CAT37 Datasheet, PDF (3/11 Pages) Catalyst Semiconductor – CMOS White LED Driver Boost Converter

CAT37
Table 4. ELECTRICAL OPERATING CHARACTERISTICS
(Over recommended operating conditions unless otherwise specified. T_A = 25°C, V_IN = 3 V and V_SHDN = 3 V.)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Input Voltage Range
2.5
7
V
I_Q
Quiescent Current
I_SD
Shutdown Current
V_FB
FB Pin Voltage
I_FB
FB Pin Leakage Current
Shutdown High Threshold
V_FB = 0.2 V
V_SHDN = 0 V
4 LEDs at 15 mA
0.5
0.7
mA
0.05
1
mA
85
95
105
mV
1
2
mA
0.85
V
Shutdown Low Threshold
0.25
V
I_SHDN
f_SW
DC
Shutdown Pin Current
Boost Converter Frequency
Maximum Switch Duty Cycle
1
nA
0.8
1.2
1.6
MHz
90
95
%
I_SWL
Switch Current Limit
Switch Saturation Voltage
Switch Leakage Current
Efficiency
I_SW = 300 mA
Switch Off, V_SW = 5 V
Figure 1 with specified components
400
550
780
mA
150
200
mV
0.01
5
mA
83
%
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