TOREX SEMICONDUCTOR LTD. (Tokyo Japan: President, Tomoyuki Fujisaka) has developed a dual output step-up/inverting DC/DC converter XC9519 series.
The XC9519 series is 2-ch step-up/inverting DC/DC converter. Using external components, the step-up DC/DC converter can be set to any desired voltage up to 18V, and the inverting DC/DC converter can be set to any desired voltage down to -15V. The switching frequency is a high 1.2MHz, enabling the use of small external components.
The input voltage range is 2.7V to 5.5V. The output current is 500mA (VIN=3.7V, VOUTP=5.0V, VOUTN=-5.0V). PWM control and automatic PWM/PFM switching control can be selected for the operation modes. The switching frequency of PWM control is fixed, thereby reducing noise. Automatic PWM/PFM switching control switches from PWM control to PFM control when the load is light to achieve high efficiency across the entire load range, from light loads to high output currents.
The step-up DC/DC converter has a built-in soft start time of 2.5ms (TYP.), while the inverting DC/DC converter's soft start time is 2.2ms (TYP.). The supply current is 1.0μA or less in standby. A gate control circuit for an external P-ch MOS FET for load cut-off is incorporated. By adding an external P-ch MOS FET, the load can easily be cut-off in standby. Protective circuits include driver Tr current limiting (2A MIN.) and thermal shutdown. A UVLO function that forces the driver Tr. off at an input voltage of 2.2V or less is also incorporated. The IC is housed in a small QFN-24 (4.0 x 4.0 x h0.8 mm) package.
【XC9519 Series Features】
● 2-ch type consisting of step-up and inverting DC/DC converters.
● The switching frequency is a high 1.2MHz, enabling the use of small external components.
● The input voltage range is 2.7V to 5.5V. The output current is 500mA (VIN=3.7V, VOUTP=5.0V, VOUTN=-5.0V).
● A gate control circuit for an external P-ch MOS FET for load cut-off is incorporated, enabling easy cut off of the load in standby.
● Soft start, current limiting, thermal shutdown, and UVLO functions are included.
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.
http://www.torex.co.jp/english/
For further information, please contact:
Singapore: TOREX SEMICONDUCTOR (S) PTE LTD Tel: +65-6745-1352 E-mail: tsp@torex.com.sg
USA: TOREX USA Corp. Tel: +1-949-261-2022 E-mail: info@torex-usa.com
Europe: TOREX SEMICONDUCTOR EUROPE LIMITED Tel: +44-1530-510190 E-mail: sales@torexsemi.co.uk
