XCL221/XCL222 Series ETR28008-002a HiSAT-COT Control 0.5A Inductor Built-in Step-Down micro DC/DC Converters Green Operation Compatible GENERAL DESCRIPTION The XCL221/XCL222 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 2.5V to 5.5V enables support for applications that require an internally fixed output voltage (0.8V to 3.6V). The XCL221/XCL222 series uses synchronous rectification at an operating frequency of 1.2MHz. (*) The XCL221/XCL222 series uses HiSAT-COT synchronous rectification. HiSAT-COT+PWM control (XCL221) or HiSAT- COT+automatic PWM/PFM switching control (XCL222) can be selected. The series have a high speed soft-start as fast as 0.3ms in typical for quick turn-on. With the built-in UVLOfunction, the internal P-channel driver transistor is forced OFF when input voltage becomes 2.0V or lower. When CE=Low, 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 PGND pins. The power consumption will be less than 1.0A. (*) HiSAT-COT is a proprietary high-speed transient response technology for DC/DC converter which was developed by Torex. It is Ideal for the LSI s that require high precision and high stability power supply voltage. APPLICATIONS FEATURES Wearable Device Input Voltage : 2.5V ~ 5.5V Bluetooth Module Output Voltage : 0.8V ~ 3.6V (2.0%) Oscillation Frequency : 1.2MHz SSD(Solid State Drive) Output Current : 500mA Mobile phone Efficiency : 93% (V =5.0V, V =3.3V/200mA) IN OUT Digital still camera Control Methods : HiSAT-COT Portable game devices 100% Duty Cycle PWM (XCL221) PWM/PFM (XCL222) Circuit Protection : Thermal Shut Down Current Limit Circuit (Drop) Short Circuit Protection (Latch) Functions : Soft-start Circuit Built-in UVLO C Discharge L Output Capacitor : Low ESR Ceramic Capacitor Operating Ambient Temperature : -40 ~ 105 Package : CL-2025-02 Environmental Friendly : EU RoHS Compliant, Pb Free TYPICAL PERFORMANCE TYPICAL APPLICATION CIRCUIT CHARACTERISTICS XCL222B181ER-G (V =1.8V) OUT 7 1 Lx 6 V IN C IN 4.7F AGND PGND 5 2 CL 0.5A 10 F 3 V CE 4 OUT 8 1/19 XCL221/XCL222 Series BLOCK DIAGRAM L2 L1 Inductor Short VOUT Protection R1 CFB High Side Current Limit VIN Phase Compensation R2 Error Comparator Amp. AGND S Synch Q Logic Buffer Lx Drive R Vref with Soft Start CE Control Logic, Minimum UVLO On Time VIN PGND CE Thermal Shutdown Generator VOUT PWM/PFM Selector * The XCL221 offers a fixed PWM control, a Control Logic of PWM/PFM Selector is fixed at PWM internally. The XCL222 control scheme is a fixed PWM/PFM automatic switching, a Control Logic of PWM/PFM Selector is fixed at PWM/PFM automatic switching internally. Diodes inside the circuit are an ESD protection diode and a parasitic diode. PRODUCT CLASSIFICATION Ordering Information XCL221 - PWM XCL222 - PWM/PFM Automatic switching control DESIGNATOR ITEM SYMBOL DESCRIPTION Type B Refer to Selection Guide Output Voltage options e.g.)1.2V =1, =2 1.25V =1, =C Output Voltage 08 ~ 36 0.05V Increments: 0.05=A,0.15=B,0.25=C,0.35=D,0.45=E,0.55=F,0.65=H, 0.75=K,0.85=L,0.95=M Oscillation Frequency 1 1.2MHz (*1) - Package (Order Unit) ER-G CL-2025-02 (3,000pcs/Reel) (*1) The -G suffix denotes Halogen and Antimony free as well as being fully EU RoHS compliant. Selection Guide LATCH or OUTPUT C AUTO- CHIP CURRENT SOFT- THERMAL L TYPE SHORT UVLO VOLTAGE DISCHARGE ENABLE LIMIT START SHUTDOWN PROTECTION B Fixed Yes Yes Yes Yes Yes Fixed Yes 2/19