16V Step-down DC/DC Converter with Internal Driver Tr. XC9246 / XC9247 Series

Oct 11, 2012

XC9246/XC9247 Data Sheet [1.8MB]

XC9246/XC9247 Leaflet [0.3MB]

TOREX SEMICONDUCTOR LTD. (Tokyo Japan: President, Tomoyuki Fujisaka) has developed a new 16V Step-down DC/DC converter with an internal driver Tr., the XC9246/XC9247 series.

The XC9246/XC9247 series are 16V step-down DC/DC converters with an internal driver Tr. The output voltage can be set within the range 1.2V to 5.6V using the 1.0V (±1.5%) internal reference voltage and external resistors. The soft-start time is set internally to 1.5ms (TYP.) and this can be adjusted externally using a resistor and capacitor connected to the EN/SS pin.  
The switching frequency is a high 1.2MHz, enabling the use of small external components. The bootstrap method is employed and the Hi side driver is N-ch to reduce chip area, making it possible to house the IC in a SOT-26W or small USP-6C package. Small peripheral components and a compact package also mean less mounting area is needed, contributing to improved efficiency/thermal performance. It can replace a 3-pin regulator.  
PWM control (XC9246) or PWM/PFM auto switching control (XC9247) can be selected for the operation mode. The XC9246 series is PWM control, and the XC9247 series is PWM/PFM, which automatically switches from PWM to PFM during light loads and provides high efficiency, high load response, low voltage ripple, can be achieved over a wide range of load conditions.  
Internal protective circuits include a current limiting circuit, thermal shutdown, and short-circuit protection circuit. An internal UVLO function that forcibly turns the driver Tr. off at the detection voltage level or lower is also provided. This series is an environment-friendly product that complies with the EU RoHS Directive and is Pb-free.

XC9246/XC9247 Series Features

  • PFM control achieves high efficiency at light loads
  • A small coil and ceramic capacitors can be used
  • Can replace a 3-pin regulator
  • Internal current limiting circuit, thermal shutdown, and short-circuit protection circuit
  • Internal UVLO function (forcibly turns off driver Tr. at the detection voltage level or lower)

See the detailas of XC9246 Series
See the details of XC9247 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.