LTC3856 LINER [Linear Technology], LTC3856 Datasheet - Page 2

• Manufacturer Part Number: LTC3856
• Description: 2-Phase Synchronous Step-Down DC/DC Controller with Diffamp
• Manufacturer: LINER [Linear Technology]

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LTC3856
Input Supply Voltage (V
Topside Driver Voltages (BOOSTn) ............ 46V to –0.3V
Switch Voltage (SWn) ................................... 40V to –5V
INTV
(BOOSTn – SWn) ......................................... 6V to –0.3V
SENSEn Voltages ...................................... 5.5V to –0.3V
MODE, PLLIN, ILIM, TK/SS, AVP ,
FREQ, ISET Voltages ............................. INTV
DIFFP , DIFFN, DIFFOUT, PHASMD,
ITEMP Voltages ..................................... INTV
pin conFiguraTion

CC
, RUN, PGOOD, EXTV
EXPOSED PAD (PIN 39) IS SGND/PGND, MUST BE SOLDERED TO PCB
PHASMD
SENSE2–
SENSE1
SENSE1
SENSE2
DIFFOUT
ITEMP
TK/SS
SGND
DIFFP
DIFFN
FREQ
RUN
ISET
ILIM
AVP
V
I
NC
TH
FB
+
–
+
T
JMAX
38-LEAD PLASTIC TSSOP
10
11
12
13
14
15
16
17
18
19
1
2
3
4
5
6
7
8
9
IN
= 125°C, θ
) ......................... 40V to –0.3V
FE PACKAGE
TOP VIEW
CC
39
JA
,
= 25°C/W
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
PLLIN
CLKOUT
SW1
TG1
NC
BOOST1
PGND1
BG1
V
INTV
EXTV
BG2
PGND2
NC
BOOST2
TG2
SW2
PGOOD
MODE
IN
CC
CC
CC
CC
to –0.3V
to –0.3V
(Note 1)
I
INTV
Operating Junction Temperature Range
(Notes 2, 3) ............................................ –40°C to 125°C
Storage Temperature Range ................... –65°C to 125°C
Reflow Peak Body Temperature (UH Package) ...... 260°C
Lead Temperature (Soldering, 10 sec.)
FE Package ............................................................ 300°C
TH
, V
CC
FB
EXPOSED PAD (PIN 33) IS SGND/PGND, MUST BE SOLDERED TO PCB
PHASMD
SENSE2
SENSE2
Peak Output Current ................................100mA
Voltages ................................... INTV
ITEMP
TK/SS
AVP
V
I
TH
FB
+
–
1
2
3
4
5
6
7
8
32-LEAD (5mm 5mm) PLASTIC QFN
32
9 10 11 12
T
JMAX
31 30 29 28 27 26 25
= 125°C, θ
UH PACKAGE
TOP VIEW
33
13 14 15 16
JA
= 34°C/W
24
23
22
21
20
19
18
17
BOOST1
BG1
V
INTV
EXTV
BG2
BOOST2
TG2
IN
CC
CC
CC
to –0.3V
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