■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 (2.5mm×2.0mm, 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 0.42Ω P-channel driver transistor and 0.52Ω 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 1.0μA 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 CL auto discharge function which enables the electric charge stored at the output capacitor CL to be discharged via the internal auto-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.

■APPLICATIONS

●Mobile phones, Smart phones

●Bluetooth Headsets

●WiMAX PDAs, MIDs, UMPCs

●Portable game consoles

●Digital cameras, Camcorders

●Electronic dictionaries

■FEATURES

Ultra-Small: 2.5mm×2.0mm, H=1.0mm

Input Voltage: 2.0V ~ 6.0V(A/B/C Type) 1.8V ~ 6.0V(G/F Type)

Output Voltage: 0.8V ~ 4.0V (+2.0%)

High Efficiency: 90% (VIN=4.2V, VOUT=3.3V)

Output Current: 600mA

Oscillation Frequency: 3.0MHz (+15%)

Maximum Duty Cycle: 100%

Capacitor: Low ESR Ceramic

CE Function: Active High 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