ꢀ
ꢁ
ꢂ
ꢃ
ꢄ
ꢅ
ꢆ
ꢆ
ꢆꢇ ꢈ ꢁꢉ ꢊꢋꢌꢍꢉ ꢎꢏꢎꢉꢈ ꢁꢐ ꢑ ꢒꢐ ꢀꢁꢎꢓ ꢋ ꢉꢐ ꢔ ꢒꢋ ꢑꢁ ꢋꢑ
ꢇ ꢈꢁ ꢊ ꢑꢋꢓ ꢕ ꢀꢎꢁꢐ ꢑ
SLVS033F − FEBRUARY 1990 − REVISED NOVEMBER 2004
APPLICATION INFORMATION
12 V
5 µF
+
1
2
3
4
8
7
6
5
1
8
7
6
5
FB/SD
CAP+
V
FB/SD
CAP+
V
CC
CC
HP5082-2810
10 Ω
1/2 W
2
3
4
OSC
OSC
R1
39.2 kΩ
+
LT1054 #1
LT1054 #2
10 Ω
1/2 W
10 µF
GND
V
REF
GND
V
REF
0.002 µF
+
20 kΩ
R2
200 kΩ
CAP−
V
OUT
CAP−
V
OUT
+
10 µF
V
I
= −5 V
= 0-200 mA
O
O
200 µF
ŤV
Ť
ŤV
Ť
+
OUT
OUT
R2 + R1
) 1 + R1
) 1
ǒ Ǔ
ǒ Ǔ
V
1.21 V
REF * 40 mV
2
Pin numbers shown are for the P package.
Figure 28. Regulating 200-mA +12-V to −5-V Converter
15 V
5 µF
+
11
13
20 kΩ
16
Digital
Input
AD558
14
2.5 V
LT1004-2.5
15
1
2
3
8
7
6
5
12
FB/SD
CAP+
V
CC
20 kΩ
OSC
LT1054
+
GND
V
REF
10 µF
4
V
O
= −V (Programmed)
I
CAP−
V
OUT
100 µF
+
Pin numbers shown are for the P package.
Figure 29. Digitally Programmable Negative Supply
21
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
