XCL210 Series

50mA/200mA Inductor Built-in Step-Down “micro DC/DC” Converters

The XCL210 series is a synchronous step-down micro DC/DC converter which integrates an inductor and a control IC in one tiny package (2.0mm×2.5mm, h=1.0mm). 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 2.0V to 6.0V enables support for applications that require an internally fixed output voltage from 1.0V to 4.0V in increments of 0.05V.

During stand-by, all circuits are shutdown to reduce currentconsumption to as low as 0.1μA or less.

With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel MOS driver transistor is forced OFF when input voltage becomes UVLO detect Voltage or lower.

The XCL210 integrate 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. When the devices enter stand-by mode, output voltage quickly returns to the VSS level as a result of this function.

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Jul 1, 2015
Product News
Step-down "micro DC/DC" converters with ultra-low 0.5μA quiescent current and integrated coil

Typical Application Circuit


Input Voltage Range 2.0V~6.0V
Output Voltage Range 1.0V~4.0V(±2.0%)
Control Methods PFM
Output Current 200mA(Type A/C)
50mA(Type B/D)
Quiescent Current 0.5μA
Efficiency 93%(VIN=3.6V,VOUT=3.0V/100μA)
Functions UVLO
Short Circuit Protection
CL Discharge(Type C/D)
Capacitor Low ESR Ceramic
Operating Ambient Temperature -40℃~+85℃
Environmentally Friendly EU RoHS compliant, Pb free



Technical Document

Quality Reports


QuestionHow does the CL discharge function work?

The function rapidly releases the charge remained in the CL capacitor to make the VOUT pin voltage zero. The VOUT pin voltage does not reach zero immediately after being turned off by the CE function due to the charge remained in the connected CL capacitor. While the charge in the CL capacitor is gradually reaching zero, the LSI continues operating and does not work with the CE pin signal, which may cause a malfunction. This is why the discharge is required when turning off the CE pin. A larger capacitance of the capacitor needs longer time to be discharged.

QuestionWhat does CL mean?

Load capacitor. Other companies often refer to it as COUT.