Step-up Synchronous PFM DC/DC Converter XC9140 Series

Aug 1, 2012

XC9140 Data Sheet [1.7MB]

XC9140 Leaflet [0.3MB]

TOREX SEMICONDUCTOR LTD. (Tokyo Japan: President, Tomoyuki Fujisaka) has developed a new Step-up Synchronous DC/DC Converter with PFM Control.

The XC9140 series are step-up synchronous DC/DC converters that support ceramic capacitors and have an internal 0.6Ω (TYP.) N-ch driver transistor and an internal 0.65Ω (TYP.) P-ch synchronous switch transistor. PFM control enables a low quiescent current, making these products ideal for portable devices that require high efficiency.  
When the output voltage is 3.3V and the load current is 1mA, startup from an input voltage of VIN=0.9V is possible which means that the XC9140 can be used in applications that start from a single alkaline or nickel-metal hydride battery. The output voltage can be set from 1.8V to 5.0V (±2.0%) in steps of 0.1V.  
The XC9140 features a load disconnect function to break continuity between the input and output at shutdown (XC9140A), and also a bypass mode function to maintain continuity between the input and output (XC9140C).  
A version with a UVLO (Under Voltage Lock-Out) function will also be available (currently under development) which enables the prevention of battery leakage by stopping the IC's operation when the input voltage is low. The standard product will have a UVLO release voltage of 2.15V (±3.0%) and a custom version with a UVLO release voltage selectable from between 1.65V to 2.2V, in steps of 0.1V, will also be made available. These environmentally friendly products comply with the EU RoHS Directive and are Pb free.

XC9140 Series Features

  • PFM control achieves high efficiency at light loads
  • Synchronous rectification achieves high efficiency at heavy loads
  • 50mV fast load transient response (VOUT=3.3V, VBAT=1.8V, IOUT=1mA → 50mA)
  • Small coil and ceramic capacitors can be used
  • Load disconnect function and bypass mode function available
  • Internal inrush current protection function available

See the details of XC9140 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.