Datasheet
LT3990
2
3990f
V
IN
, EN/UVLO Voltage ...............................................62V
BOOST Pin Voltage ...................................................75V
BOOST Pin Above SW Pin .........................................30V
FB, RT Voltage.............................................................6V
PG, BD Voltage .........................................................30V
(Note 1)
orDer inFormaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3990EDD#PBF LT3990EDD#TRPBF LFWJ
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LT3990IDD#PBF LT3990IDD#TRPBF LFWJ
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
LT3990EMSE#PBF LT3990EMSE#TRPBF 3990 16-Lead Plastic MSOP –40°C to 125°C
LT3990IMSE#PBF LT3990IMSE#TRPBF 3990 16-Lead Plastic MSOP –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/
absoluTe maximum raTings
TOP VIEW
11
GND
DD PACKAGE
10-LEAD (3mm s 3mm) PLASTIC DFN
10
9
6
7
8
4
5
3
2
1
RT
PG
BD
BOOST
SW
FB
EN/UVLO
V
IN
GND
GND
θ
JA
= 45°C/W, θ
JC
= 10°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
1
2
3
4
5
6
7
8
FB
FB
NC
EN/UVLO
NC
V
IN
NC
GND
16
15
14
13
12
11
10
9
RT
NC
PG
BD
NC
BOOST
NC
SW
TOP VIEW
17
GND
MSE PACKAGE
16-LEAD PLASTIC MSOP
θ
JA
= 40°C/W, θ
JC
= 10°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
pin conFiguraTion
Operating Junction Temperature Range (Note 2)
LT3990E ............................................. –40°C to 125°C
LT3990I
.............................................. –40°C to 125°C
Storage Temperature Range ................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
MS Only ............................................................ 300°C