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New 1A Switching Regulator K78-1000R3

MORNSUN extends its portfolio of non-isolated switching regulator DC/DC Converter with a new series: K78-1000R3.

As K78-500R3 (500mA output) has enjoyed great popularity from the market, K78-1000R3 (1A output) series is designed to meet wider output power range requirement of customers’ application.

Same as K78-500R3, K78-1000R3 series are in SIP package with high-efficiency up to 96%, which do not need heat sink. The product has pin-outs compatible with LM78XX regulator in a much smaller size, which saves your space. And its operating temperature ranges from -40℃ to 85℃.

The series operate with a wide input voltage range of 6V to 36V and deliver precise output voltages. With standby input current as low as 0.1mA, low ripple, and noise and short-circuit protection, they are suitable for various applications such as industrial control, power grid, instrumentation and mining, etc.

In addition to encapsulated package, open-frame version is also an available option to save your design cost with more competitive price.


  • High efficiency up to 96%
  • No-load input current as low as 0.1mA
  • Operating temperature: -40℃ ~ 85℃
  • Negative output available
  • Short-circuit protection
  • Pin-out compatible with LM78XX regulator
  • Meet UL60950/EN60950 standard

China has the world's largest high-speed rail network as long as 20,000km so far, which not only comprehensively enhances the quality of China's road network...
This application note demonstrates the different requirements that are in use for battery-powered railway applications and introduces MORNSUN’s rugged railway DC/DC converters and application notes.
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