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AP5725
WHITE LED STEP-UP CONVERTER
Electrical Characteristics (V IN = 3.6V, T A = 25°C, unless otherwise specified.)
Symbol
Parameter
Conditions
Min
Typ.
Max
Unit
System Supply Input
V IN
Operating Input Voltage
2.7
-
5.5
V
UVLO Under Voltage Lockout
Under Voltage Lockout Hysteretic
-
-
2.2
85
2.4
-
V
mV
I Q
I SD
Quiescent Current
Shutdown Current
FB=0.35V, No Switching
V EN < 0.4V
-
-
500
0.1
-
1
μ A
μ A
Oscillator
F OSC
Operation Frequency
1
1.2
1.4
MHz
Dmax Maximum Duty Cycle
86
90
-
%
Reference Voltage
V FB
I FB
Feedback Voltage
FB Pin Bias Current
0.225
10
0.25
45
0.275
100
V
nA
MOSFET
Rds(on) On Resistance of MOSFET
-
0.95
1.2
?
I OCP
Switching Current Limit
Normal Operation
-
750
-
mA
Control and Protection
EN Voltage High
EN Voltage Low
ON
OFF
1.5
-
-
-
-
0.4
V
V
I EN
EN Pin Pull Low Current
-
4
6
μ A
OVP OVP Threshold
26
30
34
V
C/W
C/W
θ JA
θ JC
Thermal Resistance Junction-to-
Ambient
Thermal Resistance Junction-to-
Case
SOT26 (Note 2)
TSOT23-6 (Note 2)
DFN2020C-6 (Note2)
SOT26 (Note 2)
TSOT23-6 (Note 2)
DFN2020C-6 (Note 2)
162
152
200
36
32
30
o
o
Notes:
2. Test condition for SOT26, TSOT23-6 and DFN2020C-6: Device mounted on FR-4 substrate, single-layer PC board, 2oz copper,
with minimum recommended pad layout
AP5725
Document number: DS31844 Rev. 3 - 2
4 of 17
www.diodes.com
July 2010
? Diodes Incorporated
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