SP1938 Datasheet, PDF (4/6 Pages) SYNC POWER Crop. – DC-DC Step-Up Converter for White LED

SP1938
DC-DC Step-Up Converter for White LED
ELECTRICAL CHARACTERISTICS
(TA=25℃, VIN=3V, VSHDN=3V, Unless otherwise specified)
Parameter
Operating Voltage
Feedback Voltage
FB Pin Bias Current
Supply Current
Switching Frequency
Maximum Duty Cycle
Switch Current Limit
Switch Leakage Current
Switch Saturation Voltage
SHDN Voltage High
SHDN Voltage Low
SHDN Pin Current
Over Voltage Protection
APPLICATION CIRCUIT
Conditions
ISW=100mA, Duty Cycle = 66%
VSHDN = 0V
Vsw= 5V
Isw = 200mA
VOUT rising
Min.
2.5
86
0.8
1.5
Typ. Max.
18
110
150
2.8 3.5
0.1 1.0
1.2 1.6
85
320
0.01 5
150
0.4
90
21
Unit
V
%
nA
mA
μA
MHz
%
mA
μA
mV
V
V
uA
V
2009/03/30 Ver.1
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