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LTC3875
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Supply Voltage (V
IN
Topside Driver Voltages
(BOOST1, BOOST2).................................... 46V to –0.3V
Switch Voltage (SW1, SW2) .......................... 40V to –5V
INTV
, RUN(s), PGOOD, EXTV
CC
(BOOST-SW1), (BOOST2-SW2).................... 6V to –0.3V
+
+
SNSA
(s), SNSD
(s),
–
SNS
(s) Voltages .................................. INTV
PIN CONFIGURATION
40
39
38 37 36 35 34 33 32 31
TK/SS1
1
+
V
2
OSNS1
–
V
3
OSNS1
I
4
TH1
I
5
TH2
+
SGND/PGND
V
6
OSNS2
–
V
7
OSNS2
TK/SS2
8
+
SNSA2
9
–
SNS2
10
11
12 13 14 15
UJ PACKAGE
40-LEAD (6mm × 6mm) PLASTIC QFN
T
= 125°C, θ
JMAX
EXPOSED PAD (PIN 41) IS SGND/PGND, MUST BE SOLDERED TO PCB
2
) ......................... 40V to –0.3V
CC
to –0.3V
CC
TOP VIEW
30
SW1
29
TG1
28
BOOST1
27
BG1
26
V
41
IN
25
INTV
CC
24
EXTV
CC
23
BG2
22
BOOST2
21
TG2
16 17 18 19
20
= 33°C/W, θ
= 2.0°C/W
JA
JC
For more information
MODE/PLLIN, ILIM, FREQ, IFAST, ENTMPB
+
–
V
, V
Voltages ............... INTV
OSNS(s)
OSNS(s)
I
, I
, PHASMD, TRSET1, TRSET2,
TH1
TH2
TCOMP1, TCOMP2, TAVG Voltages ....... INTV
INTV
Peak Output Current ................................100mA
CC
Operating Junction Temperature Range
(Notes 2, 3) ............................................ –40°C to 125°C
Storage Temperature Range .................. –65°C to 125°C
40
39
38 37 36 35 34 33 32 31
TK/SS1
1
+
V
2
OSNS1
–
V
3
OSNS1
I
4
TH1
I
5
TH2
+
V
6
OSNS2
–
V
7
OSNS2
TK/SS2
8
+
SNSA2
9
–
SNS2
10
11
12 13 14 15
40-LEAD (5mm × 5mm) PLASTIC QFN
T
= 125°C, θ
JMAX
EXPOSED PAD (PIN 41) IS SGND/PGND, MUST BE SOLDERED TO PCB
www.linear.com/LTC3875
to –0.3V
CC
to –0.3V
CC
TOP VIEW
30
SW1
29
TG1
28
BOOST1
27
BG1
26
V
41
IN
SGND/PGND
25
INTV
CC
24
EXTV
CC
23
BG2
22
BOOST2
21
TG2
16 17 18 19
20
UH PACKAGE
= 44°C/W, θ
= 7.3°C/W
JA
JC
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