CAT4137 Datasheet, PDF (3/16 Pages) Catalyst Semiconductor – CMOS Boost Converter - White LED Driver

CAT4137
TYPICAL CHARACTERISTICS
V_IN = 3.6V, C_IN = 1.0uF, C_OUT = 0.22µF, L = 22µH with 3 LEDs at 20mA, T_AMB=25ºC, unless otherwise specified.
Quiescent Current vs. VIN (Not Switching)
120
VFB = 0.4V
100
80
Quiescent Current vs. VIN (Switching)
1.00
0.75
60
0.50
40
0.25
20
0
2.5 3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE [V]
0.00
2.5 3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE [V]
FB Pin Voltage vs. Supply Voltage
310
3 LEDs
305
FB Pin Voltage vs. Output Current
310
3 LEDs
305
300
295
290
2.5 3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE [V]
Switching Frequency vs. Supply Voltage
1.10
300
295
290
0
5 10 15 20 25 30
OUTPUT CURRENT [mA]
Switch ON Resistance vs. Input Voltage
2.0
1.05
1.5
3 LEDs at 20mA
1.00
1.0
0.95
0.5
0.90
2.5 3.0 3.5 4.0 4.5
INPUT VOLTAGE [V]
0.0
2.5 3.0 3.5 4.0 4.5 5.0
INPUT VOLTAGE [V]
© Catalyst Semiconductor, Inc.
3
Characteristics subject to change without notice
Doc. No. MD-5012 Rev. B