LTC3101
TYPICAL APPLICATIONS
Manual Enable with Simultaneous Start-Up
V
= 3.3V
OUT3
300mA FOR V ≥ 1.8V
IN
+
C4
10μF
C3
10μF
800mA FOR V ≥ 3V
IN
2 AA
CELLS
R1
1M
4.7μH
R2
221k
BAT1 BAT2 SW3A SW3B OUT3
USB POWER
4.3V TO 5.5V
USB1
USB2
FB3
HSO
Hot Swap OUTPUT
C2
10μF
3.3V
C5
4.7μF
100mA
TRACKING OUTPUT
200mA
MAX
PWM
C6
4.7μF
PWRON
1.8V
50mA
LDO
C7
4.7μF
LTC3101
4.7μH
ENA1
ENA2
ENA3
V
OUT2
DISABLE ENABLE
SW2
FB2
1.8V
C9
10μF
C8
22pF
R3
221k
350mA
CRS
C1
R4
110k
0.22μF
4.7μH
V
OUT1
1.5V
SW1
FB1
C11
10μF
C10
22pF
R5
221k
350mA
R6
147k
GND
3101 TA03a
Power-Up Waveforms
RESET Timing During Power Up
ENABLE
5V/DIV
ENABLE
5V/DIV
C
RS
V
V
V
OUT3
2V/DIV
OUT2
OUT1
OUTPUT
VOLTAGES
1V/DIV
RESET 5V/DIV
V
2V/DIV
OUT1
HSO
2V/DIV
V
V
5V/DIV
5V/DIV
OUT2
OUT3
3101 TA03b
3101 TA03c
200μs/DIV
50ms/DIV
3101f
29
Linear [ Linear ]
