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The XCL210 series achieves an ultralow quiescent current of 05microA and by integrating the coil an ultrasmall size Image courtesy of Torex Semiconductor
<p>The <span data-scayt-lang="en_US" data-scayt-word="XCL210">XCL210</span> series achieves an ultra-low quiescent current of 0.5&micro;A and, by integrating the coil, an ultra-small size. (Image courtesy of Torex Semiconductor).</p>

Step-Down Micro DC/DC Converters with Ultra-Low Quiescent Current

Torex Semiconductor Ltd. has developed the XCL210 series, a new product lineup of step-down "micro DC/DC" converters with integrated control IC and coil. The XCL210 series is sutiable for applications that require a low quiescent current such as wearable devices, healthcare devices, Bluetooth low-energy devices, and energy harvesting.

In recent years, wearable devices, healthcare devices, and energy harvesting (technology that captures ambient environmental energy such as heat and vibration and converts it into electricity) have been drawing attention. One keyword that is essential to devices used in these applications is "low-power consumption". The XCL210 series of step-down micro DC/DC converter ICs achieves an ultra-low quiescent current of 0.5µA, which is only 1/30th the 15µA quiescent current of previous products. In addition, by integrating the coil, which are normally used as external components to control IC, an ultra-small size has been realized (dimensions: 2.5mm x 2.0mm x h1.0mm).

Two output current types, 50mA and 200mA, are available. The operating voltage range is 2.0V to 6.0V, and the output voltage is settable in the range 1.0V to 4.0V. The internal coil simplifies the board layout, and contributes to space saving on the board and shortening of development time. Unwanted radiation noise and circuit operating trouble can also be minimized. PFM control is used for the control method.


  • Supports a wide range of applications including wearable devices, healthcare devices, Bluetooth low-energy, and energy harvesting, etc.
  • High efficiency (89%: 5.0V to 3.3V at 0.1mA)
  • Ideal for reducing printed circuit board mounting area by minimization
  • Ultra-low quiescent current of 0.5µA
  • Low noise 
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