LT1185CT datasheet(2/16 Pages) LINER

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LT1185

BSOLUTEXI

GND

REF

VIN (CASE)

VOUT

K PACKAGE

4-LEAD TO-3 METAL CAN

BOTTOM VIEW

ORDER PART

NUMBER

LT1185MK

ORDER PART

NUMBER

LT1185CT

LT1185IT

θJC MAX = 2.5°C/W, θJA = 50°C/W

T PACKAGE

5-LEAD PLASTIC TO-220

REF

VOUT

VIN

GND

FRONT VIEW

TAB IS VIN

θJC MAX = 2.5°C/W, θJA = 35°C/W

PACKAGE/ORDER I FOR ATIO

(Note 1)

Input Voltage .......................................................... 35V

Input-Output Differential ......................................... 30V

FB Voltage ................................................................ 7V

REF Voltage .............................................................. 7V

Output Voltage ........................................................ 30V

Output Reverse Voltage ............................................ 2V

Operating Ambient Temperature Range

LT1185C ............................................... 0

°C to 70°C

LT1185M ......................................... – 55

°C to 125°C

Operating Junction Temperature Range*

Control Section

LT1185C ............................................. 0

°C to 125°C

LT1185I .......................................... – 40

°C to 125°C

LT1185M ........................................ – 55

°C to 150°C

Power Transistor Section

LT1185C ............................................. 0

°C to 150°C

LT1185I .......................................... – 40

°C to 150°C

LT1185M ........................................ – 55

°C to 175°C

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

°C to 150°C

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

°C

*See Application Section for details on calculating Operation Junction Temperature

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Reference Voltage (At FB Pin)

2.37

Reference Voltage Tolerance (At FB Pin) (Note 2)

VIN – VOUT = 5V, VOUT = VREF

0.3

±1%

1mA

≤ IOUT ≤ 3A

±2.5

VIN – VOUT = 1.2V to VIN = 30V

≤ 25W (Note 6), VOUT = 5V

TMIN ≤ TJ ≤ TMAX (Note 9)

Feedback Pin Bias Current

VOUT = VREF

0.7

µA

Droput Voltage (Note 3)

IOUT = 0.5A, VOUT = 5V

0.20

0.37

IOUT = 3A, VOUT = 5V

0.67

1.00

Load Regulation (Note 7)

IOUT = 5mA to 3A

0.05

0.3

VIN – VOUT = 1.5V to 10V, VOUT = 5V

Line Regulation (Note 7)

VIN – VOUT = 1V to 20V, VOUT = 5V

0.002

0.01

%/V

Minimum Input Voltage

IOUT = 1A (Note 4), VOUT = VREF

4.0

IOUT = 3A

4.3

Internal Current Limit (See Graph for

1.5V

≤ VIN – VOUT ≤ 10V

3.3

3.6

4.2

Guaranteed Curve) (Note 12)

3.1

4.4

VIN – VOUT = 15V

2.0

3.0

4.2

VIN – VOUT = 20V

1.0

1.7

2.6

VIN – VOUT = 30V

0.2

0.4

1.0

ELECTRICAL CHARACTERISTICS

The q denotes specifications which apply over the operating temperature range, otherwise specifications are at TA = 25°C.

Adjustable version, VIN = 7.4V, VOUT = 5V, IOUT = 1mA, RLIM = 4.02k, unless otherwise noted.

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