ꢀꢁ ꢂꢃ ꢄꢅ
ꢆ ꢇꢈ ꢁ ꢉꢊ ꢋꢌ ꢍꢉ ꢎ ꢏꢎꢉ ꢈ ꢁꢐ ꢑ ꢒ ꢐꢀꢁꢎꢓ ꢋ ꢉꢐ ꢔ ꢒꢋꢑꢁ ꢋ ꢑꢆ
ꢇꢈ ꢁ ꢊ ꢑ ꢋꢓꢕ ꢀ ꢎꢁꢐ ꢑꢆ
SLVS033F − FEBRUARY 1990 − REVISED NOVEMBER 2004
APPLICATION INFORMATION
V
I
3.5 V to 5.5 V
1
2
3
8
7
6
5
20 kΩ
FB/SD
CAP+
V
CC
OSC
+
LTC1044
1 µF
1N914
(All)
GND
V
REF
1
2
3
8
7
6
5
4
FB/SD
CAP+
V
CC
CAP−
V
OUT
+
5 µF
R1
R2
OSC
125 kΩ
LT1054
+
20 kΩ
10 µF
GND
V
REF
+
1 µF
+
+
0.002 µF
R2
125 kΩ
V
O
3 kΩ
4
100 µF
CAP−
V
OUT
−
V = 3.5 V to 5.5 V
I
O
O
V
I
= 5 V
MAX = 50 mA
2N2219
1N914
ŤV
Ť
) 1
ŤV
Ť
1N5817
OUT
OUT
R2 + R1
) 1 + R1
ǒ Ǔ
ǒ Ǔ
V
1.21 V
REF * 40 mV
2
Pin numbers shown are for the P package.
Figure 27. 3.5-V to 5-V Regulator
20
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
