XCL212B082DR

XCL211/XCL212 Series ETR28006-002 2.0A Inductor Built-in Step-Down micro DC/DC Converters GreenOperation Compatible GENERAL DESCRIPTION The XCL211/XCL212series is a synchronous step-down micro DC/DC converter which integrates an inductor and a control IC in one tiny package (3.1mm4.7mm, 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/XCL212 series uses synchronous rectification at an operating frequency of 2.4MHz. PWM control (XCL211) or automatic PWM/PFM switching control (XCL212) can be selected. The XCL211 series has a fixed frequency, enabling the suppression of output ripple. The XCL212 series achieves high efficiency while holding down output ripple across the full range of loads, from light to heavy, enabling the extension of battery operation time. 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. Its suitable for large-current application due to limit current is configured 4.0A in typical. The integrated C discharge function which enables the L electric charge at the output capacitor CL to be discharged via the internal discharge switch located between the LX and GND pins. Due to C discharge function, malfunction on LX is prevented when Stand-by mode. L APPLICATIONS FEATURES Note PCs Package Size : 3.1mm4.7mm, h=1.3mm Printers Input Voltage : 2.7V6.0V Tablet PCs Output Voltage : 0.9VVIN (FB Voltage=0.8V2%) PND(Portable Navigation Device) High Efficiency : 94% (VIN=5.0V, VOUT=3.3V) Output Current : 2.0A Oscillation Frequency : 2.4MHz (15%) Maximum Duty Cycle : 100% Control Methods : PWM (XCL211) PWM/PFM (XCL212) Functions : Current Limit Circuit (automatic return) Soft-Start Circuit Built-In CL Discharge, UVLO Output Capacitor : Low ESR Ceramic Capacitor Operating Ambient Temperature : -40+85 Package : USP-11B01 Environmental Friendly : EU RoHS Compliant, Pb Free TYPICAL PERFORMANCE TYPICAL APPLICATION CIRCUIT CHARACTERISTICS XCL211B082DR /XCL212B082DR 100 XCL212 80 Lx L1 CE VIN XCL211 PVIN VOUT 60 L2 R1 AVIN CFB 40 CIN1 FB CIN2 GND V =5.0V IN CL R2 V =3.3V OUT 20 0 0.1 1 10 100 1000 10000 Output Current : I (mA) OUT 1/17 Efficiency : EFFI (%) XCL211/XCL212 series BLOCK DIAGRAM XCL211/XCL212 Series (USP-11B01) Inductor L2 L1 UVLO Cmp AVIN UVLO R1 PVIN Current Feedback Current Limit R2 Error PWM Amp. Comparator Synch FB Logic Buffer Lx Drive Vref with Phase Ramp Wave Soft Start, Generator Compensation CE OSC CE/B CE Thermal Control PWM/PFM CE Shutdoun Logic Selector GND * The XCL211 offers a fixed PWM control, a Control Logic of PWM/PFM Selector is fixed at PWM internally. The XCL212 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 XCL211 Fixed PWM XCL212 PWM/PFM Auto Switching DESIGNATOR ITEM SYMBOL DESCRIPTION Type B Refer to Selection Guide Reference Voltage 08 Reference Voltage is fixed at 0.8V Oscillation Frequency 2 2.4MHz (*1) (*2) Package (Order Unit) DR USP-11B01 (1,000pcs/Reel) (*1) Halogen free and EU RoHS compliant. (*2) The USP-11B01 reels are shipped in a moisture-proof packing. Selection Guide SOFT-START CHIP CURRENT THERMAL C AUTO- L TYPE UVLO TIME ENABLE LIMITER SHUTDOWN DISCHARGE B Fixed Yes Yes Yes Yes Yes 2/17