XC9140 Series DC/DC Converter

Step-up synchronous converters from Torex that support ceramic capacitors

Image of Torex Semiconductor Ltd's XC9140 Series DC/DC ConverterThe Torex Semiconductor XC9140 series are step-up synchronous DC/DC converters that support ceramic capacitors and have an internal 0.6 Ω (typ.) Nch driver transistor and an internal 0.65 Ω (typ.) Pch synchronous rectifier 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 3.3 V and the load current is 1 mA, startup from an input voltage of VIN=0.9 V is possible. This means that the XC9140 can start from a single alkaline or nickel-metal-hydride battery. The output voltage can be set from 1.8 V to 5.0 V (±2.0%) in steps of 0.1 V.

The XC9140 features a load disconnect function to break continuity between the input and output at shutdown (XC9140A). It also includes 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 2.15 V (±3.0%) and a custom version with a UVLO release voltage, selectable from between 1.65 V to 2.2 V in steps of 0.1 V, will be available.

Features Applications
  • PFM control achieves high efficiency at light loads
  • Synchronous rectification achieves high efficiency at heavy loads
  • 50 mV fast load transient response (VOUT=3.3 V, VBAT=1.8 V, IOUT=1 mA → 50 mA)
  • Small coil and ceramic capacitors can be used
  • Load disconnect function and bypass mode function available
  • Internal in-rush current protection function available
  • Keyboards and mice
  • Bluetooth®
  • Household use medical equipment
  • Remote controls
  • Game consoles
  • Devices with 1~3 Alkaline, 1~3 Nickel Hydride, 1 Lithium, and 1 Li-ion

XC9140 Series

ImageManufacturer Part NumberDescriptionAvailable Quantity
XC9140A501MR-G datasheet linkIC REG BST 5V 295MA SYNC SOT-25XC9140A501MR-GIC REG BST 5V 295MA SYNC SOT-256616 - Immediate
XC9140A501MR-G product page link
XC9140C501MR-G datasheet linkIC REG BST 5V 295MA SYNC SOT-25XC9140C501MR-GIC REG BST 5V 295MA SYNC SOT-255443 - Immediate
XC9140C501MR-G product page link
XC9140C331MR-G datasheet linkIC REG BST 3.3V 295MA SYNC SOT25XC9140C331MR-GIC REG BST 3.3V 295MA SYNC SOT25831 - Immediate
XC9140C331MR-G product page link
XC9140A331MR-G datasheet linkIC REG BST 3.3V 295MA SYNC SOT25XC9140A331MR-GIC REG BST 3.3V 295MA SYNC SOT25902 - Immediate
XC9140A331MR-G product page link
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Published: 2013-02-20