LT3574IMS datasheet(2/24 Pages) LINER

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LT3574

3574f

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)..................................................–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

LT3574EMS#PBF

LT3574EMS#TRPBF

3574

16-Lead Plastic MSOP

–40°C to 125°C

LT3574IMS#PBF

LT3574IMS#TRPBF

3574

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

0.65

0.9

1.1

Minimum Current Limit

VC = 0V

100

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

Error Amplifier Voltage Gain

VIN = 3V

150

V/V

pin conFiguration

GND

TEST

GND

VIN

BIAS

SHDN/UVLO

GND

RREF

RFB

RILIM

GND

TOP VIEW

MS PACKAGE

16-LEAD PLASTIC MSOP

TJMAX = 125°C, θJA = 120°C/W, θJC = 21°C/W

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