Datasheet

LTC3101
29
3101fb
TYPICAL APPLICATIONS
Manual Enable with Simultaneous Start-Up
Power-Up Waveforms
BAT1
USB1
USB2
ENA1
ENA2
ENA3
FB3
LDO
SW2
FB2CRS
DISABLE ENABLE
HSO
MAX
PWM
PWRON
C2
10μF
C1
0.22μF
C3
10μF
2 AA
CELLS
USB POWER
4.3V TO 5.5V
C4
10μF
R1
1M
V
OUT3
= 3.3V
300mA FOR V
IN
≥ 1.8V
800mA FOR V
IN
≥ 3V
R2
221k
4.7μH
TRACKING OUTPUT
200mA
Hot Swap OUTPUT
3.3V
100mA
C5
4.7μF
C6
4.7μF
C7
4.7μF
1.8V
50mA
V
OUT2
1.8V
350mA
V
OUT1
1.5V
350mA
C9
10μF
R3
221k
R4
110k
4.7μH
SW1
FB1
C11
10μF
C10
22pF
C8
22pF
3101 TA03a
R5
221k
R6
147k
4.7μH
BAT2 SW3A
LTC3101
GND
SW3B OUT3
+
ENABLE
5V/DIV
OUTPUT
VOLTAGES
1V/DIV
HSO
2V/DIV
200μs/DIV
3101 TA03b
V
OUT3
V
OUT2
V
OUT1
RESET Timing During Power Up
ENABLE
5V/DIV
V
OUT1
2V/DIV
RESET 5V/DIV
V
OUT2
5V/DIV
V
OUT3
5V/DIV
C
RS
2V/DIV
50ms/DIV
3101 TA03c