Datasheet

2
LT1374
1374fd
S8 PART MARKING
Input Voltage
LT1374 ............................................................... 25V
LT1374HV .......................................................... 32V
BOOST Pin Voltage ................................................. 38V
BOOST Pin Above Input Voltage ............................. 15V
SHDN Pin Voltage ..................................................... 7V
BIAS Pin Voltage ...................................................... 7V
FB Pin Voltage (Adjustable Part) ............................ 3.5V
FB Pin Current (Adjustable Part) ............................ 1mA
SENSE Voltage (Fixed 5V Part) ................................. 7V
SYNC Pin Voltage ..................................................... 7V
Operating Junction Temperature Range
LT1374C ............................................... 0°C to 125° C
LT1374I ........................................... – 40°C to 125°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
R PACKAGE
7-LEAD PLASTIC DD
FRONT VIEW
TAB
IS
GND
FB OR SENSE*
BOOST
V
IN
GND
V
SW
SYNC OR SHDN*
V
C
7
6
5
4
3
2
1
1
2
3
4
8
7
6
5
TOP VIEW
S8 PACKAGE
8-LEAD PLASTIC SO
V
IN
BOOST
FGND
V
SW
V
C
BIAS
SYNC
OR SHDN*
FB OR
SENSE*
θ
JA
=80°C/ W WITH FUSED (FGND)
GROUND PIN CONNECTED TO GROUND
PLANE OR LARGE LANDS
LT1374CS8
LT1374CS8-5
LT1374CS8-SYNC
LT1374CS8-5 SYNC
LT1374HVCS8
LT1374IS8
LT1374IS8-5
LT1374IS8-SYNC
LT1374IS8-5 SYNC
LT1374HVIS8
T
JMAX
= 125°C, θ
JA
= 30°C/ W
WITH PACKAGE SOLDERED TO 0.5 SQUARE INCH
COPPER AREA OVER BACKSIDE GROUND PLANE
OR INTERNAL POWER PLANE. θ
JA
CAN VARY
FROM 20°C/W TO >40°C/W DEPENDING ON
MOUNTING TECHNIQUES
ORDER
PART NUMBER
LT1374CR
LT1374CR-5
LT1374CR-SYNC
LT1374CR-5 SYNC
LT1374HVCR
LT1374IR
LT1374IR-5
LT1374IR-SYNC
LT1374IR-5 SYNC
LT1374HVIR
1374
13745
1374SN
3745SN
1374HV
1374I
1374I5
374ISN
74I5SN
374HVI
(Note 1)
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
ORDER
PART NUMBER
FE16 PACKAGE
16-LEAD PLASTIC TSSOP
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
GND
NC
V
IN
V
IN
BOOST
FB/SENSE
NC
GND
GND
V
SW
V
SW
SYNC
SHDN
V
C
BIAS
GND
T7 PACKAGE
7-LEAD PLASTIC TO-220
FB OR SENSE*
BOOST
V
IN
GND
V
SW
SHDN
V
C
FRONT VIEW
TAB IS
GND
7
6
5
4
3
2
1
T
JMAX
= 125°C, θ
JA
= 50°C/ W, θ
JC
= 4°C/ W
θ
JA
= 40°C/ W
EXPOSED PAD SOLDERED TO
GROUND PLANE
ORDER
PART NUMBER
LT1374CT7
LT1374CT7-5
LT1374IT7
LT1374IT7-5
LT1374CFE
LT1374IFE
LT1374HVCFE
LT1374HVIFE
*Default is the adjustable output voltage device with FB pin and shutdown function. Option -5 replaces FB with SENSE pin for fixed 5V output applications.
-SYNC replaces SHDN with SYNC pin for applications requiring synchronization. Consult LTC Marketing for parts specified with wider operating
temperature ranges.
ORDER
PART NUMBER
FE PART MARKING
1374CFE
1374IFE
1374HVCFE
1374HVIFE