LTC1261
TYPICAL APPLICATIONS N
5V Input, – 4V Output GaAs FET Bias Generator
5V
1µF
VBAT
SHUTDOWN
0.1µF
1
VCC
SHDN 8
2 C1+
REG 7
LTC1261-4
3 C2–
OUT 6
4
5
GND COMP
P-CHANNEL
POWER SWITCH
10k
– 4V BIAS
+ 3.3µF
100pF
GaAs
TRANSMITTER
LTC1261 • TA04
7 Cells to – 1.24V Output GaAs FET Bias Generator
VBAT = 8.4V
(7 NiCd CELLS)
SHUTDOWN
1µF
0.1µF
1 VCC
SHDN 8
2 C1+
7
REG
3
LTC1261
C2–
OUT
6
4
GND
5
ADJ
P-CHANNEL
POWER SWITCH
10k
–1.24V BIAS
+ 3.3µF
GaAs
TRANSMITTER
LTC1261 • TA05
5V
1µF
1mV Ripple, 5V Input, – 4V Output GaAs FET Bias Generator
VBAT
SHUTDOWN
0.1µF
1
VCC
8
SHDN
2 C1+
7
REG
LTC1261-4
3 C2–
6
OUT
4 GND COMP 5
P-CHANNEL
POWER SWITCH
10k
100pF
100µH
– 4V BIAS
+ 10µF + 10µF
GaAs
TRANSMITTER
LTC1261 • TA06
12