SP1938
DC-DC Step-Up Converter for White LED
ELECTRICAL CHARACTERISTICS
(TA=25℃, VIN=3V, VSHDN=3V, Unless otherwise specified)
Parameter
Operating Voltage
Conditions
Min.
2.5
Typ. Max.
Unit
V
18
Feedback Voltage
FB Pin Bias Current
Supply Current
ISW=100mA, Duty Cycle = 66%
86
110
150
3.5
1.0
1.6
%
nA
mA
μA
MHz
%
mA
μA
mV
V
2.8
0.1
1.2
VSHDN = 0V
Switching Frequency
Maximum Duty Cycle
Switch Current Limit
Switch Leakage Current
Switch Saturation Voltage
SHDN Voltage High
SHDN Voltage Low
SHDN Pin Current
0.8
1.5
85
320
0.01
150
Vsw= 5V
Isw = 200mA
5
0.4
V
uA
V
90
21
Over Voltage Protection
VOUT rising
APPLICATION CIRCUIT
2009/03/30 Ver.1
Page 4
SYNC-POWER [ SYNC POWER CROP. ]
