XC9143 Series

18V 1.0A Synchronous Step-Up DC/DC Converters

The XC9143 series is a synchronous step-up DC/DC converter that incorporates two driver transistors required for switching operation. The input voltage range can correspond to a wide range from a minimum of 1.3 V to a maximum of 16V.

Built-in low on-resistance driver transistor enable to supply with output current up to 400mA (VOUT=12V, VIN=5.0V). Regarding XC9144, since PFM operation is performed automatically in low output current region, it can support the output power with high efficiency from light load to heavy load.

Since compensation components required for stable operation are built in, it is unnecessary to select external components or perform constant design for phase compensation. Additionally, since each protection function, limit value, etc. are adjusted internally, it is possible to reduce the number of external parts required for operation. Because the on-board package is compact as USP-6C, it contributes to reducing the occupied area together with a small number of parts.

Typical Application Circuit


Input Voltage Range 1.3V ~ 16.0V
Operation Start Voltage 1.7V (TYP.)
Output Voltage Range 7.0V ~ 18.0V
FB Voltage 1.0V (±1.5%)
Oscillation Frequency 1.2MHz, 3.0MHz (±15%)
Efficiency 90% @ VOUT=7V, VIN=3.3V, IOUT=200mA
91% @ VOUT=12V, VIN=5.0V, IOUT=200mA
88% @ VOUT=12V, VIN=3.3V, IOUT=100mA
Output Current 400mA @VOUT=7V, VIN=3.3V@Ta=25℃
400mA @VOUT=12V, VIN=5.0V@Ta=25℃
200mA @VOUT=12V, VIN=3.3V@Ta=25℃
Control Mode PWM
Protection Circuits Input Current Limit
Thermal Shutdown
Functions Inrush Current Prevention
Capacitor Ceramic Capacitor
Operating Ambient Temperature -40℃ ~ 105℃
Environmentally Friendly EU RoHS Compliant, Pb Free


Package TSOT-26 Number of Pins 6
Pcs/Reel 3,000 Package Size(mm) 2.9 x 2.8 x 1.1


Technical Document