LT3498
TYPICAL APPLICATIONS
Li-Ion to Four White LEDs and OLED/LCD Bias
V
= 3V TO 5V
C
C2
0.47µF
IN
IN
4.7µF
L1
15µH
L2
10µH
16V
24mA
CAP1 SW1
V
SW2
CAP2 V
OUT2
C3
10µF
IN
C1
1µF
LT3498
R
R
SENSE1
FB2
LED1 CTRL1 GND1 GND2 CTRL2
OFF OFF
FB2
10Ω
2.21MΩ
ON
ON
SHUTDOWN
SHUTDOWN
AND
AND
DIMMING
CONTROL
CONTROL
20mA
3498 TA05
C
, C2: X5R OR X7R WITH SUFFICIENT VOLTAGE RATING
IN
C1: TAIYO YUDEN GMK212BJ105KG
C3: TAIYO YUDEN TMK316BJ106ML
L1: MURATA LQH32CN150K53
L2: MURATA LQH32CN100K53
LED Efficiency
= 3.6V, 4 LEDs
V
IN
80
75
70
65
60
55
50
0
5
10
20
15
LED CURRENT (mA)
3498 TA05b
3498f
21