LT1054_06 Datasheet, PDF (18/27 Pages) Texas Instruments – SWITCHED-CAPACITOR VOLTAGE CONVERTERS WITH REGULATORS

LT1054
SWITCHEDĆCAPACITOR VOLTAGE CONVERTERS
WITH REGULATORS
SLVS033F − FEBRUARY 1990 − REVISED NOVEMBER 2004
APPLICATION INFORMATION
1N4001
+
1N4001
VI
3.5 V to 15 V
+VO
−
+
100 µF
+
10 µF
1
FB/SD
2
CAP+
8
VCC
7
OSC
+
10 µF
+
10 µF
3
LT1054
6
GND
VREF
4
CAP−
5
VOUT
100 µF
+
1N4001
1N4001
−
VI = 3.5 V to 15 V
+VO ≈ 2 VIN − (VL + 2 VDiode) −VO ≈ −2 VI + (VL + 2 VDiode)
VL = LT1054 Voltage Loss
Pin numbers shown are for the P package.
1N4001
100 µF
+
−VO
+
Figure 24. Dual-Output Voltage Doubler
VI = 5 V
5 µF
+
10 µF
1
FB/SD
8
VCC
2
CAP+
7
OSC
LT1054 #1
3
6
GND
VREF
4
CAP−
5
VOUT
Pin numbers shown are for the P package.
VO _≈ +12 V
IO = 25 mA
+
100 µF
1N914
+
10 µF
2N2219
100 µF
1 kΩ
+
10 µF
5 µF
+
1N914
1
FB/SD
8
VCC
2
CAP+
OSC
LT1054 #2
3
GND
VREF
4
CAP−
VOUT
7
CAP− of
LT1054 #1
6
20 kΩ
5
VO ≈ −12 V
IO = 25 mA
100 µF
+
Figure 25. 5-V to ±12-V Converter
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