Datasheet
LTC3634
2
3634fb
For more information www.linear.com/LTC3634
absoluTe MaxiMuM raTings
V
IN1
, V
IN2
................................................... –0.3V to 16V
V
IN1
, V
IN2
Transient (Note 2) .......................... ............18V
PGOOD1, PGOOD2, V
ON1
, V
ON2
................. –0.3V to 16V
VTTR, INTV
CC
, TRACKSS, VDDQIN .......... –0.3V to 3.6V
ITH1, ITH2, RT, MODE/SYNC .....–0.3V to INTV
CC
+ 0.3V
V
FB1
, V
FB2
, PHMODE .................. –0.3V to INTV
CC
+ 0.3V
BOOST1-SW1, BOOST2-SW2 .................... –0.3V to 3.6V
BOOST1, BOOST2 ....................................–0.3V to 19.6V
RUN1, RUN2 .................................... –0.3V to V
IN
+ 0.3V
9 10
TOP VIEW
29
PGND
UFD PACKAGE
28-LEAD (4mm × 5mm) PLASTIC QFN
11 12 13
28 27 26 25 24
14
23
6
5
4
3
2
1
PGOOD1
PHMODE
RUN1
MODE/SYNC
RT
RUN2
SGND
PGOOD2
V
IN1
V
IN1
BOOST1
INTV
CC
VTTR
BOOST2
V
IN2
V
IN2
V
FB1
TRACKSS
ITH1
V
ON1
SW1
SW1
V
FB2
VDDQIN
ITH2
V
ON2
SW2
SW2
7
17
18
19
20
21
22
16
8
15
T
JMAX
= 150°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 29) IS PGND, MUST BE SOLDERED TO PCB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
FE PACKAGE
28-LEAD PLASTIC TSSOP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
ITH1
TRACKSS
V
FB1
PGOOD1
PHMODE
RUN1
MODE/SYNC
RT
RUN2
SGND
PGOOD2
V
FB2
VDDQIN
ITH2
V
ON1
SW1
SW1
V
IN1
V
IN1
BOOST1
INTV
CC
VTTR
BOOST2
V
IN2
V
IN2
SW2
SW2
V
ON2
29
PGND
T
JMAX
= 150°C, θ
JA
= 25°C/W
EXPOSED PAD (PIN 29) IS PGND, MUST BE SOLDERED TO PCB
pin conFiguraTion
SW Source and Sink Current (DC) (Note 3) ................3A
Operating Junction Temperature Range (Notes 4, 5, 8)
LTC3634E, LTC3634I
......................... –40°C to 125°C
LTC3634H
.......................................... –40°C to 150°C
LTC3634MP
....................................... –55°C to 150°C
Storage Temperature Range ..................–65°C to 150°C
Lead Temperature
(Soldering, 10 sec, TSSOP Package) .....................260°C
(Note 1)