LTC7878

2

Rev. 0

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PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

Input and Output Voltage (VIN, VOUT) ........ –0.3V to 72V

Topside Driver Voltages

(BOOST1, BOOST2).................................... –0.3V to 78V

Switch Voltages (SW1, SW2)........................ –5V to 72V

(BOOST1 – SW1), (BOOST2 – SW2)............ –0.3V to 8V

Inductor Current Sense Voltages

(ISNSP, ISNSN, ISNSD).................................. –5V to72V

Input/Output Current Sense Voltages

(CSP, CSN)................................................. –0.3V to 72V

EXTVCC Voltage ......................................... –0.3V to 72V

RUN Voltage................................................–0.3V to 12V

PGOOD Voltage............................................ –0.3V to 6V

ITH, ITHB, VFB Voltages........................–0.3V to INTVCC

PHASMD, SETCUR, SS Voltages...........–0.3V to INTVCC

FREQ, SYNC, CLKOUT Voltages............–0.3V to INTVCC

MODE/ILIM Voltage ..............................–0.3V to INTVCC

DRVCC Peak Current (Note 10).............................100mA

TG1, BG1, TG2, BG2........................................... (Note 9)

Operating Junction Temperature Range (Notes 2, 3)

LTC7878A .......................................... –40°C to 125°C

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

(Note 1)

32

33

SGND

31 30 29 28 27 26 25

9 10 11 12

TOP VIEW

UH PACKAGE

32-LEAD (5mm × 5mm) PLASTIC QFN

TJMAX = 125°C, θJA = 34°C/W

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

13 14 15 16

17

18

19

20

21

22

23

24

8

7

6

5

4

3

2

1

BG1

VIN

DRVCC

EXTVCC

INTVCC

RUN

PGND

BG2

CSN

CSP

SETCUR

SYNC

CLKOUT

FREQ

PHASMD

MODE/ILIM

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING*

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LTC7878AUH#PBF

LTC7878AUH#TRPBF

LTC7878

32-Lead (5mm × 5mm) Plastic QFN

–40°C to 125°C

Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.

Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.