Datasheet

LT1054
SWITCHED-CAPACITOR VOLTAGE CONVERTERS
WITH REGULATORS
SLVS033F − FEBRUARY 1990 − REVISED NOVEMBER 2004
18
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
V
REF
+V
O
LT1054
V
OUT
OSC
V
CC
CAP−
GND
CAP+
FB/SD
10 μF
10 μF
100 μF
10 μF
100 μF
−V
O
100 μF
V
I
3.5 V to 15 V
V
I
= 3.5 V to 15 V
+V
O
≈ 2 V
IN
− (V
L
+ 2 V
Diode
) −V
O
≈ −2 V
I
+ (V
L
+ 2 V
Diode
)
V
L
= LT1054 Voltage Loss
1N4001
1N4001
1N4001
1N40011N4001
Pin numbers shown are for the P package.
+
+
+
1
2
3
4
8
7
6
5
+
+
−
+
+
−
+
Figure 24. Dual-Output Voltage Doubler
CAP− of
LT1054 #1
1N914
V
I
= 5 V
2N2219
1 kΩ
5 μF
10 μF
100 μF 10 μF
100 μF
5 μF
100 μF
20 kΩ
LT1054 #1
V
OUT
V
REF
OSC
V
CC
CAP−
GND
CAP+
FB/SD
10 μF
LT1054 #2
V
OUT
V
REF
OSC
V
CC
CAP−
GND
CAP+
FB/SD
V
O
≈ −12 V
I
O
= 25 mA
V
O
≈
+12 V
I
O
= 25 mA
1N914
Pin numbers shown are for the P package.
++
+
+
+
+
+
1
2
3
4
8
7
6
5
1
2
4
8
7
6
5
3
Figure 25. 5-V to ±12-V Converter