LT3477_15 datasheet(2/20 Pages) LINER

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LT3477

3477fc

ABSOLUTE MAXIMUM RATINGS

SW Pin Voltage ........................................................ 42V

VIN, SHDN Pin Voltage ............................................. 25V

FBP, FBN Pin Voltage ................................................. 6V

VREF Pin Voltage......................................................... 6V

RT, VC, SS Pin Voltage ............................................... 6V

IADJ1, IADJ2 Pin Voltage ............................................ 25V

ISP1, ISP2, ISN1, ISN2 Pin Voltage ...............................42V

(Note 1)

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

Operating Temperature Range (Note 2)

LT3477E...............................................– 40°C to 85°C

LT3477I.............................................. –40°C to 125°C

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

Lead Temperature (Soldering, 10 sec)

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

The

● indicates speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C. VIN = 2.5V, VSHDN = 2.5V.

ELECTRICAL CHARACTERISTICS

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Input Voltage

2.3

2.5

Quiescent Current

VSHDN = 0V

VSHDN = 2.5V, VC = 0.3V (Not Switching)

0.1

5.0

1.0

7.5

μA

Reference Voltage

E Grade

I Grade

1.216

1.210

1.235

1.250

1.260

Reference Voltage Line Regulation

2.5V < VIN < 25V, VC = 0.3V

0.01

0.03

%/V

FE PACKAGE

20-LEAD PLASTIC TSSOP

TOP VIEW

VIN

SHDN

FBN

FBP

VREF

IADJ2

IADJ1

GND

ISN1

ISP1

ISN2

ISP2

TJMAX = 125°C, θJA = 40°C/W

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

20 19 18 17 16

TOP VIEW

UF PACKAGE

20-LEAD (4mm × 4mm) PLASTIC QFN

VIN

SHDN

ISP1

ISN2

ISP2

IADJ1

IADJ2

TJMAX = 125°C, θJA = 37°C/W

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

LEAD FREE FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LT3477EFE#PBF

LT3477EFE#TRPBF

20-Lead Plastic TSSOP

–40°C to 85°C

LT3477IFE#PBF

LT3477IFE#TRPBF

20-Lead Plastic TSSOP

–40°C to 125°C

LT3477EUF#PBF

LT3477EUF#TRPBF

3477

20-Lead (4mm

× 4mm) Plastic QFN

–40°C to 85°C

LT3477IUF#PBF

LT3477IUF#TRPBF

3477

20-Lead (4mm

× 4mm) Plastic QFN

–40°C to 125°C

Consult LTC Marketing for parts speciﬁed with wider operating temperature ranges.

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/

PIN CONFIGURATION

ORDER INFORMATION

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