Date: 25/10/2012

Torex Semiconductor announces 16V step-down DC/DC converter

Torex Semiconductor Ltd. has developed a new 16V step-down DC/DC converter, the XC9246/XC9247 series, with an internal driver Tr.

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, allowing the use of small external components. The bootstrap method is used 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. The small peripheral components and a compact package need less mounting area and hence add to enhanced efficiency/thermal performance.

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.

Features of XC9246/XC9247 Series:
1. PFM control achieves high efficiency at light loads
2. A small coil and ceramic capacitors can be utilized
3. Can replace a 3-pin regulator
4. Internal current limiting circuit, thermal shutdown, and short-circuit protection circuit
5. Internal UVLO function (forcibly turns off driver Tr. at the detection voltage level or lower)
6. Complies with the EU RoHS Directive and is Pb-free

For more details: http://www.torex.co.jp/english/products/detail.php?id=488


Source: Torex