CAT4238
TYPICAL CHARACTERISTICS
V
IN
= 3.6V, C
IN
= 4.7μF, C
OUT
= 0.22µF, L = 47µH with 10 LEDs at 20mA, T
AMB
= 25ºC, unless otherwise specified.
Quiescent Current vs. VIN (Not Switching)
QUIESCENT CURRENT [μA] .
150
VFB = 0.4V
125
Quiescent Current vs. VIN (Switching)
2.0
QUIESCENT CURRENT [mA]
1.5
100
1.0
75
50
3.0
3.5
4.0
4.5
5.0
5.5
INPUT VOLTAGE [V]
0.5
0.0
3.0
3.5
4.0
4.5
5.0
5.5
INPUT VOLTAGE [V]
FB pin voltage vs. Temperature
303
FB PIN VOLTAGE [mV]
FB Pin Voltage vs. Output Current
310
FB PIN VOLTAGE [mV]
305
302
301
300
299
298
297
-50
0
50
100
150
TEMPERATURE [ºC]
300
295
10 LEDs
290
5
10
15
20
25
30
OUTPUT CURRENT [mA]
Switching Frequency vs. Supply Voltage
SWITCHING FREQUENCY [MHz]
1.2
Switching Waveforms
1.1
1.0
0.9
0.8
3.0
3.5
4.0
4.5
5.0
5.5
INPUT VOLTAGE [V]
© 2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
5
Doc. No. MD-5019 Rev. E
ONSEMI [ ON SEMICONDUCTOR ]
