2.0A Inductor Built-in Step-Down “micro DC/DC” Converters

The XCL211series is a synchronous step-down micro DC/DC converter which integrates an inductor and a control IC in one tiny package (3.1mm×4.7mm, h=1.3mm).

An internal coil simplifies the circuit and enables minimization of noise and other operational trouble due to the circuit wiring.

A wide operating voltage range of 2.7V to 6.0V enables support for applications that require an externally set output voltage can be selected. The XCL211 series has a fixed frequency, enabling the suppression of output ripple.

The series have a high speed soft-start as fast as 1ms in typical for quick turn-on. With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel driver transistor is forced OFF when input voltage becomes 2.4V or lower. It’s suitable for large-current application due to limit current is configured 4.0A in typical. The integrated CL discharge function which enables the electric charge at the output capacitor CL to be discharged via the internal discharge switch located between the LX and VSS pins. Due to CL discharge function, malfunction on LX is prevented when Stand-by mode.


Input Voltage Range2.7V~6.0V
Output Voltage0.9V~VIN(FB Voltage=0.8V±2%)
Output Current2.0A
High Efficiency0.94
Control MethodsPWM
Maximum Duty Cycle100%
FunctionsCurrent Limit Circuit (automatic return)
Operating Ambient Temperature-40~+85℃
Environmentally FriendlyEU RoHS compliant, Pb free

Typical Application Circuit

Quality Reports

Technical Document


Package Number of Pins Pcs/Reel Package Size(mm)
USP-11B01 11 1,000 3.1 x 4.7 x 1.35

XCL211 Series Part Numbers

Part number Sample Reference Voltage Oscillation Frequency Packages EDA Online Store
XCL211B082DR 0.8V 2.4MHz USP-11B01

Inquiries About XCL211

Please wait for a while until the form is displaying.

If the form is not displaying, please contact us from inquiry form.