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XC9281/XC9282 Series

■ELECTRICAL CHARACTERISTICS

Unless otherwise stated, VIN=5V, VCE=5V, VOUT(T)=Nominal Value,

NOTE:

(*1) For PWM control.

(*2) When the difference between the input and the output is small, 100% duty might come up and internal control circuits keep

Pch driver turning on even though the output current is not so large.

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

(*3) Including UVLO detect voltage, hysteresis operating voltage range for UVLO release voltage.

(*4) Design value for WLP-5-06

(*5) RLXH= (VIN - Lx pin measurement voltage) / 100mA, RLXL= Lx pin measurement voltage / 100mA

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

(*7) "H" = VIN - 1.2V ~ VIN , "L" = -0.1V ~ 0.1V

PARAMETER

SYMBOL

CONDITIONS

MIN.

TYP.

MAX.

UNITS

CIRCUIT

Output Voltage

VOUT

VIN = <C -1>, VOUT = VOUT(T)×1.2→VOUT(T)×0.8

VOUT Voltage when Lx pin voltage changes from

"L" level to "H" level (*1)(*7)

<E-1>

<E-2>

<E-3>

V

①

Operating

Voltage Range

VIN

2.5

-

5.5

V

②

Maximum Output

Current

IOUTMAX

When connected to external components (*2),

VIN = <C -1>

600

-

-

mA

②

UVLO Voltage(*3)

VUVLO

VOUT = 0V, VIN = VCE

VIN Voltage which Lx pin holding “L” level

(*7)

1.66

2.00

2.40

V

①

Quiescent

Current

(XC9281)

Iq

VOUT =4.0V

-

590

948

μA

③

Quiescent

Current

(XC9282)

Iq

VOUT =4.0V

-

11.0

17.6

μA

③

Stand-by Current

ISTB

VIN = 5.5V, VCE = 0V, VOUT = 0V, VLx = 0V

-

0.0

0.6

μA

④

ON time

tON

When connected to external components,

VIN=<C-1>, IOUT=1mA

<E-5>

<E-6>

<E-7>

ns

②

Lx SW”H”ON

Resistance(*4)

RLXH

VIN = 3.6V, VOUT = 0V, ILX = 100mA

(*5)

-

0.32

0.50

Ω

⑤

Lx SW”L”ON

Resistance(*4)

RLXL

VIN = 3.6V, VOUT = 3.9V, ILX = 100mA

(*5)

-

0.26

0.35

Ω

⑤

Lx SW”H”

Leakage Current

ILeakH

VIN=5.5V, VCE=0V, VOUT=0V, VLX=5.5V

-

0.0

10.0

μA

④

Lx SW”L”

Leakage Current

ILeakL

VIN=5.5V, VCE=0V, VOUT=0V, VLX=0V

-

0.0

0.3

μA

④

Current Limit (*6)

ILIMH

VIN = 3.6V, VOUT=0V ILx until Lx pin oscillates

750

1000

1500

mA

⑥

Output Voltage

Temperature

Characteristics

ΔV

OUT/

(VOUT・ΔTopr)

VIN = <C -1>, VOUT = VOUT(T)×1.2→VOUT(T)×0.8

VOUT Voltage when Lx pin voltage changes from

"L" level to "H" level (*1)(*7), -40℃≦Topr≦105℃

-

±100

-

ppm/℃

①

CE ”H” Voltage

VCEH

VIN = 5.5V, VOUT = 0V, VCE Voltage which Lx pin

holding “H” level (*7)

1.20

-

5.50

V

①

CE ”L” Voltage

VCEL

VIN = 5.5V, VOUT = 0V, VCE Voltage which Lx pin

holding “L” level (*7)

GND

-

0.30

V

①

CE ”H” Current

ICEH

VCE = 5.5V, VOUT = 4.0V

-0.1

0.0

0.1

μA

③

CE ”L” Current

ICEL

VIN = 5.5V, VCE = 0V, VOUT = 0V

-0.1

0.0

0.1

μA

④

Soft-Start Time

tSS

VIN = 3.6V, VCE = 0V→3.6V, VOUT = VOUT(T) × 0.9

After "H" is fed to CE, the time by when clocks

are generated at Lx pin.

54

110

201

μs

①

CL Discharge

Resistance

(B Type)

RDCHG

VCE = 0V, VOUT = 1.0V

100

145

200

Ω

⑦

Ta=25℃

XC9281 / XC9282 Series