LTC3101
BLOCK DIAGRAM
14
16
15
SW3A
20
SW3B
17
BAT2* USB2*
OUT3
WELL
CONTROL
MAX
CONTROL
AND
D
HSO
18
CURRENT
LIMIT
A
MAX
11
B
C
Hot Swap
CONTROL
A´
ALWAYS-ON
LDO
CONTROL
LDO
10
3
BAT1*
USB1*
FB3
7
BUCK-BOOST
CONTROL
4
ENA3
19
4M
V
CC
WELL
CONTROL
400k
PWRKEY
PBSTAT
24ms
DEGLITCH
SW1
8
9
1.27MHz
OSCILLATOR
2
PUSHBUTTON
CONTROL
LOGIC
BANDGAP
BUCK 1
CONTROL
REFERENCE
PWM
OVERTEMPERATURE
SHUTDOWN AND
UNDERVOLTAGE
LOCKOUT
1
6
FB1
PWRON
23
21
ENA1
4M
4M
RESET
WELL
CONTROL
13
12
1μA
1.20V
+
–
SW2
5
C
RS
DISABLED
FB1 POWER BAD (IF ENABLED)
FB2 POWER BAD (IF ENABLED)
FB3 POWER BAD (IF ENABLED)
UNDERVOLTAGE FAULT
BUCK 2
CONTROL
4M
ENA2
FB2
OVERTEMPERATURE FAULT
24
22
GND
(EXPOSED PAD)
25
3101 BD
*BAT1 AND BAT2 MUST BE CONNECTED TOGETHER IN THE APPLICATION
USB1 AND USB2 MUST BE CONNECTED TOGETHER IN THE APPLICATION
3101f
12
Linear [ Linear ]
