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LT3471

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PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

(Note 1)

VIN Voltage................................................................16V

SW1, SW2 Voltage..................................... –0.4V to 42V

FB1N, FB1P, FB2N, FB2P Voltage......... 12V or VIN – 1.5V

SHDN/SS1, SHDN/SS2 Voltage ............................... 16V

VREF Voltage.............................................................1.5V

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

Operating Temperature Range (Note 2) ...– 40°C to 85°C

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

ELECTRICAL CHARACTERISTICS

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Operating Voltage

2.1

2.4

Reference Voltage

0.991

0.987

1.000

1.009

1.013

Reference Voltage Current Limit

(Note 3)

1.4

Reference Voltage Load Regulation

0mA ≤ IREF ≤ 100μA (Note 3)

0.1

0.2

%/100μA

Reference Voltage Line Regulation

2.6V ≤ VIN ≤ 16V

0.03

0.08

%/V

Error Ampliﬁer Offset

Transition from Not Switching to Switching, VFBP = VFBN = 1V

±2

±3

FB Pin Bias Current

VFB = 1V (Note 3)

100

Quiescent Current

VSHDN = 1.8V, Not Switching

2.5

Quiescent Current in Shutdown

VSHDN = 0.3V, VIN = 3V

0.01

μA

Switching Frequency

11.2

1.4

MHz

Maximum Duty Cycle

Minimum Duty Cycle

Switch Current Limit

At Minimum Duty Cycle

At Maximum Duty Cycle (Note 4)

1.5

0.9

2.05

1.45

2.6

2.0

Switch VCESAT

ISW = 0.5A (Note 5)

150

250

Switch Leakage Current

VSW = 5V

0.01

μA

SHDN/SS Input Voltage High

1.8

The

● denotes speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are TA = 25°C. VIN = VSHDN = 3V unless otherwise noted.

TOP VIEW

DD PACKAGE

10-LEAD (3mm × 3mm) PLASTIC DFN

SW1

SHDN/SS1

VIN

SHDN/SS2

SW2

FB1N

FB1P

VREF

FB2P

FB2N

TJMAX = 125°C, θJA = 43°C/ W, θJC = 3°C/W

EXPOSED PAD (PIN 11) IS GND MUST BE SOLDERED TO PCB

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LT3471EDD#PBF

LT3471EDD#TRPBF

LBHM

10-Lead (3mm × 3mm) Plastic DFN

–40°C to 85°C

LEAD BASED FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LT3471EDD

LT3471EDD#TR

LBHM

10-Lead (3mm × 3mm) Plastic DFN

–40°C to 85°C

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

For more information on lead free part marking, go to: http://www.linear.com/leadfree/

This product is only offered in trays. For more information go to: http://www.linear.com/packaging/

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