Torex Semiconductor Ltd. has launched the XCL223/XCL224 series of "micro DC/DC" converters that are the world's smallest class of 0.4A/0.7A type converters (*1). The XCL223/XCL224 series are ultra-small (outer dimensions: 2.25mm x 1.5mm x h0.75mm) step-down micro DC/DC converters with an integrated coil and control IC. A power circuit can be created by simply adding two ceramic capacitors, contributing to conservation of board space and shortening of development time. In addition, an internal coil simplifies the board layout and makes it possible to minimize unwanted radiation noise and circuit operation trouble.

The operating voltage range is 2.7V to 5.5V, and 0.8 to 3.6V can be selected for the output voltage in steps of 0.05V (accuracy ±2.0%). The switching frequency is 3.0MHz, and either PWM control (XCL223) or PWM/PFM auto switching control (XCL224) can be selected for the control method.

The XCL223/XCL224 series uses HiSAT-COT(*2), and is ideal for optical cables that are required to have a fast transient response, small PC peripheral devices, and portable or digital devices that incorporate a CPU. Features:

  • Step-down DC/DC converters with integrated coil are the smallest in the world in the 0.4A / 0.7A output current class(*1)
  • HiSAT-COT(*2) is used for a fast transient response.
  • Can be used for applications such as optical devices, portable devices, and digital devices.
  • High efficiency (90%: 4.2V
  • 3.3V, at 300mA)

Ideal for reducing PCB mounting space by miniaturization (*1) Among 0.4A / 0.7A output type DC/DC converters with integrated coil and IC.

Based on a survey conducted by Torex (as of Jan. 6, 2016). (*2) HiSAT-COT is an original Torex term for High Speed Transient Response.