Datasheet

15
LTC1693
TYPICAL APPLICATIONS
U
5V to 12V Boost Converter
Output Voltage
Efficiency
+
4
3
8
V
CC
= 5V
C1
680pF
C2
0.1µF
C3
4.7µF
+
C
L
47µF
1693 TA06a
V
OUT
12V
50mA
INDUCTOR PEAK CURRENT ≈600mA
R2, C1 SET THE OSCILLATION FREQUENCY AT 200kHz
R1 SETS THE DUTY CYCLE AT 45%
EFFICIENCY ≈80% AT 50mA LOAD
*SUMIDA CDRH125-220
R2
13k
1%
R1
7.5k
1%
D1
BAT85
D2
1N5819
L1*
22µH
Q1
BS170
71
LTC1693-3
DUTY CYCLE (%)
35
6
OUTPUT VOLTAGE (V)
8
10
12
14
18
40
45 50 55
1693 TA06b
60 65
16
V
CC
= 5V
50mA LOAD
OUTPUT VOLTAGE (V)
10
50
EFFICIENCY (%)
60
70
80
90
100
11
12 13 14
1693 TA06c
15 16
V
CC
= 5V
50mA LOAD