85°C. The MAX8515A regulates the output voltage with ±0.5% initial accuracy and ±1% accuracy over a -40°C to 85°C temperature range. The supply voltage and feedback of both devices are independent of the shunt-regulator stage, allowing them to sink currents at very low output voltages. They can also be used as adjustable-output shunt references or combined with a low-cost NPN BJT to design a low-dropout linear regulator. Available in 2 mm x 2 mm, five-pin SC70 packages, the MAX8515 shunt regulators has a starting price of $0.48 each/1,000. For more information, contact MAXIM INTEGRATED PRODUCTS, Sunnyvale, CA. (800) 998-8800.