Ultra-Small (1.3 x 1.3 x h0.4mm) 400mA Synchronous Step-Down DC/DC Converters XC9244/XC9245 Series

Jul 27, 2011

XC9244/XC9245 Data Sheet [0.6MB]

The XC9244/XC9245 series is a synchronous step-down DC/DC converter with an output current of 400mA. Using the ultra-small USPN-6 package and only a coil and two capacitors as external components, these converters contribute to a reduction of mounting area and space saving.  
The operating voltage range is 2.3V to 6.0V. The output voltage range is 0.8V to 4.0V (accuracy ±2.0%) and can be selected in steps of 0.05V. The XC9244 series is PWM control providing a stable switching frequency that minimizes output ripple. The XC9245 series is PWM/PFM auto switching control providing high efficiency and low output ripple over the full load range.  
Both series incorporate a 0.25ms(TYP.)high-speed soft-start function. The CL high-speed discharge function turns on the internal switch between VOUT and VSS during standby to quickly discharge the CL load capacitor charge. The stand-by current is 1.0μA or less. Current limiting (700mA MIN.) and a UVLO function, that forces the internal driver transistor off at an input voltage of 2.25V (MAX.) or less, are incorporated as protection functions.

XC9244/XC9245 Series Features

  • Ultra-small USPN-6 package size (1.3 x 1.3 x h 0.4 mm).
  • Stable supply with high efficiency (90% TYP.) is possible.
  • With a switching frequency of 1.2MHz, 3.2 x 3.0 x h1.2mm size external coil and a 1608 size external capacitor can be selected
  • The operating voltage range is 2.3V to 6.0V. The output voltage range is 0.8V to 4.0V (±2.0% precision) in steps of 0.05V.
  • Includes a high-speed soft-start function, CL high-speed discharge function, current limiting, and a UVLO function.

See the dettails of XC9244 Series
See the dettails of XC9245 Series

Corporate Data

Founded 1995
Capital 1819.58 million JPY
Representative Tomoyuki Fujisaka
Operations 1.Research and Development, Manufacturing of ICs and active discrete components.
2.Sales of ICs and active discrete components.

Torex Semiconductor Ltd. is a leading provider of CMOS power management ICs targeted toward battery powered and energy efficient applications. Torex specializes in CMOS analog technology, with LDO voltage regulators, voltage detectors and DC/DC converters making up our core product offering.