LT1054 Datasheet, PDF (20/26 Pages) Linear Technology – Switched-Capacitor Voltage Converter with Regulator

LT1054
SWITCHEDĆCAPACITOR VOLTAGE CONVERTERS
WITH REGULATORS
SLVS033F − FEBRUARY 1990 − REVISED NOVEMBER 2004
APPLICATION INFORMATION
VI
3.5 V to 5.5 V
20 kΩ
1
FB/SD
8
VCC
1N914
(All)
+
10 µF
1
FB/SD
8
VCC
2
CAP+
7
OSC
LT1054
3
6
GND
VREF
+
5 µF
R1
20 kΩ
4
CAP−
0.002 µF
5
VOUT
+
1 µF
R2
125 kΩ
2
CAP+
7
OSC
LTC1044
3
6
GND
VREF
4
CAP−
5
VOUT
R2
125 kΩ
+
100 µF
+
3 kΩ VO
−
1 µF
+
VI = 3.5 V to 5.5 V
VO = 5 V
IO MAX = 50 mA
ǒ Ǔ ǒ Ǔ R2 + R1
Ť Ť _VOUT
VREF
2
*
40
mV
)
1
Ť_V Ť
+ R1
OUT
1.21 V
)
1
Pin numbers shown are for the P package.
1N5817
2N2219
1N914
Figure 27. 3.5-V to 5-V Regulator
20
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