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XCL205/XCL206/XCL207

Series

■ELECTRICAL CHARACTERISTICS (Continued)

●XCL205F083AR/XCL206F083AR/XCL207F083AR/XCL205F083CR/XCL206F083CR/XCL207F083CR,

PARAMETER

SYMBOL

CONDITIONS

MIN.

TYP.

MAX.

UNITS CIRCUIT

FB Voltage

VFB

VIN=VCE=5.0V, VFB voltage which Decrease

VFB from 0.9V, Lx becomes “H”

(*11) level

0.784

0.800

0.816

V

③

Operating Voltage Range

VIN

1.8

-

6.0

V

⑪

Maximum Output Current

IOUTMAX

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

When connected to external components (*9)

600

-

-

mA

⑪

UVLO Voltage

VUVLO

VCE=VIN,VFB= 0.4V,

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

1.00

1.40

1.78

V

③

Supply Current (XCL205)

IDD

VIN =VCE=5.0V, VFB= 0.88V

-

46

65

μA

②

Supply Current (XCL206, XCL207)

-

21

35

Stand-by Current

ISTB

VIN =5.0V, VCE=0V, VFB= 0.88V

-

0

1.0

μA

②

Oscillation Frequency

fOSC

When connected to external components,

VIN =3.2V, VCE=1.0V, IOUT=100mA

2550

3000

3450

kHz

⑪

PFM Switching Current (*12)

IPFM

When connected to external components,

VIN =3.2V, VCE = VIN , IOUT=1mA

170

220

270

mA

⑫

PFM Duty Limit (*12)

DTYLIMIT_PFM

VCE= VIN = 2.2V, IOUT=1mA

-

200

300

%

⑪

Maximum Duty Cycle

MAXDTY

VIN = VCE =5.0V, VFB = 0.72V

100

-

-

%

③

Minimum Duty Cycle

MINDTY

VIN = VCE =5.0V, VFB = 0.88V

-

-

0

%

③

Efficiency(*2)

EFFI

When connected to external components,

VCE = VIN = 2.4V, IOUT = 100mA

-

86

-

%

⑪

Lx SW "H" ON Resistance 1

RLｘH

VIN = VCE = 5.0V, VFB = 0.72V,ILX = 100mA

(*3)

-

0.35

0.55

Ω

④

Lx SW "H" ON Resistance 2

RLｘH

VIN = VCE = 3.6V, VFB = 0.72V,ILX = 100mA

(*3)

-

0.42

0.67

Ω

④

Lx SW "L" ON Resistance 1

RLｘL

VIN = VCE = 5.0V

(*4)

-

0.45

0.65

Ω

-

Lx SW "L" ON Resistance 2

RLｘL

VIN = VCE = 3.6V

(*4)

-

0.52

0.77

Ω

-

Lx SW "H" Leakage Current (*5)

ILEAKH

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

-

0.01

1.0

μA

⑨

Current Limit (*10)

ILIM

VIN = VCE= 5.0V, VFB = 0.72V

(*8)

900

1050

1350

mA

⑥

Output Voltage

Temperature Characteristics

△VOUT/

(VOUT・△Topr)

IOUT =30mA

-40℃≦Topr≦85℃

-

±100

-

ppm/ ℃

⑪

CE "H" Voltage

VCEH

VFB=0.72V, Applied voltage to VCE,

Voltage changes Lx to “H” level (*11)

0.65

-

6.0

V

③

CE "L" Voltage

VCEL

VFB=0.72V, Applied voltage to VCE,

Voltage changes Lx to “L” level (*11)

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

⑪

PWM "H" Level Voltage (*13)

VPWML

When connected to external components,

IOUT=1mA

(*6), Voltage which oscillation

frequency becomes fOSC＜2550kHz

(*13)

VIN -

0.25

-

-

V

⑪

CE "H" Current

ICEH

VIN = VCE =5.0V, VFB = 0.72V

- 0.1

-

0.1

μA

⑤

CE "L" Current

ICEL

VIN =5.0V, VCE = 0V, VFB = 0.72V

- 0.1

-

0.1

μA

⑤

Soft Start Time

tSS

When connected to external components,

VCE=0V→VIN , IOUT=1mA

-

0.25

0.40

ms

⑪

Latch Time

tLAT

VIN=VCE=5.0V, VFB=0.64

Short Lx at 1Ω resistance (*7)

1.0

-

20

ms

⑦

Short Protection

Threshold Voltage

VSHORT

VIN=VCE=5.0V, VFB voltage which Decrease

VFB from 0.4V, Lx becomes “L”

(*11)level within 1ms

0.15

0.20

0.25

V

⑦

CL Discharge

RDCHG

VIN = 5.0V

LX = 5.0V VCE = 0V, VFB = open

200

300

450

Ω

⑧

Inductance Value

L

Test frequency=1MHz

-

1.5

-

μH

-

Allowed Inductor Current

IDC

ΔT=40℃

-

1000

-

mA

-

Test conditions: VOUT=1.2V when the external components are connected. Unless otherwise stated, VIN=5.0V, applied voltage sequence is VFB

→VIN→VCE

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 VFB 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)

Ta=25℃