LT3688

2

3688f

ABSOLUTE MAXIMUM RATINGS

BST Voltage ..............................................................55V

BST above SW Voltage .............................................30V

BIAS Voltage .............................................................30V

WDE, WDI, RST, WDO Voltage ...................................6V

FB, RT, SYNC, RUN/SS Voltage ..................................6V

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TOP VIEW

FE PACKAGE

24-LEAD PLASTIC TSSOP

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FB1

RUN/SS1

BST1

SW1

DA1

CONFIG

DA2

SW2

BST2

RUN/SS2

FB2

EN/UVLO

SYNC

RT

BIAS

WDI

WDE

WDO

RST1

RST2

25

GND

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

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TOP VIEW

UF PACKAGE

24-LEAD (4mm

× 4mm) PLASTIC QFN

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RT

SYNC

EN/UVLO

FB1

RUN/SS1

BST1

WDO

RST1

RST2

FB2

RUN/SS2

BST2

25

GND

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

PIN CONFIGURATION

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING*

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LT3688EFE#PBF

LT3688EFE#TRPBF

LT3688FE

24-Lead Plastic TSSOP

–40°C to 125°C

LT3688IFE#PBF

LT3688IFE#TRPBF

LT3688FE

24-Lead Plastic TSSOP

–40°C to 125°C

LT3688HFE#PBF

LT3688HFE#TRPBF

LT3688FE

24-Lead Plastic TSSOP

–40°C to 150°C

LT3688EUF#PBF

LT3688EUF#TRPBF

3688

24-Lead (4mm

× 4mm) Plastic QFN

–40°C to 125°C

LT3688IUF#PBF

LT3688IUF#TRPBF

3688

24-Lead (4mm

× 4mm) Plastic QFN

–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.

(Note 1)

Operating Junction Temperature Range (Note 3)

LT3688E, LT3688I ..............................–40°C to 125°C

LT3688H ............................................–40°C to 150°C

Maximum Junction Temperature

LT3688E, LT3688I ............................................. 125°C

LT3688H ........................................................... 150°C

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

Lead Temperature (Soldering, 10 sec)

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