Datasheet

LTC3375
32
3375fc
For more information www.linear.com/3375
Typical applicaTions
Figure 8. Buck Regulators with Sequenced Start-Up Driven from a High Voltage Upstream Buck Converter
LTC3375
EXPOSED PAD
PB
2.2µH
0.01µF
PUSH BUTTON
V
IN1
SW1
FB1
V
IN8
SW8
FB8
3375 F08
2.2µH
422k
649k
422k
649k
10µF
1.2V
1A
2.5V
1A
1.8V
1A
1.6V
1A
1.2V
1A
10µF
10µF
10µF 10µF
10µF
10µF
10µF
22µF 22µF
22µF
22µF
2.5V
1A
1.8V
1A
1.6V
1A
22µF
22µF
22µF
22µF
2.2µH
V
IN2
SW2
FB2
V
IN7
SW7
FB7
2.2µH
1.02M
412k
1.02M
412k
2.2µH
V
IN3
SW3
FB3
V
IN6
SW6
FB6
2.2µH
649k
432k
649k
432k
2.2µH
V
IN4
SW4
FB4
V
CC
SDA
SCL
C
T
402k
RT
KILL
SYNC
WDI
EN1
EN2
EN3
EN4
EN5
EN6
EN7
EN8
V
IN5
SW5
FB5
V
SHNT
V
CC
FBV
CC
IRQ
RST
WDO
TEMP
ON
MICROPROCESSOR
CONTROL
I
2
C
CONTROL
2.2µH
511k
422k
47k
215Ω
3.3V
5mA
1Ω
22µF
1.02M
576k
511k
422k
1µF
MICROPROCESSOR
CONTROL
HIGH VOLTAGE
5.5V TO 60V
FZT6928
0.1µF
C
IN
22µF
V
IN
5.5V TO 60V
INTV
CC
34.8k
470pF
100k
100k
MTOP, MBOT: Si7850DP
L1 COILCRAFT SER1360-802KL
C
OUT
: SANYO 10TPE330M
D1: DFLS1100
19.1k
2.2µF
D1
0.1µF
FREQ
ITH
SGND
SGND
LTC3891
V
IN
PGOOD
PLLIN/MODE
I
LIM
INTV
CC
PGND
L1
8µH
R
SENSE
7mΩ
BOOST
SW
BG
SENSE
+
SENSE
–
EXTV
CC
V
FB
TG
MTOP
MBOT
1nF
C
OUT
330µF
5V
6A
TRACK/SS
RUN