Datasheet
LTC3851
2
3851fb
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
(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
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
UD PACKAGE
16-LEAD (3mm s 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
LTC3851EGN#PBF LTC3851EGN#TRPBF 3851 16-Lead Plastic SSOP –40°C to 85°C
LTC3851IGN#PBF LTC3851IGN#TRPBF 3851 16-Lead Plastic SSOP –40°C to 125°C
LTC3851EMSE#PBF LTC3851EMSE#TRPBF 3851 16-Lead Plastic MSOP –40°C to 85°C
LTC3851IMSE#PBF LTC3851IMSE#TRPBF 3851 16-Lead Plastic MSOP –40°C to 125°C
LTC3851EUD#PBF LTC3851EUD#TRPBF LCXN
16-Lead (3mm × 3mm) Plastic QFN
–40°C to 85°C
LTC3851IUD#PBF LTC3851IUD#TRPBF LCXN
16-Lead (3mm × 3mm) Plastic QFN
–40°C to 125°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/
I
TH
, V
FB
Voltages .......................................... 3V to –0.3V
INTV
CC
Peak Output Current ..................................50mA
Operating Temperature Range (Note 2)..–40°C to 125°C
Junction Temperature (Note 3) ............................. 125°C
Storage Temperature Range ...................–65°C to 150°C
Lead Temperature (Soldering, 10 sec)
GN/MSE ............................................................ 300°C