Datasheet
LTC3851A
2
3851afa
absoluTe MaxiMuM raTings
Input Supply Voltage (V
IN
) ......................... 40V to –0.3V
Topside Driver Voltage (BOOST) ................ 46V to –0.3V
Switch Voltage (SW) ..................................... 40V to –5V
INTV
CC
, (BOOST – SW), RUN ...................... 6V to –0.3V
TK/SS, I
LIM
...........................................INTV
CC
to –0.3V
SENSE
+
, SENSE
–
.......................................... 6V to –0.3V
MODE/PLLIN, FREQ/PLLFLTR ..............INTV
CC
to –0.3V
I
TH
, V
FB
Voltages .......................................... 3V to –0.3V
(Note 1)
GN PACKAGE
16-LEAD PLASTIC SSOP NARROW
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
MODE/PLLIN
FREQ/PLLFLTR
RUN
TK/SS
I
TH
FB
SENSE
–
SENSE
+
SW
TG
BOOST
V
IN
INTV
CC
BG
GND
I
LIM
T
JMAX
= 125°C, θ
JA
= 110°C/W
1
2
3
4
5
6
7
8
MODE/PLLIN
FREQ/PLLFLTR
RUN
TK/SS
I
TH
FB
SENSE
–
SENSE
+
16
15
14
13
12
11
10
9
SW
TG
BOOST
V
IN
INTV
CC
BG
GND
I
LIM
TOP VIEW
MSE PACKAGE
16-LEAD PLASTIC MSOP
17
GND
T
JMAX
= 125°C, θ
JA
= 35°C/W TO 40°C/W
EXPOSED PAD (PIN 17) IS GND,
MUST BE SOLDERED TO PCB
16 15 14 13
5 6 7 8
TOP VIEW
17
GND
UD PACKAGE
16-LEAD (3mm × 3mm) PLASTIC QFN
9
10
11
12
4
3
2
1RUN
TK/SS
I
TH
FB
BOOST
V
IN
INTV
CC
BG
FREQ/PLLFLTR
MODE/PLLIN
SW
TG
SENSE
–
SENSE
+
I
LIM
GND
T
JMAX
= 125°C, θ
JA
= 68°C/W, θ
JC
= 4.2°C/W
EXPOSED PAD (PIN 17) IS GND,
MUST BE SOLDERED TO PCB
pin conFiguraTion
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3851AEGN#PBF LTC3851AEGN#TRPBF 3851A 16-Lead Plastic SSOP –40°C to 125°C
LTC3851AIGN#PBF LTC3851AIGN#TRPBF 3851A 16-Lead Plastic SSOP –40°C to 125°C
LTC3851AEMSE#PBF LTC3851AEMSE#TRPBF 3851A 16-Lead Plastic MSOP –40°C to 125°C
LTC3851AIMSE#PBF LTC3851AIMSE#TRPBF 3851A 16-Lead Plastic MSOP –40°C to 125°C
LTC3851AHMSE#PBF LTC3851AHMSE#TRPBF 3851A 16-Lead Plastic MSOP –40°C to 150°C
LTC3851AMPMSE#PBF LTC3851AMPMSE#TRPBF 3851A 16-Lead Plastic MSOP –55°C to 150°C
LTC3851AEUD#PBF LTC3851AEUD#TRPBF LFPZ
16-Lead (3mm × 3mm) Plastic QFN
–40°C to 125°C
LTC3851AIUD#PBF LTC3851AIUD#TRPBF LFPZ
16-Lead (3mm × 3mm) Plastic QFN
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
INTV
CC
Peak Output Current ..................................50mA
Operating Junction Temperature Range (Notes 2, 3)
E-Grade, I-Grade ................................ –40°C to 125°C
H-Grade ............................................. –40°C to 150°C
MP-Grade .......................................... –55°C to 150°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
GN/MSE ............................................................300°C