Wide-Input 0.6V Shunt Regulators for Isolated DC-DC Converters

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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-to-DC 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 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.

The MAX8515/MAX8515A are available in space-saving 5-pin SC70 and SOT23 packages and are specified over the -40°C to +85°C extended temperature range. An evaluation kit is available to speed designs.
MAX8515A, MAX8515: Typical Operating Circuit MAX8515A, MAX8515: Typical Operating Circuit Enlarge+

Key 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


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

See parametric specs for Isolated Power Supplies (25)

Part NumberVIN
Oper. Temp.
minmaxmaxSee Notes
MAX8515 1.728
Single-Ended Forward
Two-Switch Forward
0.5-40 to +85
$0.70 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX8515EVKIT: Evaluation Kit for the MAX8515, MAX8515A
Product Reliability Reports: MAX8515A.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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