ꢀꢁ 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 = 5 V
I
2 µF
+
50 kΩ
1
2
3
4
8
1N5817
10 µF
FB/SD
CAP+
V
CC
1N5817
7
6
5
V
8 V
O
+
OSC
+
LT1054
10 kΩ
100 µF
0.03 µF
10 kΩ
5 V
1/2
GND
V
REF
5.5 kΩ
10 kΩ
CAP−
V
OUT
−
LT1013
+
2.5 kΩ
0.1 µF
Pin numbers shown are for the P package.
Figure 30. Positive Doubler With Regulation (5-V to 8-V Converter)
V
I
3.5 V to 15 V
2 µF
1
2
3
8
+
FB/SD
CAP+
GND
V
CC
7
6
5
OSC
R1
60 kΩ
LT1054
+
+
10 µF
10 µF
V
REF
100 µF
4
+
CAP−
V
OUT
R2
1 MΩ
+
0.002 µF
1N4001
1N4001
−V
O
V = 3.5 V to 15 V
I
100 µF
V
O
V
L
MAX ≈ 2 V + (V + 2 V )
IN Diode
= LT1054 Voltage Loss
L
+
ŤV
Ť
ŤV Ť
) 1 + R1 ) 1
OUT
OUT
R2 + R1
ǒ Ǔ
ǒ Ǔ
V
1.21 V
REF * 40 mV
2
Pin numbers shown are for the P package.
Figure 31. Negative Doubler With Regulator
22
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
