ꢀꢁ ꢂꢃ ꢄꢅ
ꢆ ꢇꢈ ꢁ ꢉꢊ ꢋꢌ ꢍꢉ ꢎ ꢏꢎꢉ ꢈ ꢁꢐ ꢑ ꢒ ꢐꢀꢁꢎꢓ ꢋ ꢉꢐ ꢔ ꢒꢋꢑꢁ ꢋ ꢑꢆ
ꢇꢈ ꢁ ꢊ ꢑ ꢋꢓꢕ ꢀ ꢎꢁꢐ ꢑꢆ
SLVS033F − FEBRUARY 1990 − REVISED NOVEMBER 2004
APPLICATION INFORMATION
V
I
3.5 V to 15 V
1N4001
1N4001
+
−
+
+V
O
100 µF
+
1
2
8
7
10 µF
FB/SD
V
CC
CAP+
GND
OSC
LT1054
3
4
6
+
+
V
REF
10 µF
10 µF
100 µF
5
+
V
OUT
CAP−
1N4001
1N4001
−
+
V = 3.5 V to 15 V
I
1N4001
−V
O
100 µF
+
+V ≈ 2 V − (V + 2 V
) −V ≈ −2 V + (V + 2 V )
Diode
O
L
IN Diode
L
O
I
L
V
= LT1054 Voltage Loss
Pin numbers shown are for the P package.
Figure 24. Dual-Output Voltage Doubler
V = 5 V
I
+
5 µF
1N914
1N914
V
+12 V
O ≈
= 25 mA
I
O
1
2
3
4
8
FB/SD
CAP+
V
CC
+
+
+
100 µF
10 µF
1
8
7
6
OSC
FB/SD
V
CC
LT1054 #1
2
CAP− of
LT1054 #1
7
6
+
OSC
GND
V
REF
CAP+
GND
10 µF
LT1054 #2
10 µF
5 µF
5
3
4
2N2219
CAP−
V
V
REF
OUT
20 kΩ
5
100 µF
V
I
≈ −12 V
= 25 mA
O
O
+
1 kΩ
CAP−
V
OUT
100 µF
+
Pin numbers shown are for the P package.
Figure 25. 5-V to 12-V Converter
18
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
