LTC3708 datasheet(2/32 Pages) LINER

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LTC3708

3708fb

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

(Note 1)

32 31 30 29 28 27 26 25

10 11 12

TOP VIEW

UH PACKAGE

32-LEAD (5mm

5mm) PLASTIC QFN

13 14 15 16

RUN/SS

ITH1

VFB1

TRACK1

SGND

TRACK2

VFB2

ITH2

SENSE1–

PGND1

BG1

DRVCC

BG2

PGND2

SENSE2–

VCC

TJMAX = 125°C, θJA = 34°C/W

EXPOSED PAD (PIN 33) IS SGND, MUST BE SOLDERED TO PCB

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LTC3708EUH#PBF

LTC3708EUH#TRPBF

3708

32-Lead (5mm

× 5mm) Plastic QFN

–40°C to 85°C

LEAD BASED FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LTC3708EUH

LTC3708EUH#TR

3708

32-Lead (5mm

× 5mm) Plastic QFN

–40°C to 85°C

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

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/

Input Supply Voltage (VCC, DRVCC)............. 7V to –0.3V

Boosted Topside Driver Supply Voltage

BOOST1, 2 ............................................ 42V to –0.3V

Switch Voltage (SW1, 2) .............................. 36V to –5V

SENSE1+, SENSE2+ Voltages ....................... 36V to –5V

SENSE1–, SENSE2– Voltages .................... 10V to –0.3V

ION1, ION2 Voltages.................................... 21V to –0.3V

(BOOST – SW) Voltages .............................. 7V to –0.3V

RUN/SS, PGOOD Voltages .......................... 7V to –0.3V

PGOOD DC Current ................................................. 5mA

TRACK1, TRACK2 Voltages..............VCC + 0.3V to –0.3V

VRNG1, VRNG2 Voltages.................... VCC + 0.3V to –0.3V

ITH1, ITH2 Voltages.................................... 2.7V to –0.3V

VFB1, VFB2 Voltages .................................. 2.7V to –0.3V

INTLPF, EXTLPF Voltages ......................... 2.7V to –0.3V

FCB Voltages............................................... 7V to –0.3V

Operating Temperature Range (Note 5).... –40°C to 85°C

Junction Temperature (Note 2) ........................... 125°C

Storage Temperature Range................... –65°C to 125°C

Reﬂow Peak Body Temperature ........................... 260°C

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

temperature range, otherwise speciﬁcations are at TA = 25°C. VCC = 5V, DRVCC = 5V, unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Main Control Loop

Input DC Supply Current

Normal

Shutdown

2.4

250

400

μA

IFB1,2

Feedback Pin Input Current

ITH = 1.2V (Notes 3, 4)

–50

–100

VREF

Internal Reference Voltage

ITH = 1.2V, 0°C to 85°C (Notes 3, 4)

ITH = 1.2V (Notes 3, 4)

0.594

0.591

0.600

0.606

0.609

VFB1,2

Feedback Voltage

ITH = 1.2V (Note 3)

0.594

0.600

0.606

ΔVFB(LINEREG)1,2 Feedback Voltage Line Regulation

VCC = 4.5V to 6.5V (Note 3)

0.02

%/V

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