Datasheet

LTC3101
30
3101fb
TYPICAL APPLICATIONS
Li-Ion/USB-Powered Six Output Power Supply with Pushbutton Control
Buck-Boost Effi ciency
vs Load Current
Buck Converter 1 Effi ciency
vs Load Current
Buck Converter 2 Effi ciency
vs Load Current
BAT1
USB1
C
RS
PWRKEY
PWRON
PWM
PBSTAT
L1, L2: WURTH 744031004
L3: TAIYO YUDEN NR4018T4R7M
R1
50k
R2
50k
RESET
USB2
FB3
LDO
SW2
FB2
HSO
MAX
ENA3
ENA2
ENA1
C2
10μF
C3
10μF
Li-Ion
1.8V TO 4.2V
USB POWER
4.3V TO 5.5V
C4
10μF
R3
1M
V
OUT3
= 3.3V
300mA FOR V
IN
≥ 1.8V
800mA FOR V
IN
≥ 3V
R4
221k
L3
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
1.2V
350mA
V
OUT1
0.8V
350mA
C9
10μF
R5
221k
R6
221k
L2
4.7μH
SW1
FB1
C11
22μF
C10
22pF
C8
22pF
3101 TA04a
R7
221k
R8
649k
L1
4.7μH
C1
0.22μF
ON/OFF
BAT2 SW3A
LTC3101
GND
SW3B OUT3
μP
V
OUT2
+
LOAD CURRENT (mA)
1
0
EFFICIENCY (%)
20
30
40
50
60
70
10
100
3101 TA04b
80
90
100
10
1000
Burst Mode
OPERATION
PWM MODE
V
BAT
= 3.0V
V
BAT
= 4.2V
LOAD CURRENT (mA)
1
0
EFFICIENCY (%)
20
30
40
50
60
70
10
100
3101 TA02c
80
90
100
10
1000
Burst Mode
OPERATION
PWM MODE
V
BAT
= 3.0V
V
BAT
= 4.2V
LOAD CURRENT (mA)
1
0
EFFICIENCY (%)
20
30
40
50
60
70
10
100
3101 TA04d
80
90
100
10
1000
Burst Mode
OPERATION
PWM MODE
V
BAT
= 3.0V
V
BAT
= 4.2V