Datasheet
2
LT3437
3437fc
The ● denotes the specifications which apply over the –40°C to 125°C
temperature range, otherwise specifications are at T
J
= 25°C. V
IN
= 12V, SHDN = 12V, BIAS = 5V, FB = 1.25V, C
SS
/SYNC = 0V unless
otherwise noted.
LT3437EFE
LT3437IFE
LT3437HFE
ORDER PART NUMBER
LT3437EDD
LT3437IDD
Consult LTC Marketing for parts specified with wider operating temperature ranges.
DD PART MARKING
ORDER PART NUMBER FE PART MARKING
Order Options
Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
V
IN
, SHDN, BIAS, SW Operating ............................. 60V
V
IN
, SHDN 100ms Transient, <15% Duty Cycle ....... 80V
BOOST Pin Above SW ............................................ 35V
BOOST Pin Voltage Operating................................. 75V
BOOST Pin 100ms Transient, <15% Duty Cycle ...... 85V
SYNC, C
SS
, FB .......................................................... 6V
θ
JA
= 45°C/W, θ
JC(PAD)
= 10°C/W
EXPOSED PAD IS GND (PIN 11)
MUST BE SOLDERED TO GND (PIN 4)
Operating Junction Temperature Range
LT3437EDD (Note 2) ....................... –40°C to 125°C
LT3437IDD (Note 2) ........................ –40°C to 125°C
LT3437EFE (Note 2) ........................ – 40°C to 125°C
LT3437IFE (Note 2) ......................... –40°C to 125°C
LT3437HFE (Note 2) .......................... –40°C to 140°C
Storage Temperature Range ................. – 65°C to 125°C
DD Package ....................................... –65°C to 125°C
FE Package ........................................ –65°C to 150°C
FE PACKAGE
16-LEAD PLASTIC TSSOP
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
NC
SW
NC
V
IN
NC
BOOST
NC
GND
NC
SHDN
SYNC
NC
FB
V
C
BIAS
C
SS
17
θ
JA
= 45°C/W, θ
JC(PAD)
= 10°C/W
EXPOSED PAD IS GND (PIN 17)
MUST BE SOLDERED TO GND (PIN 8)
3437EFE
3437IFE
3437HFE
LBDJ
LBDK
(Note 1)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
SHDN
SHDN Threshold ● 1.15 1.3 1.45 V
I
SHDN
SHDN Input Current SHDN = 12V ● 530 µA
Minimum Input Voltage (Note 3) ● 2.5 3 V
I
VINS
Supply Shutdown Current SHDN = 0V, BOOST = 0V, FB/PGFB = 0V, BIAS = 0V 0.1 2 µA
Supply Sleep Current (Note 4) BIAS = 0V, FB = 1.35V ● 150 300 µA
FB = 1.35V ● 45 75 µA
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
ELECTRICAL CHARACTERISTICS
TOP VIEW
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
10
9
6
7
8
4
5
3
2
1
SHDN
SYNC
FB
V
C
BIAS
SW
V
IN
BOOST
GND
C
SS
11