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

GND

SYNC OR SHDN*

7

6

5

4

3

2

1

1

2

3

4

8

7

6

5

TOP VIEW

S8 PACKAGE

8-LEAD PLASTIC SO

BOOST

FGND

BIAS

SYNC

OR SHDN*

FB OR

SENSE*

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

WITH PACKAGE SOLDERED TO 0.5 SQUARE INCH

COPPER AREA OVER BACKSIDE GROUND PLANE

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

PACKAGE/ORDER I FOR ATIO

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

BOOST

FB/SENSE

NC

GND

GND

SYNC

SHDN

BIAS

GND

T7 PACKAGE

7-LEAD PLASTIC TO-220

FB OR SENSE*

BOOST

GND

SHDN

FRONT VIEW

TAB IS

GND

7

6

5

4

3

2

1

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