XCL205/XCL206/XCL207 Series ETR2801-015 Inductor Built-in Step-Down micro DC/DC Converters Green Operation Compatible GENERAL DESCRIPTION The XCL205/XCL206/XCL207 series is a synchronous step-down micro DC/DC converter which integrates an inductor and a control IC in one tiny package (2.5mm2.0mm, H=1.0mm). A stable power supply with an output current of 600mA is configured using only two capacitors connected externally. Operating voltage range is from 2.0V to 6.0V(XCL20xG:1.8V~6.0V). Output voltage is internally set in a range from 0.8V to 4.0V in increments of 0.05V. The device is operated by 3.0MHz, and includes 0.42 P-channel driver transistor and 0.52 N- channel switching transistor. As for operation mode, the XCL205 series is PWM control, the XCL206 series is automatic PWM/PFM switching control and the XCL207 series can be manually switched between the PWM control mode and the automatic PWM/PFM switching control mode, allowing fast response, low ripple and high efficiency over the full range of loads (from light load to heavy load). During stand-by, the device is shutdown to reduce current consumption to as low as 1.0A or less. With the built-in UVLO (Under Voltage Lock Out) function, the internal driver transistor is forced OFF when input voltage becomes 1.4V or lower. XCL205B (G, F)/XCL206B (G, F)/XCL207B (G, F) series provide short-time turn-on by the soft start function internally set in 0.25ms (TYP). XCL205B(C,G,F) /XCL206 B(C,G,F) / XCL207B(C,G,F) integrate C auto discharge function which enables the L electric charge stored at the output capacitor C to be discharged via the internal auto-discharge switch located between the L L and V pins. When the devices enter stand-by mode, output voltage quickly returns to the V level as a result of this X SS SS function. FEATURES APPLICATIONS Ultra-Small : 2.5mm2.0mm, H=1.0mm Mobile phones, Smart phones Input Voltage : 2.0V ~ 6.0V(A/B/C Type) 1.8V ~ 6.0V(G/F Type) Bluetooth Headsets Output Voltage : 0.8V ~ 4.0V (+2.0%) WiMAX PDAs, MIDs, UMPCs High Efficiency : 90% (VIN=4.2V, VOUT=3.3V) Output Current : 600mA Portable game consoles Oscillation Frequency : 3.0MHz (+15%) Maximum Duty Cycle : 100% Digital cameras, Camcorders Capacitor : Low ESR Ceramic CE Function : Active High Electronic dictionaries Soft-Start Circuit Built-In CL High Speed Auto Discharge Protection Circuits :Current Limiter Circuit Built-In (Constant Current & Latching) Control Methods : PWM (XCL205) PWM/PFM Auto (XCL206) PWM/PFM Manual (XCL207) Operating Ambient Temperature : -40 ~ +85 Environmentally Friendly : EU RoHS Compliant, Pb Free TYPICAL APPLICATION CIRCUIT TYPICAL PERFORMANCE CHARACTERISTICS XCL205/206/207 Series A/B/C/G Types XCL205A333xx/XCL206A333xx/XCL207A333xx 100 L1 XCL206/XCL207(PWM/PFM) 80 LX V IN CIN CL 4.7F Vss Vss 60 10F VIN= 5.5V 600mA 5.0V V CE/MODE OUT 40 4.2V XCL205/XCL207 (PWM) L2 20 VOUT=3.3V (TOP VIEW) 0 0.1 1 10 100 1000 * L1 and LX, and L2 and VOUT is connected by wiring. Output Current:IOUT (mA) 1/27 Efficency:EFFI(%) XCL205/XCL206/XCL207 Series BLOCK DIAGRAM 1) XCL205 / XCL206 / XCL207 series A Type L2 L1 Inductor Phase Current Feedback Current Limit VOUT Compensation R1 CFB PWM Error Comparator Amp. Synch FB Buffer Logic Lx Drive R2 VSHORT Vref with PWM/PFM Soft Start, Selector CE VIN VSS Ramp Wave UVLO Cmp Generator OSC R3 UVLO CE/MODE R4 Control VSS CE/MODE Logic 2) XCL205 / XCL206 / XCL207 series B/C/G Type L2 L1 Inductor Phase Current Feedback Current Limit VOUT Compensation R1 CFB PWM Error Comparator Amp. Synch FB Buffer Logic Lx Drive R2 VSHORT Vref with PWM/PFM Soft Start, Selector CE VIN VSS UVLO Cmp Ramp Wave Generator CE/ OSC R3 UVLO CE/MODE R4 Control VSS CE/MODE Logic 3) XCL205 / XCL206 / XCL207 series F Type L2 L1 Inductor Phase Current Feedback Current Limit FB Compensation PWM Error Comparator FB Amp. Synch Logic Buffer Lx Drive VSHORT Vref with PWM/PFM Soft Start, Selector CE VIN VSS UVLO Cmp Ramp Wave Generator CE/ OSC R3 UVLO CE/MODE R4 Control VSS CE/MODE Logic NOTE: The XCL205 offers a fixed PWM control, a signal from CE/MODE Control Logic to PWM/PFM Selector is fixed to level inside. The XCL206 control scheme is PWM/PFM automatic switching, a signal from CE/MODE Control Logic to PWM/PFM Selector is fixed to level inside. The diodes placed inside are ESD protection diodes and parasitic diodes. 2/27