LTC1693 Linear Technology, LTC1693 Datasheet - Page 15

• Manufacturer Part Number: LTC1693
• Description: High Speed Single/Dual MOSFET Drivers
• Manufacturer: Linear Technology

TYPICAL APPLICATIONS
18
16
14
12
10
8
6
35
V
50mA LOAD
CC
= 5V
40
Output Voltage
45
DUTY CYCLE (%)
50
55
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
U
C1
680pF
BAT85
60
D1
1693 TA06b
C2
0.1 F
1
65
LTC1693-3
13k
1%
R2
4
8
5V to 12V Boost Converter
+
3
7.5k
1%
R1
C3
4.7 F
7
V
CC
= 5V
Q1
BS170
L1*
22 H
1N5819
D2
100
50
+
90
80
70
60
1693 TA06a
10
V
50mA LOAD
C
47 F
CC
L
= 5V
11
V
12V
50mA
OUTPUT VOLTAGE (V)
OUT
12
Efficiency
13
14
15
1693 TA06c
LTC1693
16
15