HiSAT-COT®Control Extremely Small 600mA Step-Down DC/DC Converters, Developed 4MHz Product of XC9281/XC9282 Series

Jul 22, 2019

Torex Semiconductor Ltd. (Tokyo Japan: President, Koji Shibamiya, 6616: 1st section at Tokyo Stock Exchange) have developed 4 MHz product of XC9281 / XC9282 series which released in November 2018.

The XC9281 / XC9282 series are 600 mA synchronous rectification DC/DC converters adopting HiSAT-COT (*) control. By adding an oscillation frequency of 4 MHz, high efficiency can be realized while maintaining the mounting area as compared with the oscillation frequency of 6 MHz of the conventional XC9281 / XC9282 series. (Figure 1)

Figure1 4 MHz and 6 MHz Efficiency Graph of XC9281/XC9282 Series

With an oscillation frequency of 4 MHz, 1uH coil with a size of 1.0 x 0.5mm can be used. A 0.6 x 0.3mm ceramic capacitor can be used for the input capacitance (CIN) and the output capacitance (CL), realizing that the mounting area including peripheral components can be reduced to 3.52 mm2. (Figure 2)

Figure2 Mount Area of XC9281/XC9282 Series

Because of these features, XC9281 / XC9282 series are ideal for equipment requiring miniaturization and low profile mounting area, and battery-powered equipment such as mobile.

Moreover, the high-speed transient response technology of the HiSAT-COT control makes it possible to minimize the fluctuation of the output voltage for a load transient condition. This feature is optimal for applications requiring a fast response and output voltage stability for an instantaneous load fluctuation like FPGA.
(*)HiSAT-COT is a proprietary high-speed transient response technology which Torex developed and the DC / DC converters with HiSAT-COT technology are ideal for LSI's that require high precision and high stability power supply voltage.