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XCL205/XCL206/XCL207Series

Inductor Built-in Step-Down “micro DC/DC” Converters

0

20

40

60

80

100

0.1

1

10

100

1000

Output Current:IOUT (mA)

VIN= 5.5V

5.0V

4.2V

VOUT=3.3V

(PWM)

XCL206/XCL207(PWM/PFM)

XCL205/XCL207

■TYPICAL PERFORMANCE

CHARACTERISTICS

☆Green Operation Compatible

■APPLICATIONS

●Mobile phones, Smart phones

●Bluetooth Headsets

●WiMAX PDAs, MIDs, UMPCs

●Portable game consoles

●Digital cameras, Camcorders

●Electronic dictionaries

■TYPICAL APPLICATION CIRCUIT

ETR2801-015

■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.

VIN

Vss

CE/MODE

LX

Vss

VOUT

CL

10μF

4.7μF

CIN

L1

L2

600mA

(TOP VIEW)

* “L1 and LX”, and “L2 and VOUT” is connected by wiring.

■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

Capacitor

CE Function

Protection Circuits

: 100%

: Low ESR Ceramic

: Active High

Soft-Start Circuit Built-In

CL High Speed Auto Discharge

:Current Limiter Circuit Built-In

(Constant Current & Latching)

Control Methods

: PWM (XCL205)

PWM/PFM Auto (XCL206)

PWM/PFM Manual (XCL207)

Operating Ambient Temperature

Environmentally Friendly

: -40℃ ~ +85℃

: EU RoHS Compliant, Pb Free

XCL205A333xx/XCL206A333xx/XCL207A333xx

XCL205/206/207 Series A/B/C/G Types