LT3477EUF datasheet(2/20 Pages) LINER

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LT3477

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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

ABSOLUTE MAXIMUM RATINGS (Note 1)

PACKAGE/ORDER INFORMATION

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

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Input Voltage

●

2.3

2.5

Quiescent Current

VSHDN = 0V

0.1

1.0

µA

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

5.0

7.5

Reference Voltage

E Grade

●

1.216

1.235

1.250

I Grade

●

1.210

1.235

1.260

Reference Voltage Line Regulation

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

0.01

0.03

%/V

Maximum VREF Pin Current

Out of Pin

100

µA

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

TJMAX = 125°C, θJA = 37°C/W

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

TJMAX = 150°C, θJA = 40°C/W

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

FE PACKAGE

20-LEAD PLASTIC TSSOP

TOP VIEW

VIN

SHDN

FBN

FBP

VREF

IADJ2

IADJ1

GND

ISN1

ISP1

ISN2

ISP2

20 19 18 17 16

TOP VIEW

UF PACKAGE

20-LEAD (4mm

× 4mm) PLASTIC QFN

VIN

SHDN

ISP1

ISN2

ISP2

IADJ1

IADJ2

LT3477EFE

LT3477IFE

ORDER PART NUMBER

LT3477EUF

LT3477IUF

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

UF PART MARKING

ORDER PART NUMBER

SW PART MARKING

Order Options Tape and Reel: Add #TR

Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF

Lead Free Part Marking: http://www.linear.com/leadfree/

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