DC/DC converters in ultra-small package

January 28, 2016 // By Susan Nordyk
Aimed at portable devices, tablets, and optical devices, DC/DC converters in the XCL223/XCL224 series from Torex pack an integrated coil and control IC in their 2.25×1.5×0.75-mm package.

These micro-sized step-down converters are among the smallest in their class with 0.4-A and 0.7-A output current. A power circuit can be created by simply adding two ceramic capacitors. The converters’ internal coil simplifies board layout and makes it possible to minimise unwanted radiated noise.

The XCL223/XCL224 devices operate from an input voltage of 2.7V to 5.5V. Output voltage is selectable from 0.8V to 3.6V in steps of 0.05V, accurate to within ±2.0%. Switching frequency is 3.0 MHz with either PWM control (XCL223) or PWM/PFM auto-switching control (XCL224). Torex’s HiSAT-COT enables greater suppression of frequency fluctuations caused by the load and input voltage, resulting in fast transient response times.

Torex Semiconductor, www.torexsemi.com