Datasheet

LTC3865/LTC3865-1
2
3865fb
Input Supply Voltage (V
IN
) ......................... –0.3V to 40V
Topside Driver Voltages
BOOST1, BOOST2 .................................. –0.3V to 46V
Switch Voltage (SW1, SW2) ......................... –5V to 40V
INTV
CC
, RUN1, RUN2, PGOOD(s), EXTV
CC
,
(BOOST1-SW1), (BOOST2-SW2) ................. –0.3V to 6V
SENSE1
+
, SENSE2
+
, SENSE1
–
, SENSE2
–
V
OSENSE1
, V
OSENSE2
Voltages .................... –0.3V to 5.8V
MODE/PLLIN, I
LIM
, TK/SS1, TK/SS2, VID11,
VID12, VID21, VID22, FREQ Voltages ... –0.3V to INTV
CC
(Note 1)
ABSOLUTE MAXIMUM RATINGS
LTC3865 LTC3865
32 31 30 29 28 27 26 25
9 10 11 12
TOP VIEW
33
SGND
UH PACKAGE
32-LEAD (5mm s 5mm) PLASTIC QFN
13 14 15 16
17
18
19
20
21
22
23
24
8
7
6
5
4
3
2
1V
OSENSE1
TK/SS1
I
TH1
VID11
VID12
I
TH2
TK/SS2
V
OSENSE2
BOOST1
BG1
V
IN
INTV
CC
EXTV
CC
BG2
PGND
BOOST2
SENSE1
–
SENSE1
+
RUN1 FREQ VID22 MODE/PLLIN SW1 TG1
SENSE2
–
SENSE2
+
RUN2
VID21
I
LIM
PGOOD
SW2
TG2
T
JMAX
= 125°C, θ
JA
= 34°C/W, θ
JC
= 3°C/W
EXPOSED PAD (PIN 33) IS SGND, MUST BE SOLDERED TO PCB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
TOP VIEW
FE PACKAGE
38-LEAD PLASTIC TSSOP
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
RUN1
SENSE1
+
SENSE
–
NC
V
OSENSE1
TK/SS1
I
TH1
SGND
VID11
VID12
I
TH2
TK/SS2
V
OSENSE2
NC
SENSE2
–
SENSE2
+
RUN2
VID21
I
LIM
FREQ
VID22
MODE/PLLIN
SW1
TG1
BOOST1
PGND1
BG1
V
IN
INTV
CC
EXTV
CC
BG2
PGND2
BOOST2
NC
TG2
SW2
PGOOD1
PGOOD2
39
SGND
T
JMAX
= 125°C, θ
JA
= 25°C/W
EXPOSED PAD (PIN 39) IS SGND, MUST BE SOLDERED TO PCB
PIN CONFIGURATION
I
TH1
, I
TH2
Voltages .................................... –0.3V to 2.7V
INTV
CC
DC Output Current (Note 9) .......................80mA
Operating Junction Temperature Range (Notes 2, 3)
LTC3865/LTC3865-1 .......................... –40°C to 125°C
Storage Temperature Range ................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec)
FE Package ....................................................... 300°C