MAX8515A

19-2528; Rev 1; 2/03 KIT ATION EVALU E L B A AVAIL w w w . D a t a S h e e Wide-Input 0.6V Shunt Regulators for Isolated DC-to-DC Converters General Description Features o MAX8515A 0.6V ±0.5% Initial Accuracy at +25°C 0.6V ±1% Accuracy from -40°C to +85°C o MAX8515 0.6V ±1% Initial Accuracy at +25°C 0.6V ±1.8% Accuracy from -40°C to +85°C o Sinks 20mA at 0.2V to 18V o Input Voltage Range from 1.7V to 28V o Directly Drives Optocouplers o 0.2Ω Dynamic Output Impedance o Space-Saving 5-Pin SC70 or SOT23 Packages MAX8515A/MAX8515 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. The MAX8515A features an initial output accuracy of 0.5% at +25°C and 1% from -40°C to +85°C and provides the output voltage regulation function for isolated DC-toDC converters. The MAX8515 features initial output accuracy of 1% at +25°C and 1.8% from -40°C to +85°C and can provide an output OVP function for isolated DCto...