LTC3856_15 Datasheet, PDF (2/40 Pages) Linear Technology – 2-Phase Synchronous Step-Down DC/DC Controller with Diffamp

LTC3856
Absolute Maximum Ratings (Note 1)
Input Supply Voltage (V_IN).......................... 40V to –0.3V
Topside Driver Voltages (BOOSTn)............. 46V to –0.3V
Switch Voltage (SWn)................................... 40V to –5V
INTV_CC, RUN, PGOOD, EXTV_CC,
(BOOSTn – SWn).......................................... 6V to –0.3V
SENSEn Voltages....................................... 5.5V to –0.3V
MODE, PLLIN, ILIM, TK/SS, AVP,
FREQ, ISET Voltages.............................. INTV_CC to –0.3V
DIFFP, DIFFN, DIFFOUT, PHASMD,
ITEMP Voltages..................................... INTV_CC to –0.3V
I_TH, V_FB Voltages.................................... INTV_CC to –0.3V
INTV_CC 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
Pin Configuration
FREQ 1
RUN 2
SENSE1⁺ 3
SENSE1^– 4
NC 5
TK/SS 6
V_FB 7
I_TH 8
SGND 9
AVP 10
ITEMP 11
PHASMD 12
SENSE2⁺ 13
SENSE2– 14
DIFFP 15
DIFFN 16
DIFFOUT 17
ISET 18
ILIM 19
TOP VIEW
39
38 PLLIN
37 CLKOUT
36 SW1
35 TG1
34 NC
33 BOOST1
32 PGND1
31 BG1
30 V_IN
29 INTV_CC
28 EXTV_CC
27 BG2
26 PGND2
25 NC
24 BOOST2
23 TG2
22 SW2
21 PGOOD
20 MODE
FE PACKAGE
38-LEAD PLASTIC TSSOP
T_JMAX = 125°C, θ_JA = 25°C/W
EXPOSED PAD (PIN 39) IS SGND/PGND, MUST BE SOLDERED TO PCB
TOP VIEW
32 31 30 29 28 27 26 25
TK/SS 1
24 BOOST1
V_FB 2
I_TH 3
AVP 4
ITEMP 5
PHASMD 6
SENSE2⁺ 7
SENSE2^– 8
23 BG1
22 V_IN
33
21 INTV_CC
20 EXTV_CC
19 BG2
18 BOOST2
17 TG2
9 10 11 12 13 14 15 16
UH PACKAGE
32-LEAD (5mm s 5mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 34°C/W
EXPOSED PAD (PIN 33) IS SGND/PGND, MUST BE SOLDERED TO PCB
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