LTC1693
U
TYPICAL APPLICATIONS
Charge Pump Tripler
R1
11k
1%
V
= 5V
CC
V
CC
= 5V
C2
1µF
D1
1N5817
C3
1µF
D2
1N5817
D3
1N5817
D4
1N5817
8
1
7
LTC1693-3
4
V
OUT
+
+
3
C4
3.3µF
C
L
47µF
C5
1µF
C1
680pF
1693 TA09a
R1, C1 SET THE OSCILLATION FREQUENCY AT 150kHz
AND THE DUTY CYCLE AT 35%
Efficiency
Output Voltage
18
16
14
12
10
8
90
80
70
60
50
40
30
20
10
0
V
= 5V
V
= 5V
CC
CC
6
4
2
0
0
10 20 30 40 50
100
0
10 20 30 40 50 60 70 80 90 100
OUTPUT CURRENT (mA)
60 70 80 90
OUTPUT CURRENT (mA)
1693 TA09b
1693 TA09c
18