2

LT1374

1374fb

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

OR INTERNAL POWER 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

1374HVI

(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

*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