MAXIM MAX8515EXK+T

The MAX8515A/MAX8515 adjustable shunt regulators feature isolated supply inputs and outputs, ideal for isolated power-supply applications using an optocoupler in the feedback path. The MAX8515A/MAX8515 sink 20mA with VOUT at 0.2V. The wide input supply range allows the device to operate from 1.7V to 28V. The MAX8515A/ MAX8515 compare the FB input to a precision 600mV reference. If the FB input is low, OUT sinks no current. If FB rises above 600mV, OUT sinks up to 20mA.

• 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
• Supply voltage and feedback inputs separated from the output shunt stage
• Can operate directly from the DC-to-DC converter output stage when the output voltage is 1.8V to 18V
• Input stage can be biased from an unregulated 1.7V to 28V supply, independent of DC-to-DC converter output voltage
• Shunts 20mA when the output voltage is as low as 0.2V
• 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-to-DC converters
• 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 DC-to-DC converters
• High open-loop bandwidth allows design of high-bandwidth DC-to-DC converters
• Low-cost, low-dropout linear regulators can be designed with the MAX8515A/MAX8515 and an external NPN transistor for cost-conscious applications that do not require overcurrent, short-circuit, or overtemperature protection
• Available in space-saving 5-pin SC70 and SOT23 packages
• Specified over the -40°C to +85°C extended temperature range
• An evaluation kit is available to speed designs
• Sinks 20mA at 0.2V to 18V
• Input Voltage Range from 1.7V to 28V
• Directly Drives Optocouplers
• 0.2Ω Dynamic Output Impedance

• Isolated DC-to-DC Converters
• Network, Telecom, and Cellular Base Station
• Power Supplies
• Low-Dropout Linear Regulators
• Shunt Regulator
• Adjustable Voltage Reference