LTC3649
ABSOLUTE MAXIMUM RATINGS (Notes 1, 2)
V Voltage (Note 3).................................. 64V to –0.3V
IMON, PGOOD Voltage................................. 4V to –0.3V
INREG
Operating Junction
Temperature Range (Notes 5, 7)............ –40°C to 125°C
Storage Temperature Range .................. –65°C to 125°C
IN
ISET, OUT Voltage..................................... 64V to –0.3V
RUN Voltage............................................... 64V to –0.3V
MODE/SYNC Voltage .................................. 6V to –0.3V
V
, ITH Voltage ..................................... 4V to –0.3V
PGDFB, R
INTV +0.3V to –0.3V
T...........................................
EXTV Voltage ......................................... 2ꢀV to –0.3V
CC
CC
PIN CONFIGURATION
TOP VIEW
TOP VIEW
1
2
SW
28
27
26
25
24
23
22
21
20
19
18
17
16
15
PGND
PGND
PGND
PGND
PGND
SW
3
SW
28 27 26 25 24 23
4
SW
PGND
PGND
1
2
3
4
5
6
7
8
22
21
20
19
18
17
16
15
SW
5
SW
SW
6
SW
V
V
IN
SW
IN
V
SW
7
SW
V
29
SGND
IN
IN
29
SGND
RUN
SGND
BOOST
8
BOOST
RUN
SGND
INTV
CC
9
INTV
CC
MODE/SYNC
PGOOD
EXTV
ITH
CC
10
11
12
13
14
EXTV
CC
MODE/SYNC
PGOOD
ITH
9
10 11 12 13 14
UFD PACKAGE
ISET
PGDFB
V
IMON
OUT
R
T
V
INREG
28-LEAD (4mm × 5mm) PLASTIC QFN
FE PACKAGE
T
= 125°C, θ = 43°C/W, θ = 3.4°C/W
JMAX
JA
JC
28-LEAD PLASTIC TSSOP
EXPOSED PAD (PIN 29) IS SGND, MUST BE SOLDERED TO PCB
T
= 125°C, θ = 30°C/W, θ = 5°C to 10°C/W
JA JC
EXPOSED PAD (PIN 29) IS SGND, MUST BE SOLDERED TO PCB
JMAX
http://www.linear.com/product/LTC3649#orderinfo
ORDER INFORMATION
LEAD FREE FINISH
LTC3649EUFD#PBF
LTC3649IUFD#PBF
LTC3649EFE#PBF
LTC3649IFE#PBF
TAPE AND REEL
PART MARKING*
3649
PACKAGE DESCRIPTION
2ꢀ-Lead (4mm × 5mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 125°C
LTC3649EUFD#TRPBF
LTC3649IUFD#TRPBF
LTC3649EFE#TRPBF
LTC3649IFE#TRPBF
3649
2ꢀ-Lead (4mm × 5mm) Plastic QFN
2ꢀ-Lead Plastic TSSOP
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
LTC3649
LTC3649
2ꢀ-Lead Plastic TSSOP
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
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/. Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
3649fb
2
For more information www.linear.com/LTC3649
Linear [ Linear ]
