LT3571_15 datasheet(2/16 Pages) LINER

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LT3571

3571fa

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

Input Voltage (VIN), SHDN ........................................20V

VOUT, MONIN, APD....................................................75V

MON..........................................................................12V

SW ............................................................................75V

CTRL, FB, SYNC..........................................................5V

RT, VREF ...................................................................1.5V

Operating Ambient Temperature Range

(Note 2) .............................................–40°C to 125°C

Operating Junction Temperature

(Note 2) .............................................–40°C to 125°C

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

(Note 1)

15 14 13

TOP VIEW

UD PACKAGE

16-LEAD (3mm

3mm) PLASTIC QFN

APD

MONIN

VOUT

SHDN

VIN

GND

TJMAX = 125°C, θJA = 68°C/W, θJC = 4.2°C/W (NOTE 2)

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

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Operating Voltage

2.7

Maximum Operating Voltage

Supply Current

VFB = 1.3V, Not Switching

VSHDN = 0V

1.7

0.1

2.2

0.5

μA

Feedback Voltage

VCTRL = 1.25V, VOUT = VMONIN

0.985

0.97

1.015

1.03

Feedback Line Regulation

2.7V < VIN < 20V

0.03

0.07

%/V

Current Sense Voltage (VOUT – VMONIN)VOUT = 30V

185

200

215

FB Pin Bias Current

VFB = 0V

100

VREF Pin Voltage

IREF = –100μA

1.200

1.222

1.240

VREF Pin Line Regulation

2.7V < VIN < 20V

0.03

0.07

RT Voltage

SYNC Resistance to GND

VSYNC = 2V

kΩ

SYNC Input Low

0.4

SYNC Input High

1.5

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING*

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LT3571EUD#PBF

LT3571EUD#TRPBF

LDTN

16-Lead (3mm

× 3mm) Plastic QFN

–40°C to 125°C

LT3571IUD#PBF

LT3571IUD#TRPBF

LDTN

16-Lead (3mm

× 3mm) Plastic QFN

–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/

ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C, VIN = 3V, VSHDN = 3V, unless otherwise noted.

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