Datasheet

LTC1261
13
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For more information www.linear.com/LTC1261
TYPICAL APPLICATIONS
High Supply Voltage, –5V Output GaAs FET Bias Generator
Low Output Voltage Generator –5V Supply Generator
Minimum Parts Count –4V Generator
2
3
4
5
8
13
12
11
10
9
SHDN
REG
OUT
ADJ
R
ADJ
C1
+
C1
–
C2
+
C2
–
R1
0.1µF
100pF
1µF
1N4733A
5.1V
NC
NC
LTC1261 • TA07
3.3µF
–5V BIAS
10k
7 6
14
0.1µF
SHUTDOWN
8V ≤ V
BAT
≤ 12V
LTC1261
V
CC
R0 GND
GaAs
TRANSMITTER
P-CHANNEL
POWER SWITCH
+
2
3
5
6
LTC1261
ADJ
OUT
C1
+
C1
–
LTC1261 • TA10
3.3µF
= V
CC
– 10µA (R
S
+ 124k)
= –0.5V (R
S
= 426k)
= –1V (R
S
= 476k)
1N5817
1
5V
4
0.1µF
1µF
100pF
R
S
V
OUT
V
CC
GND
124k
+
2
3
4
5
10
9
8
7
11
ADJ
R
ADJ
R1
R0
OUT
C1
+
C1
–
C2
+
C2
–
0.1µF
LTC1261 • TA09
NC
NC
6
14
0.1µF
100pF
1µF
LTC1261
3V ≤ V
CC
≤ 7V
V
CC
GND
3.3µF
–5V 5%
AT 10mA
+
1
2
3
4
8
7
6
5
LTC1261-4
SHDN
REG
OUT
COMP
V
CC
C1
+
C1
–
GND
0.1µF
LTC1261 • TA12
3.3µF
V
OUT
= –4V
at 10mA
5V
1µF
+