Datasheet

LT1054
SWITCHED-CAPACITOR VOLTAGE CONVERTERS
WITH REGULATORS
SLVS033F − FEBRUARY 1990 − REVISED NOVEMBER 2004
20
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
1N5817
1N914
2N2219
R2
125 kΩ
R2
125 kΩ
R1
20 kΩ
1N914
(All)
V
I
3.5 V to 5.5 V
FB/SD
CAP+
GND
CAP−
V
CC
OSC
V
REF
V
OUT
LT1054
+
V
REF
LTC1044
V
OUT
OSC
V
CC
CAP−
GND
CAP+
FB/SD
V
O
1 μF
1 μF
3 kΩ
100 μF
5 μF
10 μF
20 kΩ
0.002 μF
V
I
= 3.5 V to 5.5 V
V
O
= 5 V
I
O
MAX = 50 mA
Pin numbers shown are for the P package.
R2 + R1
ǒ
Ť
V
OUT
Ť
V
REF
2
* 40 mV
) 1
Ǔ
+ R1
ǒ
Ť
V
OUT
Ť
1.21 V
) 1
Ǔ
+
1
2
4
8
7
6
5
3
1
2
4
8
7
6
5
3
+
+
+
−
+
Figure 27. 3.5-V to 5-V Regulator