General Description

The MAX8515A/MAX8515 shunt regulators simplify the design of voltage regulation and overvoltage protection (OVP) functions in high-accuracy isolated DC-to-DC converters with output voltages as low as 0.6V. The devices have supply voltage and feedback inputs separated from the output shunt stage, and can operate directly from the DC-to-DC converter output stage when the output voltage is 1.8V to 18V. Alternately, the MAX8515A/MAX8515 input stage can be biased from an unregulated 1.7V to 28V supply, independent of DC-to-DC converter output voltage. The MAX8515A/MAX8515 shunts 20mA when the output voltage is as low as 0.2V.  

Features

♦ MAX8515A

    0.6V ±0.5 Initial Accuracy at +25°C

    0.6V ±1 Accuracy from -40°C to +85°C

♦ MAX8515

    0.6V ±1 Initial Accuracy at +25°C

    0.6V ±1.8 Accuracy from -40°C to +85°C

♦ Sinks 20mA at 0.2V to 18V

♦ Input Voltage Range from 1.7V to 28V

♦ Directly Drives Optocouplers

♦ 0.2Ω Dynamic Output Impedance

♦ Space-Saving 5-Pin SC70 or SOT23 Packages

Applications

    Isolated DC-to-DC Converters

    Network, Telecom, and Cellular Base Station

    Power Supplies

    Low-Dropout Linear Regulators

    Shunt Regulator

    Adjustable Voltage Reference