Datasheet

9
LTC3445
3445fa
Figure 1
17
14
BUCK REGULATOR
V
REF
SW
OSC ADJUST
3445 F01
FB
SW
15
3 10
RUN
PWR_EN
V
CC1
OR GND
V
CC1
OR GND
6
SDA
8
SCL
5
ADD7
9
ADD6
4
22
PGOOD
V
CC
V
CC
V
CC2
1
V
TRACK
2
V
BACKUP
V
BACKUP
FB
11
GND
21
LDO1 OUT
25
EXPOSED PAD
20
LD01FB
23
LDO2 OUT
24
LD02FB
18
V
CC
BATT
V
BACKUP
19
BATTFAULT
C1
C
IN1
V
CC
C21
C11
R3
R4
GND
SOFT-START
V
CC1
POWER FOR ALL EXCEPT
LDOs AND BUCK PFET
SLEW
CONTROL
V
OUT
CONTROL
STRAPPABLE
STRAPPABLE
BUCK/LDO
ENABLE
BURST
V
REF
DAC
0.6V
SPREAD
SPECTRUM
PowerPath
CONTROL
PowerPath
LDO
POWER
SWITCH
DRIVER
POWER
SWITCH
LDO1
V
CC1
V
CC1
L1
REF
POWER FOR LDOs
OUT
FB
POWER
GOOD
R1
R2
LDO2
REF OUT
FB
I
2
C
+
3V
COIN
CELL
FU CTIO AL DIAGRA S
U
U
W