LTC3869 datasheet(2/46 Pages) LINER

2 / 46 page

LTC3875

3875fb

For more information www.linear.com/LTC3875

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

Input Supply Voltage (VIN)......................... 40V to –0.3V

Topside Driver Voltages

(BOOST1, BOOST2).................................... 46V to –0.3V

Switch Voltage (SW1, SW2).......................... 40V to –5V

INTVCC, RUN(s), PGOOD, EXTVCC

(BOOST-SW1), (BOOST2-SW2).................... 6V to –0.3V

SNSA+(s), SNSD+(s),

SNS–(s) Voltages ..................................INTVCC to –0.3V

(Note 1)

38 37 36 35 34 33 32 31

12 13 14 15

TOP VIEW

SGND/PGND

UJ PACKAGE

40-LEAD (6mm

× 6mm) PLASTIC QFN

16 17 18 19

TK/SS1

VOSNS1+

VOSNS1–

ITH1

ITH2

VOSNS2+

VOSNS2–

TK/SS2

SNSA2+

SNS2–

SW1

TG1

BOOST1

BG1

VIN

INTVCC

EXTVCC

BG2

BOOST2

TG2

TJMAX = 125°C, θJA = 33°C/W, θJC = 2.0°C/W

EXPOSED PAD (PIN 41) IS SGND/PGND, MUST BE SOLDERED TO PCB

MODE/PLLIN, ILIM, FREQ, IFAST, ENTMPB

VOSNS(s)+, VOSNS(s)– Voltages ...............INTVCC to –0.3V

ITH1, ITH2, PHASMD, TRSET1, TRSET2,

TCOMP1, TCOMP2, TAVG Voltages.......INTVCC to –0.3V

INTVCC Peak Output Current................................100mA

Operating Junction Temperature Range

(Notes 2, 3)............................................ –40°C to 125°C

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

38 37 36 35 34 33 32 31

12 13 14 15

TOP VIEW

SGND/PGND

UH PACKAGE

40-LEAD (5mm

× 5mm) PLASTIC QFN

16 17 18 19

TK/SS1

VOSNS1+

VOSNS1–

ITH1

ITH2

VOSNS2+

VOSNS2–

TK/SS2

SNSA2+

SNS2–

SW1

TG1

BOOST1

BG1

VIN

INTVCC

EXTVCC

BG2

BOOST2

TG2

TJMAX = 125°C, θJA = 44°C/W, θJC = 7.3°C/W

EXPOSED PAD (PIN 41) IS SGND/PGND, MUST BE SOLDERED TO PCB

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