XC9147 Series

Load Disconnection Function, 1.2A Step-up DC/DC Converters

XC9147 series are synchronous step-up DC/DC converters with a 0.2Ω(TYP.) N-channel driver transistor and a 0.2Ω(TYP.) synchronous P-channel switching transistor built-in. A highly efficient and stable current can be supplied up to 1.2A by reducing ON resistance of the built-in transistors.

The series are able to start operation under the condition which has 0.9V input voltage to generate 3.3V output voltage with a 22Ω(TBD) load resistor, suitable for mobile equipment using only one Alkaline battery or one Nickel metal hydride battery.

The output voltage can be set from 1.8V to 5.5V (±2.0%) in steps of 0.1V.With the built-in oscillator, either 1.2MHz or 3.0MHz can be selected for suiting to your particular application.

In standby mode, the CL discharge function lowers the output voltage at high speed to prevent malfunction of output equipment. The G/J type can stop the operation of the IC and reduce the leakage of alkaline batteries when the battery voltage drops by UVLO function.

The release voltage of UVLO is 1.6V (±3.0% accuracy).

Typical Application Circuit


Input Voltage Range 0.65V~6.0V
Fixed Output Voltage 1.8V~5.5V (0.1V increments, A Type)
2.2V~5.5V (0.1V increments, Other than A Type)
Oscillation Frequency 1.2MHz (±15%)
3.0MHz (±20%)
Input Current 1.2A
Output Current 650mA @VOUT=5.0V, VBAT=3.3V (TYP.)
500mA @VOUT=3.3V, VBAT=1.8V (TYP.)
Control Mode Selection PWM
Load Transient Response 100mV@VOUT=3.3V,VBAT=1.8V
Protection Circuits Thermal Shutdown
Current Limit,
Integral Latch (D/J Type)
Short Circuit Protection (D/J Type)
UVLO (G/J Type)
Functions Soft Start
Load Disconnection
Output Capacitor Ceramic Capacitor
Operating Ambient Temperature -40℃ ~ 105℃
Environmentally Friendly EU RoHS Compliant, Pb Free



Technical Document