Datasheet

LT1054/LT1054L
12
1054lfg
TYPICAL APPLICATIONS
3.5V to 5V Regulator
Regulating 200mA, 12V to –5V Converter
Digitally Programmable Negative Supply
5µF
100µF
20k
1N914
R1
20k
1N914
V
IN
= 3.5V TO 5.5V
V
OUT
= 5V
I
OUT(MAX)
= 50mA
1N914
1N5817
V
IN
3.5V TO 5.5V
LT1054 • TA10
LTC1044
1
2
3
4
8
7
6
5
1µF
1µF
0.002µF
R2
125k
3k
1N914
R2
125k
2N2219
V
OUT
= 5V
+
–
10µF
+
+
+
+
+
LT1054
FB/SHDN
CAP
+
GND
CAP
–
V
+
OSC
V
REF
V
OUT
0.002µF
HP5082-2810
V
OUT
= –5V
I
OUT
= 0mA to 200mA
12V
R1
39.2k
R2
200k
20k
10Ω
1/2W
LT1054 • TA11
10Ω
1/2W
10µF
5µF
200µF
10µF
+
+
+
+
LT1054 #1
FB/SHDN
CAP
+
GND
CAP
–
V
+
OSC
V
REF
V
OUT
LT1054 #2
FB/SHDN
CAP
+
GND
CAP
–
V
+
OSC
V
REF
V
OUT
REFER TO FIGURE 5
R2
R1
= =+ 1
|V
OUT
|
) )
V
REF
2
– 40mV
) )
+ 1 ,
|V
OUT
|
1.21V
20k
V
OUT
= –V
IN
(PROGRAMMED)
20k
15V
LT1004-2.5
2.5V
LT1054 • TA12
AD558
16
11
14
DIGITAL
INPUT
13 12
10µF
5µF
+
100µF
+
+
LT1054
FB/SHDN
CAP
+
GND
CAP
–
V
+
OSC
V
REF
V
OUT