LT1371_15 datasheet(2/16 Pages) LINER

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LT1371

BSOLUTEXI

Supply Voltage ....................................................... 30V

Switch Voltage

LT1371 ............................................................... 35V

LT1371HV .......................................................... 42V

S/S, SHDN, SYNC Pin Voltage ................................ 30V

Feedback Pin Voltage (Transient, 10ms) ..............

±10V

Feedback Pin Current ........................................... 10mA

Negative Feedback Pin Voltage

(Transient, 10ms) .............................................

±10V

Operating Ambient Temperature Range ...... 0

°C to 70°C

Operating Junction Temperature Range

Commercial .......................................... 0

°C to 125°C

Industrial ......................................... – 40

°C to 125°C

Short Circuit ......................................... 0

°C to 150°C

Storage Temperature Range ................ – 65

°C to 150°C

Lead Temperature (Soldering, 10 sec) ................. 300

°C

ELECTRICAL C

HARA TERISTICS

VIN = 5V, VC = 0.6V, VFB = VREF, VSW, S/S, SHDN, SYNC and NFB pins open, unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VREF

Reference Voltage

Measured at Feedback Pin

1.230

1.245

1.260

VC = 0.8V

1.225

1.245

1.265

IFB

Feedback Input Current

VFB = VREF

250

550

900

Reference Voltage Line Regulation

2.7V

≤ VIN ≤ 25V, VC = 0.8V

0.01

0.03

%/V

PACKAGE/ORDER I FOR ATIO

TJMAX = 125°C, θJA = 30°C/W

R PACKAGE

7-LEAD PLASTIC DD

FRONT VIEW

TAB

GND

VIN

S/S

VSW

GND

NFB

ORDER PART

NUMBER

WITH PACKAGE SOLDERED TO 0.5 INCH2 COPPER

AREA OVER BACKSIDE GROUND PLANE OR INTERNAL

POWER PLANE.

θJA CAN VARY FROM 20°C/W TO

>40

°C/W DEPENDING ON MOUNTING TECHNIQUE

ORDER PART

NUMBER

T7 PACKAGE

7-LEAD TO-220

VIN

S/S

VSW

GND

NFB

FRONT VIEW

TAB

GND

TJMAX = 125°C, θJA = 50°C/W, θJC = 4°C/W

ORDER PART

NUMBER

TJMAX = 125°C, θJA = 50°C/W

θJA WILL VARY FROM APPROXIMATELY 40°C/W WITH

0.75 INCH2 OF 1 OZ COPPER TO 50

°C/W WITH 0.33 INCH2

OF 1 OZ COPPER ON A DOUBLE-SIDED BOARD

TOP VIEW

SW PACKAGE

20-LEAD PLASTIC SO WIDE

NFB

GND

SHDN

SYNC

VIN

VSW

GND

LT1371CR

LT1371HVCR

LT1371IR

LT1371HVIR

LT1371CT7

LT1371HVCT7

LT1371IT7

LT1371HVIT7

LT1371CSW

LT1371HVCSW

LT1371ISW

LT1371HVISW

Consult factory for Military grade parts.

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