Products - Step-Up

XC9140 PFM Synchronous Step-Up DC/DC Converter

PFM Synchronous Step-Up DC/DC Converter image


Property XC9140
Output Current 100mA
Input Voltage 0.9 ~ 5.5V
Output Voltage 1.8 ~ 5.0V
Oscillation Frequency 1.2MHz
Quiescent Current 6.3µA
Packages USP-6EL, SOT-25

Product Description

PFM Synchronous Step-Up DC/DC Converter

The XC9140 series is a new synchronous step-up DC/DC converter integrating a 0.6Ω N-ch driver transistor and a 0.65Ω synchronous P-ch switching transistor and offering high levels of efficiency and superior performance for demanding battery powered applications. 

Able to start operation from Input Voltages as low as 0.9V the XC9140 is suitable for use with single alkaline or nickel metal hydride cells and up to 100mA of output current can be supplied with VIN=1.8V and VOUT=3.3V. 

The output voltage is set internally between 1.8V~5.0V (±2%) in 0.1V increments and with a quiescent current of only 6.3µA (typ), reducing to 0.1µA (typ) during standby, the XC9140 helps to further maximise battery life in portable applications. 

The XC9140 series also features a soft-start circuit, an enable pin to turn the IC on and off, and a load disconnect function that prevents the battery charge from leaking to the output while the IC is not operating (XC9140A). An Input by-pass mode function is also available to keep the connection between the input and output side during shutdown (XC9140C).


• Input Voltage: 0.9V ~ 5.5V
• Output Voltage: 1.8V ~ 5.0V
• Output Current: 100mA (VOUT=3.3V, VBAT=1.8V)
• Low Supply Current: 6.3uA (VBAT=VOUT+0.5V)
• Switching Frequency: 1.2MHz
• Load Disconnect or Input Bypass Function Available
• Packages : SOT-25, USP-6EL

Need more Integration ?

For additional space saving take a look at the XCL101 Micro DC/DC with integrated inductor! The XCL101 is available in an ultra small CL-2025 package measuring only 2.5mm x 2.0mm x 1.0mm. Needs only two external capacitors!

XC9140 Typical Application Circuit

XC9140 Efficiency vs Output Current