LT3504_15 datasheet(2/24 Pages) LINER

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LT3504

3504fa

For more information www.linear.com/LT3504

pin conFiguraTion

absoluTe MaxiMuM raTings

EN/UVLO Pin.............................................................40V

EN/UVLO Pin Above VIN Pin........................................5V

VIN Pin ......................................................................40V

SKY Pin.....................................................................46V

SW5 Pin....................................................................47V

RUN/SS Pins...............................................................6V

FB Pins........................................................................6V

RT/SYNC Pin...............................................................6V

PG Pin.......................................................................25V

Operating Junction Temperature Range (Notes 2, 8)

LT3504EUFD.......................................... –40°C to 125°C

LT3504IUFD........................................... –40°C to 125°C

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

(Note 1)

9 10

TOP VIEW

UFD PACKAGE

28-LEAD (4mm

× 5mm) PLASTIC QFN

GND

11 12 13

28 27 26 25 24

DA2

SW2

DA3

SW3

SW1

DA1

SW4

DA4

FB2

FB3

FB1

FB4

GND

RT/SYNC

EN/UVLO

RUN/SS3

θJA = 43°C/W

EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB

orDer inForMaTion

LEAD FREE FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LT3504EUFD#PBF

LT3504EUFD#TRPBF

3504

28-Lead (4mm × 5mm) Plastic QFN

–40°C to 125°C

LT3504IUFD#PBF

LT3504IUFD#TRPBF

3504

28-Lead (4mm × 5mm) Plastic QFN

–40°C to 125°C

Consult LTC Marketing for parts specified with wider operating temperature ranges.

Consult LTC Marketing for information on non-standard lead based finish parts.

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

denotes the specifications which apply over the full operating

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

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

EN/UVLO Threshold Voltage

Rising

1.2

1.44

1.6

EN/UVLO Threshold Voltage Hysteresis

110

EN/UVLO Threshold Current Hysteresis

VEN/UVLO = Measured Rising Threshold – 50mV

(Note 3)

1.3

µA

Internal VIN Undervoltage Lockout

2.4

2.9

3.2

Quiescent Current (VIN) in Shutdown

VEN/UVLO = 0V

0.01

µA

Quiescent Current (VIN)

VEN/UVLO = 1V (Note 4)

µA

Quiescent Current (VIN)

VEN/UVLO = 1.5V, VRUN/SS(1,2,3,4) = Open,

VFB(1,2,3,4) = 0.9V, VSKY = 17V

2.7

Quiescent Current (SKY)

VEN/UVLO = 1.5V, VRUN/SS(1,2,3,4) = Open,

VFB(1,2,3,4) = 0.9V, VSKY = 17V

4.4

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