Datasheet

LT3973/LT3973-3.3/LT3973-5
2
3973fa
V
IN
, EN/UVLO Voltage ...............................................42V
BOOST Pin Voltage ...................................................55V
BOOST Pin Above SW Pin .........................................25V
FB/V
OUT
, RT, PG Voltage .............................................. 6V
BD Voltage ................................................................25V
OUT Voltage ..............................................................14V
(Note 1)
orDer inFormaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3973EDD#PBF LT3973EDD#TRPBF LGCH 10-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C
LT3973IDD#PBF LT3973IDD#TRPBF LGCH 10-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C
LT3973HDD#PBF LT3973HDD#TRPBF LGCH 10-Lead (3mm × 3mm) Plastic DFN –40°C to 150°C
LT3973EMS#PBF LT3973EMSE#TRPBF LTFYS 10-Lead Plastic MSOP –40°C to 125°C
LT3973IMS#PBF LT3973IMSE#TRPBF LTFYS 10-Lead Plastic MSOP –40°C to 125°C
LT3973HMS#PBF LT3973HMS#TRPBF LTFYS 10-Lead Plastic MSOP –40°C to 150°C
LT3973EMSE-3.3#PBF LT3973EMSE-3.3#TRPBF LTGGB 10-Lead Plastic MSOP –40°C to 125°C
LT3973IMSE-3.3#PBF LT3973IMSE-3.3#TRPBF LTGGB 10-Lead Plastic MSOP –40°C to 125°C
LT3973HMSE-3.3#PBF LT3973HMSE-3.3#TRPBF LTGGB 10-Lead Plastic MSOP –40°C to 150°C
LT3973EDD-3.3#PBF LT3973EDD-3.3#TRPBF LGGC 10-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C
LT3973IDD-3.3#PBF LT3973IDD-3.3#TRPBF LGGC 10-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C
LT3973HDD-3.3#PBF LT3973HDD-3.3#TRPBF LGGC 10-Lead (3mm × 3mm) Plastic DFN –40°C to 150°C
LT3973EMSE-5#PBF LT3973EMSE-5#TRPBF LTGGD 10-Lead Plastic MSOP –40°C to 125°C
LT3973IMSE-5#PBF LT3973IMSE-5#TRPBF LTGGD 10-Lead Plastic MSOP –40°C to 125°C
LT3973HMSE-5#PBF LT3973HMSE-5#TRPBF LTGGD 10-Lead Plastic MSOP –40°C to 150°C
absoluTe maximum raTings
TOP VIEW
11
GND
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
10
9
6
7
8
4
5
3
2
1
RT
PG
BD
BOOST
SW
*FB/V
OUT
OUT
EN/UVLO
V
IN
GND
θ
JA
= 40°C/W, θ
JC
= 5°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
1
2
3
4
5
*FB/V
OUT
OUT
EN/UVLO
V
IN
GND
10
9
8
7
6
RT
PG
BD
BOOST
SW
TOP VIEW
MS PACKAGE
10-LEAD PLASTIC MSOP
11
GND
θ
JA
= 45°C/W, θ
JC
= 10°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
* FB for LT3973, V
OUT
for LT3973-3.3, LT3973-5.
pin conFiguraTion
Operating Junction Temperature Range (Note 2)
LT3973E/LT3973E-X ........................... –40°C to 125°C
LT3973I/LT3973I-X ............................ –40°C to 125°C
LT3973H/LT3973H-X .......................... –40°C to 150°C
Storage Temperature Range ................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
MS Only ............................................................ 300°C