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LTC3856 Datasheet(PDF) 2 Page - Linear Technology

Part # LTC3856
Description  2-Phase Synchronous Step-Down DC/DC Controller with Diffamp
PDF  40 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3856 Datasheet(HTML) 2 Page - Linear Technology

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LTC3856

3856f
Input Supply Voltage (VIN)......................... 40V to –0.3V
Topside Driver Voltages (BOOSTn) ............ 46V to –0.3V
Switch Voltage (SWn)................................... 40V to –5V
INTVCC, RUN, PGOOD, EXTVCC,
(BOOSTn – SWn)......................................... 6V to –0.3V
SENSEn Voltages ...................................... 5.5V to –0.3V
MODE, PLLIN, ILIM, TK/SS, AVP,
FREQ, ISET Voltages............................. INTVCC to –0.3V
DIFFP, DIFFN, DIFFOUT, PHASMD,
ITEMP Voltages..................................... INTVCC to –0.3V
(Note 1)
absoluTe MaxiMuM raTings
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
FREQ
RUN
SENSE1+
SENSE1–
NC
TK/SS
VFB
ITH
SGND
AVP
ITEMP
PHASMD
SENSE2+
SENSE2–
DIFFP
DIFFN
DIFFOUT
ISET
ILIM
PLLIN
CLKOUT
SW1
TG1
NC
BOOST1
PGND1
BG1
VIN
INTVCC
EXTVCC
BG2
PGND2
NC
BOOST2
TG2
SW2
PGOOD
MODE
39
TJMAX = 125°C, θJA = 25°C/W
EXPOSED PAD (PIN 39) IS SGND/PGND, MUST BE SOLDERED TO PCB
32
33
31 30 29 28 27 26 25
9 10 11 12
TOP VIEW
UH PACKAGE
32-LEAD (5mm 5mm) PLASTIC QFN
13 14 15 16
17
18
19
20
21
22
23
24
8
7
6
5
4
3
2
1
TK/SS
VFB
ITH
AVP
ITEMP
PHASMD
SENSE2+
SENSE2–
BOOST1
BG1
VIN
INTVCC
EXTVCC
BG2
BOOST2
TG2
TJMAX = 125°C, θJA = 34°C/W
EXPOSED PAD (PIN 33) IS SGND/PGND, MUST BE SOLDERED TO PCB
pin conFiguraTion
ITH, VFB Voltages................................... INTVCC to –0.3V
INTVCC Peak Output Current ................................100mA
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



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