XCL206 Datasheet PDF ( Pinout ) - Inductor Built-in Step-Down micro DC/DC Converters

XCL206 Datasheet PDF - Torex Semiconductor

Part Number	*XCL206*
Description	Inductor Built-in Step-Down micro DC/DC Converters
Manufacturers	Torex Semiconductor
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XCL205/XCL206/XCL207Series

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ETR2801-005b

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

☆GreenOperation 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 (2.5mm×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. 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 0.42ΩP-channel driver transistor and 0.52ΩN-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/XCL206B/XCL207B series provide short-time turn-on by the soft start function internally set in 0.25 ms

(TYP). XCL205B(C) /XCL206 B(C) / XCL207B(C) 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

Output Voltage

: 0.8V ~ 4.0V (+2.0%)

High Efficiency (VOUT=1.8V)

Output Current

: 85% (TYP.)

: 600mA

Oscillation Frequency

: 3.0MHz (+15%)

Maximum Duty Cycle

: 100%

Control Methods

: PWM (XCL205)

PWM/PFM Auto (XCL206)

PWM/PFM Manual (XCL207)

High Speed Soft-Start Circuit Built-In

Current Limiter Circuit Built-In (Constant Current & Latching)

Low ESR Ceramic Capacitor Compatible

CL High Speed Auto Discharge

* Performance depends on external components and wiring on the PCB.

■TYPICAL APPLICATION CIRCUIT ■TYPICAL PERFORMANCE

CHARACTERISTICS

XCL205/206/207 Series

10μF

600mA

LX VIN

Vss Vss

VOUT CE/MODE

CIN

4.7μF

(TOP VIEW)

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

XCL205A333xx/XCL206A333xx/XCL207A333xx

100

XCL206/XCL207(PWM/PFM)

VIN= 5.5V

5.0V

40 4.2V

XCL205/XCL207

(PWM)

VOUT=3.3V

0.1

10 100 1000

Output Current:IOUT (mA)

1/26

■ELECTRICAL CHARACTERISTICS (Continued)

●XCL205A183AR/XCL206A183AR/XCL207A183AR, VOUT=1.8V, fOSC=3.0MHz, Ta=25℃

XCL205/XCL206/XCL207

Series

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PARAMETER

SYMBOL

Output Voltage

Operating Voltage Range

Maximum Output Current

VOUT

VIN

IOUTMAX

UVLO Voltage

Supply Current (XCL205)

Supply Current (XCL206, XCL207)

Stand-by Current

Oscillation Frequency

VUVLO

IDD

ISTB

fOSC

PFM Switching Current (*12)

IPFM

PFM Duty Limit (*12)

Maximum Duty Cycle

Minimum Duty Cycle

DTYLIMIT_PFM

DMAX

DMIN

Efficiency

EFFI

Lx SW "H" ON Resistance 1

Lx SW "H" ON Resistance 2

Lx SW "L" ON Resistance 1

Lx SW "L" ON Resistance 2

Lx SW "H" Leak Current (*5)

Lx SW "L" Leak Current (*5)

Current Limit (*10)

Output Voltage

Temperature Characteristics

RLｘH

RLｘL

ILeakH

ILeakL

ILIM

△VOUT/

(VOUT・△topr)

CE "H" Voltage

VCEH

CE "L" Voltage

VCEL

CONDITIONS

When connected to external components,

VIN=VCE=5.0V, IOUT=30mA

VIN=VOUT(E)+2.0V, VCE=1.0V

When connected to external components (*9)

VCE=VIN,VOUT=0V,

Voltage which Lx pin holding “L” level (*1, *11)

VIN=VCE=5.0V, VOUT=VOUT(T)×1.1V

VIN=5.0V, VCE=0V, VOUT=VOUT(T)×1.1V

When connected to external components,

VIN=VOUT(T)+2.0V,VCE=1.0V, IOUT=100mA

When connected to external components,

VIN=VOUT(T)+2.0V, VCE=VIN , IOUT=1mA (*12)

VCE= VIN=(C-1) IOUT=1mA (*12)

VIN=VCE=5.0V, VOUT=VOUT (T)×0.9V

VIN=VCE=5.0V, VOUT=VOUT (T)×1.1V

When connected to external components,

VCE=VIN＝VOUT (T)+1.2V, IOUT = 100mA

VIN=VCE=5.0V, VOUT=0V, ILX=100mA (*3)

VIN=VCE=3.6V, VOUT=0V, ILX=100mA (*3)

VIN=VCE=5.0V (*4)

VIN=VCE=3.6V, (*4)

VIN=VOUT=5.0V, VCE=0V, LX=0V

VIN=VOUT=5.0V, VCE=0V, LX= 5.0V

VIN=VCE=5.0V, VOUT=VOUT (E)×0.9V (*8)

IOUT =30mA

-40℃≦Topr≦85℃

VOUT=0V, Applied voltage to VCE,

Voltage changes Lx to “H” level (*11)

VOUT=0V, Applied voltage to VCE,

Voltage changes Lx to “L” level (*11)

MIN. TYP. MAX. UNITS CIRCUIT

1.764

2.0

600

1.800 1.836

- 6.0

①

1.00

2550

1.40

3000

1.78

1.0

3450

μA

kHz

③

②

①

170 220 270 mA

⑩

- 200 300

100 -

- -0

①

③

- 85 - % ①

0.35 0.55

0.42 0.67

0.45 0.66

0.52 0.77

- 0.01 1.0 μA

900 1050 1350 mA

④

⑤

⑥

- ±100 - ppm/ ℃ ①

0.65 -

VIN V

③

VSS - 0.25 V ③

PWM "H" Level Voltage (*13)

VPWMH

When connected to external components,

IOUT=1mA (*6), Voltage which oscillation

frequency becomes 2550kHz≦fOSC≦3450kHz (*13)

- VIN - 1.0 V

①

PWM "L" Level Voltage (*13)

CE "H" Current

CE "L" Current

Soft Start Time

Latch Time

Short Protection

Threshold Voltage

Inductance Value

Allowed Inductor Current

VPWML

ICEH

ICEL

tSS

tLAT

VSHORT

IDC

When connected to external components,

IOUT=1mA (*6), Voltage which oscillation

frequency becomes fOSC＜2550kHz (*13)

VIN=VCE=5.0V, VOUT=0V

VIN=5.0V, VCE=0V, VOUT=0V

When connected to external components,

VCE=0V→VIN , IOUT=1mA

VIN=VCE=5.0V, VOUT=0.8×VOUT(T)

Short Lx at 1Ω resistance (*7)

Sweeping VOUT, VIN=VCE=5.0V, Short Lx at

1Ω resistance, VOUT voltage which Lx becomes “L”

level within 1ms

Test frequency =1MHz

ΔT=40℃

VIN -

0.25

- 0.1

0.5

1.0

0.675

0.9

0.900

1.5

1000

0.1

2.5

1.125

μA

μH

①

⑤

①

⑦

Test conditions: Unless otherwise stated, VIN=5.0V, VOUT (T)=Nominal Voltage

NOTE:

*1: Including hysteresis operating voltage range.

*2: EFFI = { ( output voltage×output current ) / ( input voltage×input current) }×100

*3: ON resistance (Ω)= (VIN - Lx pin measurement voltage) / 100mA

*4: Design value

*5: When temperature is high, a current of approximately 10μA (maximum) may leak.

*6:The CE/MODE pin of the XCL207 series works also as an external switching pin of PWM control and PWM/PFM control. When the IC is in the

operation, control is switched to the automatic PWM/PFM switching mode when the CE/MODE pin voltage is equal to or greater than VIN minus

0.3V, and to the PWM mode when the CE/MODE pin voltage is equal to or lower than VIN minus 1.0V and equal to or greater than VCEH.

*7:Time until it short-circuits VOUT with GND via 1Ωof resistor from an operational state and is set to Lx=0V from current limit pulse generating.

*8: When VIN is less than 2.4V, limit current may not be reached because voltage falls caused by ON resistance.

*9: When the difference between the input and the output is small, some cycles may be skipped completely before current maximizes.

If current is further pulled from this state, output voltage will decrease because of P-ch driver ON resistance.

*10: Current limit denotes the level of detection at peak of coil current.

*11: “H”=VIN~VIN-1.2V, “L”=+0.1V~-0.1V

*12: IPFM and DTYLIMIT_PFM are defined only for the XCL206 and XCL207 series which have PFM control function. (Not for the XCL 205 series)

*13: VPWMH and VPWML are defined only for the XCL207 series. (They are not used in the XCL205/and XCL206 series)

5/26

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XCL206 Datasheet PDF - Torex Semiconductor

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