XCL208 datasheet(7/22 Pages) TOREX

7 / 22 page

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XCL208/XCL209

Series

■ELECTRICAL CHARACTERISTICS (Continued)

PARAMETER

SYMBOL

CONDITIONS

MIN.

TYP.

MAX.

UNIT

CIRCUIT

FB Voltage

VFB

VIN=VCE=5.0V, VFB voltage which Decrease

VFB from 0.9V, Lx becomes “L”

(*10) level

0.784

0.800

0.816

③

Operating Voltage Range

VIN

1.8

6.0

①

Maximum Output Current

IOUTMAX

VIN=3.2V, VCE=1.0V,

When connected to external components

(*8)

400

①

UVLO Voltage

VUVLO

VCE=VIN, VFB=0.4V,

Voltage which Lx pin holding “L” level

(*1), (*10)

1.00

1.40

1.78

③

Supply Current (XCL208)

Supply Current (XCL209)

IDD

VIN=VCE= 5.0V, VFB=0.88V

②

Stand-by Current

ISTB

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

1.0

③

Oscillation Frequency

fOSC

When connected to external components,

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

2.55

3.00

3.45

MHz

①

PFM Switching Current

(*11)

IPFM

When connected to external components,

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

<E-4>

<E-5>

<E-6>

⑩

PFM Duty Limit

(*11)

DTYLIMIT_PFM

VIN=VCE=2.2V, IOUT=1mA

200

300

①

Maximum Duty Cycle

MAXDTY

VIN=VCE=5.0V, VFB=0.72V

100

③

Minimum Duty Cycle

MINDTY

VIN=VCE=5.0V, VFB=0.88V

③

Efficiency

(*2)

EFFI

When connected to external components,

VCE=VIN=2.4V, IOUT=100mA

<E-7>

①

LX SW "H" ON Resistance 1

RLxH1

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

(*3)

0.35

0.55

Ω

④

LX SW "H" ON Resistance 2

RLxH2

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

(*3)

0.42

0.67

Ω

④

LX SW "L" ON Resistance 1

RLxL1

VIN=VCE=5.0V

(*4)

0.45

0.65

Ω

LX SW "L" ON Resistance 2

RLxL2

VIN=VCE=3.6V

(*4)

0.52

0.77

Ω

LX SW "H" Leakage Current

(*5)

ILeakH

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

0.01

1.00

⑨

PFM Duty Limit

(*9)

ILIM

VIN=VCE=5.0V, VFB=0.72V

(*7)

600

800

1000

⑥

Output Voltage Temperature

Characteristics

ΔVOUT/

(VOUT･ΔTopr)

IOUT=30mA, -40℃≦Topr≦85℃,

±100

ppm/℃

①

CE "H" Voltage

VCEH

VFB=0.72V, Applied voltage to VCE,

Voltage changes LX to “L” level

(*10)

0.65

VIN

③

CE "L" Voltage

VCEL

VFB=0.72V, Applied voltage to VCE,

Voltage changes LX to “L” level

(*10)

VSS

0.25

③

CE "H" Current

ICEH

VIN=VCE=5.0V, VFB=0.72V

-0.1

0.1

⑤

CE "L" Current

ICEL

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

-0.1

0.1

⑤

Soft-start Time

tSS

When connected to external components,

VCE=0V→VIN, IOUT=1mA

0.25

0.40

①

Latch Time

tLAT

VIN=VCE=5.0V, VFB=0.64V,

Short Lx at 1Ω resistance

(*6)

⑦

Short Protection Threshold Voltage

VSHORT

VIN=VCE=5.0V, VFB voltage which Decrease

VFB from 0.9V, Lx becomes “L”

(*10) level

0.150

0.200

0.250

⑦

CL Discharge

RDCHG

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

200

300

450

Ω

⑧

Inductance Value

Test Frequency=1MHz

1.5

Allowed Inductor Current

IDC

ΔT=40℃

700

Ta=25℃

3) XCL208F083DR/XCL209F083DR

Test conditions: Unless otherwise stated, VIN=5.0V, VOUT(T)=Nominal Voltage, and the order of voltage application 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) Time until it short-circuits VOUT with GND via 1Ω of resistor from an operational state and is set to Lx=0V from current limit pulse generating.

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

(*8) 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.

(*9) Current limit denotes the level of detection at peak of coil current.

(*10) “H”=VIN~VIN-1.2V, “L”=+0.1V~-0.1V

(*11) IPFM and DTYLIMIT_PFM are defined only for the XCL209 series which have PFM control function.

XCL208 Datasheet(PDF) 7 Page - Torex Semiconductor

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