Datasheet

LT1054
SWITCHED-CAPACITOR VOLTAGE CONVERTERS
WITH REGULATORS
SLVS033F − FEBRUARY 1990 − REVISED NOVEMBER 2004
16
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
LT1054
V
OUT
V
REF
OSC
V
CC
CAP−
GND
CAP+
FB/SD
R
X
V
IN
V
OUT
10 μF
100 μF
Q
X
V
IN
V
IN
= −3.5 V to −15 V
V
OUT
= 2 V
IN
+ (LT1054 Voltage Loss) + (Q
X
Saturation Voltage)
2 μF
Pin numbers shown are for the P package.
1
2
3
4
8
7
6
5
+
−
+
+
+
Figure 21. Negative-Voltage Doubler
V
IN
3.5 V to 15 V
1N40011N4001
V
OUT
LT1054
V
OUT
V
REF
OSC
V
CC
CAP−
GND
CAP+
FB/SD
2 μF
10 μF
100 μF
V
IN
= 3.5 V to 15 V
V
OUT
≈ 2 V
IN
− (V
L
+ 2 V
Diode
)
V
L
= LT1054 Voltage Loss
Pin numbers shown are for the P package.
+
+
−
+
1
2
3
4
8
7
6
5
+
Figure 22. Positive-Voltage Doubler