LT8705 Просмотр технического описания (PDF) - Linear Technology

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LT8705

80V VIN and VOUT Synchronous 4-Switch Buck Boost DC/DC Controller

Linear Technology 

LT8705

ABSOLUTE MAXIMUM RATINGS (Note 1)

VCSP-VCSN, VCSPIN-VCSNIN,

VCSPOUT-VCSNOUT...................................... –0.3V to 0.3V

SS, CLKOUT, CSP, CSN Voltage.................... –0.3V to 3V

VC Voltage (Note 2).................................... –0.3V to 2.2V

RT, LDO33, FBOUT Voltage........................... –0.3V to 5V

IMON_IN, IMON_OUT Voltage...................... –0.3V to 5V

SYNC Voltage............................................. –0.3V to 5.5V

INTVCC, GATEVCC Voltage............................. –0.3V to 7V

VBOOST1-VSW1, VBOOST2-VSW2...................... –0.3V to 7V

SWEN, MODE Voltage................................... –0.3V to 7V

SRVO_FBIN, SRVO_FBOUT Voltage............ –0.3V to 30V

SRVO_IIN, SRVO_IOUT Voltage.................. –0.3V to 30V

FBIN, SHDN Voltage.................................... –0.3V to 30V

CSNIN, CSPIN, CSPOUT, CSNOUT Voltage...–0.3V to 80V

VIN, EXTVCC Voltage................................... –0.3V to 80V

SW1, SW2 Voltage.......................................81V (Note 7)

BOOST1, BOOST2 Voltage.......................... –0.3V to 87V

BG1, BG2, TG1, TG2............................................ (Note 6)

Operating Junction Temperature Range

LT8705E (Notes 1, 3).......................... –40°C to 125°C

LT8705I (Notes 1, 3)........................... –40°C to 125°C

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

Lead Temperature (Soldering, 10 sec)

FE Package........................................................ 300°C

PIN CONFIGURATION

TOP VIEW

SHDN 1

CSN 2

CSP 3

LDO33 4

FBIN 5

FBOUT 6

IMON_OUT 7

VC 8

SS 9

CLKOUT 10

SYNC 11

RT 12

38 37 36 35 34 33 32

39

GND

13 14 15 16 17 18 19

31 CSPOUT

30 CSNOUT

29 EXTVCC

28 SRVO_FBOUT

27 SRVO_IOUT

26 SRVO_IIN

25 SRVO_FBIN

24 NC

23 BOOST1

22 TG1

21 SW1

20 NC

UHF PACKAGE

38-LEAD (5mm × 7mm) PLASTIC QFN

TJMAX = 125°C, θJA = 34°C/W

EXPOSED PAD (PIN 39) IS GND, MUST BE SOLDERED TO PCB

INTVCC 1

MODE 2

IMON_IN 3

SHDN 4

CSN 5

CSP 6

LDO33 7

FBIN 8

FBOUT 9

IMON_OUT 10

VC 11

SS 12

CLKOUT 13

SYNC 14

RT 15

GND 16

BG1 17

GATEVCC 18

BG2 19

TOP VIEW

39

GND

38 VIN

37 CSPIN

36 CSNIN

34 CSPOUT

32 CSNOUT

30 EXTVCC

28 BOOST1

26 TG1

24 SW1

22 SW2

21 TG2

20 BOOST2

FE PACKAGE

VARIATION: FE38(31)

38-LEAD PLASTIC TSSOP

TJMAX = 125°C, θJA = 25°C/W

EXPOSED PAD (PIN 39) IS GND, MUST BE SOLDERED TO PCB

8705p

2

For more information www.linear.com/8705

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