Datasheet

14
LT1111
1111fd
U
SA
O
PP
L
IC
AT
ITY
P
I
CA
L
3V to –22V LCD Bias Generator
9V to 5V Step-Down Converter
20V to 5V Step-Down Converter
LT1111 • TA03
LIM
I
GND
R1
100Ω
LT1111
MBRS130T3
4.7µF
L1*
27µH
–22V OUTPUT
7mA AT 2V INPUT
* L1 = SUMIDA CD54-270K
FOR 5V INPUT CHANGE R1 TO 47Ω.
CONVERTER WILL DELIVER –22V AT 40mA.
2 × 1.5V
CELLS
3V
FB
22µF 220k
0.1µF
1N4148
39.2k
1%
732k
1%
MBRS130T3
+
+
IN
V
SW2
SW1
LT1111 • TA04
LIM
I
SENSE
GND
100
9V
BATTERY
LT1111-5
MBRS130T3
22µF
L1*
15µH
Ω
5V OUTPUT
150mA AT 9V INPUT
50mA AT 6.5V INPUT
* L1 = SUMIDA CD54-150K
IN
V
SW2
SW1
+
LT1111 • TA06
100
MBRS130T3
47µF
L1*
68µH
Ω
5V OUTPUT
300mA
* L1 = SUMIDA CD74-680M
V
IN
12V TO 28V
+
IN
V
SW2
SW1
LIM
I
SENSE
GND
LT1111-5
5V to –5V Converter
LT1111 • TA05
100
MBRS130T3
33µF
L1*
33µH
Ω
–5V OUTPUT
75mA
22µF
V
IN
5V INPUT
* L1 = SUMIDA CD54-330K
+
+
IN
V
SW2
SW1
LIM
I
SENSE
GND
LT1111-5
Voltage Controlled Positive-to-Negative Converter
LT1111 • TA07
220Ω
* L1 = COILTRONICS CTX20-4
†
ZETEX INC. 516-543-7100
V
IN
5V TO 12V
BAT54
220Ω
L1*
20µH, 3A
–
+
IN
V
LT1006
47µF
39k
200k
–V
OUT
= –5.13 × V
C
2W MAXIMUM OUTPUT
V
C
(0V TO 5V)
0.22Ω
MBRD320
ZETEX
†
ZTX788A
FB
GND
LT1111
IN
V
SW2
SW1
LIM
I
+