XCL225 / 26

Micro DC/DC Converter

XCL225/26 Low Power 18V, 500mA Buck with Integrated Coil

The XCL225/26 is a synchronous step-down Micro DC/DC converter with integrated coil in an ultra-small 3.0 x 3.0 x 1.6mm DFN3030-10B package.  A stable and efficient power supply circuit can be configured by simply adding only two ceramic capacitors externally thereby contributing to PCB space saving and the shortening of development time.

Integration of the coil simplifies the board layout and minimises any unwanted radiated noise.  With a P-Ch High Side Switch to ensure low Voltage operation and 100% max duty ratio, the XCL225/26 can operate from 3.0V~18.0V and deliver loads up to 500mA.

It’s designed for very high efficiencies at low output loads, with low quiescent current and automatic PFM/PWM mode or PWM only mode.  The XCL225/26 includes a built in Current Limit Fold-back circuit, adjustable soft start and a power good output.

Key Features

Output Current 500mA
N-Ch 0.64Ω (typ)
P-Ch 0.99Ω (typ)
Input Voltage Range 3.0V ~ 18V (Ab. Max 20V)
FB Voltage Range 0.75V±1.5%
Output Voltage Range 1.0V ~ 15.0V
Switching Frequency 1.2MHz
Quiescent Current 90µA 12.5µA
Control Method Fixed PWM
Max Duty Cycle 100%
Protection Circuits Current Limit Circuit
Short Circuit Protection
UV LO (2.7V)
Thermal Shutdown
Additional Features Adjustable Soft-start
Power Good Output
Optional CL Discharge
Low ESR Ceramic capacitors
Op. Amb. Temperature -40℃ ~ +105℃
Package DFN3030-10B


Typical Application Circuit


Package Style



Improved Thermal Performance with Copper CoolPost Structure

Torex has incorporated Copper CoolPosts into the DFN3030-10B package to connect the Inductor directly to the PCB footprint through the package. 

This significantly increases the thermal performance of the package and give much better heat dissipation.



Want To Find Out More?

For more information on the XCL225/26 series, please download the data sheet by clicking on the image to the right:


Fully populated evaluation boards also available from stock, please contact your local Torex representative for more details.