LT1111
U
O
TYPICAL APPLICATI S
3V to –22V LCD Bias Generator
L1*
27µH
1N4148
R1
100Ω
732k
1%
I
V
LIM
IN
SW1
2 × 1.5V
CELLS
LT1111
3V
0.1µF
FB
GND
SW2
+
4.7µF
39.2k
1%
MBRS130T3
MBRS130T3
+
22µF
220k
* L1 = SUMIDA CD54-270K
–22V OUTPUT
FOR 5V INPUT CHANGE R1 TO 47Ω.
7mA AT 2V INPUT
CONVERTER WILL DELIVER –22V AT 40mA.
LT1111 • TA03
20V to 5V Step-Down Converter
9V to 5V Step-Down Converter
V
IN
12V TO 28V
100Ω
100Ω
V
I
IN
SW1
LIM
I
V
LIM
IN
SW1
9V
BATTERY
LT1111-5
LT1111-5
SENSE
SW2
SENSE
SW2
GND
L1*
GND
L1*
68µH
15µH
5V OUTPUT
150mA AT 9V INPUT
50mA AT 6.5V INPUT
5V OUTPUT
300mA
+
MBRS130T3
22µF
+
47µF
MBRS130T3
* L1 = SUMIDA CD54-150K
LT1111 • TA04
* L1 = SUMIDA CD74-680M
LT1111 • TA06
14
Linear [ Linear ]
