LT3573_15 datasheet(2/26 Pages) LINER

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LT3573

3573fd

For more information www.linear.com/LT3573

ABSOLUTE MAXIMUM RATINGS

SW............................................................................60V

VIN, SHDN/UVLO, RFB, BIAS.....................................40V

SS, VC, TC, RREF, RILIM ...............................................5V

Maximum Junction Temperature .......................... 125°C

Operating Junction Temperature Range (Note 2)

LT3573E ............................................ –40°C to 125°C

Storage Temperature Range ..................–65°C to 150°C

ORDER INFORMATION

ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, unless otherwise noted.

LEAD FREE FINISH

TAPE AND REEL

PART MARKING*

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LT3573EMSE#PBF

LT3573EMSE#TRPBF

3573

16-Lead Plastic MSOP

–40°C to 125°C

LT3573IMSE#PBF

LT3573IMSE#TRPBF

3573

16-Lead Plastic MSOP

–40°C to 125°C

Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.

For more information on lead free part marking, go to: http://www.linear.com/leadfree/

For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Voltage Range

Quiescent Current

SS = 0V

VSHDN/UVLO = 0V

3.5

µA

Soft-Start Current

SS = 0.4V

µA

SHDN/UVLO Pin Threshold

UVLO Pin Voltage Rising

1.15

1.22

1.29

SHDN/UVLO Pin Hysteresis Current

VUVLO = 1V

2.5

µA

Soft-Start Threshold

0.7

Maximum Switching Frequency

1000

kHz

Switch Current Limit

RILIM = 10k

1.25

1.55

1.85

Minimum Current Limit

VC = 0V

200

Switch VCESAT

ISW = 0.5A

150

250

RREF Voltage

VIN = 3V

1.21

1.20

1.23

1.25

RREF Voltage Line Regulation

3V < VIN < 40V

0.01

0.03

%/ V

RREF Pin Bias Current

(Note 3)

100

600

IREF Reference Current

Measured at RFB Pin with RREF = 6.49k

190

µA

PIN CONFIGURATION

TOP VIEW

MSE PACKAGE

16-LEAD PLASTIC MSOP

GND

TEST

GND

VIN

BIAS

SHDN/UVLO

GND

RREF

RFB

RILIM

GND

θJA = 50°C/W, θJC = 10°C/W

EXPOSED PAD (PIN 17) IS GND, MUST BE CONNECTED TO GND

(Note 1)

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