XCL210 Series ETR28009-005a 50mA/200mA Inductor Built-in Step-Down micro DC/DC Converters Green Operation Compatible GENERAL DESCRIPTION The XCL210 series is a synchronous step-down micro DC/DC converter which integrates an inductor and a control IC in one tiny package (2.0mm2.5mm, 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 current consumption to as low as 0.1A 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. FEATURES APPLICATIONS Input Voltage : 2.0V ~ 6.0V Wearable Devices Output Voltage : 1.0V ~ 4.0V (2.0%) Smart meters Control Methods : PFM control Output Current : 200mA (Type A/C) Bluetooth units 50mA (Type B/D) Energy Harvest devices Supply Current : 0.5A Backup power supply circuits High Efficiency : 93% (V =3.6V,V =3.0V/100A) IN OUT Portable game consoles Function : UVLO Devices with 1 Lithium cell Short Circuit Protection CL Discharge(Type C/D) Capacitor : Low ESR Ceramic Capacitor Operating Ambient Temperature : -40 ~ 85 Packages : CL-2025-02 Environmentally Friendly : EU RoHS Compliant, Pb Free TYPICAL APPLICATION CIRCUIT TYPICAL PERFORMANCE CHARACTERISTICS XCL210B301GR-G (VOUT=3.0V) 100 7 V IN 80 1 Lx 6 V IN CIN GND NC 5 2 60 10 F CL 50mA 22 F 3 CE V 4 OUT 40 8 20 VIN=3.6V VIN=4.2V 0 0.01 0.1 1 10 100 Output Current : I mA OUT 1/25 Efficiency : EFFI % XCL210 Series BLOCK DIAGRAM XCL210 Series, Type A/B L1 L2 Inductor Short V OUT Protection VDD PFM R1 CFB Comparator Current Sense R2 Vref Synch PFM Buffer Lx Controller Drive CE Controller Logic CE VDD UVLO VIN Start Up V IN Controller GND * XCL210A and B type do not have CL Discharge function. * Diodes inside the circuits are ESD protection diodes and parasitic diodes. XCL210 Series, Type C/D L2 L1 Inductor Short V OUT Protection V DD PFM R1 CFB Comparator Current CL Sense Discharge R2 Vref Synch PFM Buffer Lx Controller Drive CE Controller Logic CE V DD UVLO VIN Start Up V IN Controller GND * Diodes inside the circuits are ESD protection diodes and parasitic diodes. 2/25