XCL208/XCL209
Series
■ELECTRICAL
CHARACTERISTICS
1) XCL208Axx3DR/XCL209Axx3DR
PARAMETER
Output Voltage
Operating Voltage Range
Maximum Output Current
UVLO Voltage
Supply Current (XCL208)
Supply Current (XCL209)
Stand-by Current
Oscillation Frequency
PFM Switching Current
PFM Duty Limit
(*11)
(*11)
Ta=25℃
CONDITIONS
When connected to external components,
V
IN
=V
CE
=5.0V, I
OUT
=30mA
V
IN
=V
OUT(T)
+2.0V, V
CE
=1.0V,
(*8)
When connected to external components
V
CE
=V
IN
, V
OUT
=0V, Voltage which Lx pin holding
(*1),(*10)
“L” level
V
IN
=V
CE
=5.0V, V
OUT
=V
OUT(T)
×1.1
V
IN
=5.0V, V
CE
=0V, V
OUT
=V
OUT(T)
×1.1
When connected to external components,
V
IN
=V
OUT(T)
+2.0V, V
CE
=1.0V, I
OUT
=100mA
When connected to external components,
V
IN
=V
OUT(T)
+2.0V, V
CE
=V
IN
, I
OUT
=1mA
V
CE
=V
IN
=<C-1>, I
OUT
=1mA
V
IN
=V
CE
=5.0V, V
OUT
=V
OUT(T)
×0.9
V
IN
=V
CE
=5.0V, V
OUT
=V
OUT(T)
×1.1
When connected to external components,
V
CE
=V
IN
=V
OUT(T)
+1.2V, I
OUT
=100mA
V
IN
=V
CE
=5.0V, V
OUT
=0V, I
LX
=100mA
V
IN
=V
CE
=3.6V, V
OUT
=0V, I
LX
=100mA
V
IN
=V
CE
=5.0V
V
IN
=V
CE
=3.6V
(*4)
(*4)
(*3)
(*3)
SYMBOL
V
OUT
V
IN
I
OUTMAX
V
UVLO
I
DD
I
STB
f
OSC
I
PFM
DTY
LIMIT_PFM
D
MAX
D
MIN
EFFI
R
LxH1
R
LxH2
R
LxL1
R
LxL2
I
LeakH
I
LeakL
I
LIM
ΔV
OUT
/
(V
OUT
½ΔTopr)
V
CEH
V
CEL
I
CEH
I
CEL
t
SS
t
LAT
MIN.
<E-1>
2.0
400
1.00
-
-
-
2.55
<E-4>
-
100
-
-
-
-
-
-
-
-
600
-
0.65
V
SS
-0.1
-0.1
0.5
1
TYP.
<E-2>
-
-
1.40
46
21
0
3.00
<E-5>
200
-
-
<E-7>
0.35
0.42
0.45
0.52
0.01
0.01
800
±100
-
-
-
-
0.90
-
MAX.
<E-3>
6.0
-
1.78
65
35
1
3.45
<E-6>
300
-
0
-
0.55
0.67
0.65
0.77
1.00
1.00
1000
-
V
IN
0.25
0.1
0.1
2.50
20
UNIT
V
V
mA
V
μA
μA
MHz
mA
%
%
%
%
Ω
Ω
Ω
Ω
μA
μA
mA
ppm/℃
V
V
μA
μA
ms
ms
CIRCUIT
①
①
①
③
②
②
①
⑩
①
③
③
①
④
④
-
-
⑤
⑤
⑥
①
③
③
⑤
⑤
①
⑦
Maximum Duty Cycle
Minimum Duty Cycle
Efficiency
(*2)
L
X
SW "H" ON Resistance 1
L
X
SW "H" ON Resistance 2
L
X
SW "L" ON Resistance 1
L
X
SW "L" ON Resistance 2
L
X
SW "H" Leakage Current
L
X
SW "L" Leakage Current
Current Limit
(*9)
(*5)
V
IN
=V
OUT
=5.0V, V
CE
=0V, V
LX
=0V
V
IN
=V
OUT
=5.0V, V
CE
= 0V, V
LX
=5.0V
V
IN
=V
CE
=5.0V, V
OUT
=V
OUT(T)
×0.9V
I
OUT
=30mA,
-40℃≦Topr≦85℃
V
OUT
=0V, Applied voltage to V
CE
,
Voltage changes Lx to “L” level
(*10)
(*7)
(*5)
Output Voltage Temperature
Characteristics
CE "H" Voltage
CE "L" Voltage
CE "H" Current
CE "L" Current
Soft-start Time
Latch Time
V
OUT
=0V, Applied voltage to V
CE,
(*10)
Voltage changes Lx to “L” level
V
IN
=V
CE
= 5.0V, V
OUT
=0V
V
IN
=5.0V, V
CE
=0V, V
OUT
=0V
When connected to external components,
V
CE
=0V→V
IN
, I
OUT
=1mA
V
IN
=V
CE
=5.0V, V
OUT
=0.8×V
OUT(T)
,
Short Lx at 1Ω resistance
(*6)
Sweeping V
OUT
, V
IN
=V
CE
=5.0V,
Short Protection Threshold Voltage
Inductance Value
Allowed Inductor Current
V
SHORT
L
I
DC
Short Lx at 1Ω resistance, V
OUT
voltage which
Lx becomes “L” level within 1ms
Test Frequency=1MHz
ΔT=+40℃
-
-
1.5
700
-
-
μH
mA
-
-
<E-8>
<E-9>
<E-10>
V
⑦
Test conditions: Unless otherwise stated, V
IN
=5.0V, V
OUT(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)=(V
IN
- 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 V
OUT
with GND via 1Ω of resistor from an operational state and is set to Lx=0V from current limit pulse generating.
(*7)
When V
IN
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”=V
IN
~V
IN
-1.2V, “L”=+0.1V~-0.1V
(*11)
I
PFM
and DTY
LIMIT_PFM
are defined only for the XCL209 series.
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