LT1054_06 Datasheet, PDF (21/27 Pages) Texas Instruments – SWITCHED-CAPACITOR VOLTAGE CONVERTERS WITH REGULATORS

LT1054
SWITCHEDĆCAPACITOR VOLTAGE CONVERTERS
WITH REGULATORS
SLVS033F − FEBRUARY 1990 − REVISED NOVEMBER 2004
APPLICATION INFORMATION
5 µF
+
12 V
10 Ω
1/2 W
1
FB/SD
8
VCC
2
CAP+
7
OSC
3
LT1054 #1
R1
6 ^{39.2 kΩ}
GND
VREF
0.002 µF
+
1
FB/SD
10 Ω
1/2 W ₂
CAP+
8
VCC
7
OSC
+
10 µF
LT1054 #2
3
6
GND
VREF
20 kΩ
HP5082-2810
4
+
CAP−
10 µF
5
VOUT
R2
200 kΩ
4
CAP−
5
VOUT
+ ^{200 µF}
ǒ Ǔ ǒ Ǔ R2 + R1
Ť_V Ť
VREF
2
OUT
* 40
mV
)
1
Ť_V Ť
+ R1
OUT
1.21 V
)
1
VO = −5 V
IO = 0-200 mA
Pin numbers shown are for the P package.
Figure 28. Regulating 200-mA +12-V to −5-V Converter
5 µF
+
15 V
11
20 kΩ
16
AD558
+
10 µF
1
FB/SD
8
VCC
2.5 V
LT1004-2.5 ₁₅
2
CAP+
7
OSC
LT1054
3
6
GND
VREF
20 kΩ
4
CAP−
5
VOUT
100 µF
+
VO = −VI (Programmed)
14 13 12
Pin numbers shown are for the P package.
Figure 29. Digitally Programmable Negative Supply
Digital
Input
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