SP1937 Datasheet, PDF (4/10 Pages) SYNC POWER Crop. – DC-DC Step-Up Converter for White LED

SP1937
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 Vcesat
SHDN Voltage High
SHDN Voltage Low
SHDN Pin Bias Current
Conditions
ISW=100mA, Duty Cycle = 66%
VSHDN = 0V
VSW= 5V
ISW = 200mA
Min.
2.5
86
0.8
1.5
Typ. Max.
20.0
110
150
2.8 3.5
0.1 1.0
1.2 1.6
85
320
0.01 5
150
0.4
90
Unit
V
mV
nA
mA
μA
MHz
%
mA
μA
mV
V
V
uA
2007/07/10 Ver.3
Page 4