LT3570_15 datasheet(2/20 Pages) LINER

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LT3570

3570fb

ABSOLUTE MAXIMUM RATINGS

VIN1, VIN2, VIN3, VBIAS Voltage ..................................40V

BOOST Voltage .........................................................60V

BOOST Pin Above SW2.............................................25V

NPN_DRV Voltage.......................................................8V

SW1 Voltage .............................................................40V

SHDN1, SHDN2, SHDN3 Voltage ..............................40V

SYNC, RT Voltage........................................................3V

SS1, SS2 Voltage........................................................3V

FB1, FB2, FB3 Voltage...............................................10V

(Note 1)

VC1, VC2 Voltage..........................................................3V

Maximum Junction Temperature........................... 125°C

Operating Temperature Range (Note 2).. –40°C to 125°C

Storage Temperature Range

TSSOP ............................................... –65°C to 150°C

QFN.................................................... –65°C to 125°C

Lead Temperature (Soldering, 10 sec)

TSSOP Only ...................................................... 300°C

24 23 22 21 20 19

TOP VIEW

UF PACKAGE

24-LEAD (4mm

4mm) PLASTIC QFN

10 11 12

VIN2

SW2

SW1

GND

VC2

SS2

GND

SYNC

SHDN3

TJMAX = 125°C, θJA = 37°C/W

EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB

FE PACKAGE

20-LEAD PLASTIC TSSOP

TOP VIEW

FB1

SHDN1

SHDN2

SHDN3

SYNC

SS2

VC2

FB2

FB3

VC1

SS1

VIN1

GND

SW1

SW2

VIN2

BOOST

VIN3

NPN_DRV

TJMAX = 125°C, θJA = 38°C/W

EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB

PIN CONFIGURATION

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING*

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LT3570EUF#PBF

LT3570EUF#TRPBF

3570

24-Lead (4mm

× 4mm) Plastic QFN

–40°C to 125°C

LT3570IUF#PBF

LT3570IUF#TRPBF

3570

24-Lead (4mm

× 4mm) Plastic QFN

–40°C to 125°C

LT3570EFE#PBF

LT3570EFE#TRPBF

LT3570FE

20-Lead Plastic TSSOP

–40°C to 125°C

LT3570IFE#PBF

LT3570IFE#TRPBF

LT3570FE

20-Lead Plastic TSSOP

–40°C to 125°C

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

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/

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