DC/DC converter series cuts package area by 70 per cent
From Torex Semiconductor comes the XC9280 series of 18V input, 3A peak output current step-down synchronous DC/DC converters.
Products in the XC9280 series support 18V input and 3A peak output current and have a switching frequency of 1.2MHz allowing them to be used with small coils (2.2-microH inductance). The series has a compact TSOT-26 package (2.8 x 2.9 x h1.1mm) with mounting feet which the company says gives a 70 per cent smaller package area per unit than previous equivalent products and a higher switching frequency gives it a 25 per cent smaller mounting.
The XC9280 has an operating voltage range of 4.5V to 18V and can support output voltages from 1.8V to 7.0V. With a quiescent current of 80-microA, the control system uses PFM/PWM automatic switching control. Even with the compact package, the XC9280 can maintain on-resistance values of 0.166-Ohm (high side) and 0.13-Ohm (low side), a level equivalent to previous products, says the company.
The IC is also equipped with a built-in external adjustment soft-start function effective for preventing output capacity inrush and output voltage startup delays.
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