LTC3445_15 Datasheet, PDF (9/24 Pages) Linear Technology – I2C Controllable Buck Regulator with Two LDOs

W
FU CTIO AL DIAGRA S
V_CC
PWR_EN
V_CC1 OR GND
V_CC1 OR GND
RUN
15
SDA
6
SCL
8
ADD7
5
ADD6
9
I²C
STRAPPABLE
STRAPPABLE
V_CC
PGOOD
4
POWER
GOOD
BUCK/LDO
ENABLE
BURST
V_REF DAC
SLEW
CONTROL
V_OUT
CONTROL
0.6V
3
V_CC1
POWER FOR ALL EXCEPT
LDOs AND BUCK PFET
SOFT-START
SPREAD
SPECTRUM
C_IN1
10
V_CC1
BUCK REGULATOR
V_REF
SW
OSC ADJUST FB
GND
LTC3445
L1
SW
14
FB
17
C1
GND
11
V_CC2
V_CC 22
POWER FOR LDOs
LDO1
REF
OUT
FB
LDO2
REF
OUT
FB
V_CC1
EXPOSED PAD 25
LDO1 OUT
21
LD01FB
20
LDO2 OUT
23
LD02FB
24
R1
C11
R2
R3
C21
R4
V_TRACK
1
V_BACKUP
V_BACKUP
3V ₊
2
COIN
CELL
PowerPath
LDO
PowerPath
CONTROL
POWER
SWITCH
DRIVER
POWER
SWITCH
Figure 1
V_CC BATT
18
BATTFAULT
19
V_BACKUP
3445 F01
3445fa
9