Datasheet
LT3971/LT3971-3.3/LT3971-5
2
3971fd
ABSOLUTE MAXIMUM RATINGS
V
IN
, EN Voltage .........................................................38V
BOOST Pin Voltage
...................................................55V
BOOST Pin Above SW Pin
......................................... 30V
FB, V
OUT
, RT, SYNC, SS Voltage .................................6V
PG, BD Voltage
.........................................................30V
Boost Diode Current
....................................................1A
(Note 1)
PIN CONFIGURATION
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3971EDD#PBF LT3971EDD#TRPBF LFJF
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LT3971IDD#PBF LT3971IDD#TRPBF LFJF
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LT3971EMSE#PBF LT3971EMSE#TRPBF LTFJG 10-Lead Plastic MSOP –40°C to 125°C
LT3971IMSE#PBF LT3971IMSE#TRPBF LTFJG 10-Lead Plastic MSOP –40°C to 125°C
LT3971EMSE16#PBF LT3971EMSE16#TRPBF 3971 16-Lead Plastic MSOP –40°C to 125°C
LT3971IMSE16#PBF LT3971IMSE16#TRPBF 3971 16-Lead Plastic MSOP –40°C to 125°C
LT3971EDD-3.3#PBF LT3971EDD-3.3#TRPBF LFRM
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LT3971IDD-3.3#PBF LT3971IDD-3.3#TRPBF LFRM
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LT3971EMSE-3.3#PBF LT3971EMSE-3.3#TRPBF LTFRN 10-Lead Plastic MSOP –40°C to 125°C
LT3971IMSE-3.3#PBF LT3971IMSE-3.3#TRPBF LTFRN 10-Lead Plastic MSOP –40°C to 125°C
Operating Junction Temperature Range (Note 2)
LT3971E
............................................. –40°C to 125°C
LT3971I
.............................................. –40°C to 125°C
Storage Temperature Range
.............. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
(MSE Only)
.......................................................300°C
LT3971 LT3971 LT3971
TOP VIEW
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
10
11
GND
9
6
7
8
4
5
3
2
1
SYNC
PG
RT
SS
FB
BD
BOOST
SW
V
IN
EN
θ
JA
= 45°C, θ
JC
= 10°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
1
2
3
4
5
BD
BOOST
SW
V
IN
EN
10
9
8
7
6
11
GND
SYNC
PG
RT
SS
FB
TOP VIEW
MSE PACKAGE
10-LEAD PLASTIC MSOP
θ
JA
= 45°C, θ
JC
= 10°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
1
2
3
4
5
6
7
8
BD
NC
BOOST
NC
SW
NC
V
IN
EN
16
15
14
13
12
11
10
9
GND
SYNC
PG
RT
SS
NC
FB
FB
TOP VIEW
17
GND
MSE PACKAGE
16-LEAD PLASTIC MSOP
θ
JA
= 40°C
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
LT3971-3.3, LT3971-5 LT3971-3.3, LT3971-5
TOP VIEW
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
10
11
GND
9
6
7
8
4
5
3
2
1
SYNC
PG
RT
SS
V
OUT
BD
BOOST
SW
V
IN
EN
θ
JA
= 45°C, θ
JC
= 10°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
1
2
3
4
5
BD
BOOST
SW
V
IN
EN
10
9
8
7
6
11
GND
SYNC
PG
RT
SS
V
OUT
TOP VIEW
MSE PACKAGE
10-LEAD PLASTIC MSOP
θ
JA
= 45°C, θ
JC
= 10°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB