LT1054 Datasheet, PDF (22/26 Pages) Linear Technology – Switched-Capacitor Voltage Converter with Regulator

LT1054
SWITCHEDĆCAPACITOR VOLTAGE CONVERTERS
WITH REGULATORS
SLVS033F − FEBRUARY 1990 − REVISED NOVEMBER 2004
APPLICATION INFORMATION
VI = 5 V
2 µF
+
VO
8V
+
100 µF
1N5817
1N5817
10 µF
+
5.5 kΩ
10 kΩ
2.5 kΩ
0.03 µF _{10 kΩ}
5V
−
1/2
LT1013
+
50 kΩ
10 kΩ
1
FB/SD
8
VCC
2
CAP+
7
OSC
LT1054
3
6
GND
VREF
4
CAP−
5
VOUT
0.1 µF
Pin numbers shown are for the P package.
Figure 30. Positive Doubler With Regulation (5-V to 8-V Converter)
+
10 µF
+
10 µF
1
FB/SD
VCC
VI
3.5 V to 15 V
2 µF
8
+
2
CAP+
7
OSC
LT1054
3
GND
6
VREF
4
CAP−
5
VOUT
R1
60 kΩ
100 µF
+
1N4001
1N4001
R2
1 MΩ
VI = 3.5 V to 15 V
VO MAX ≈ 2 VIN + (VL + 2 VDiode)
VL = LT1054 Voltage Loss
ǒ Ǔ ǒ Ǔ R2 + R1
Ť_V Ť
VREF
2
OUT
* 40
mV
)
1
Ť_V Ť
+ R1
OUT
1.21 V
)
1
Pin numbers shown are for the P package.
+ ^{100 µF}
Figure 31. Negative Doubler With Regulator
+
0.002 µF
−VO
22
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