LT1976_15 datasheet(2/28 Pages) LINER

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LT1976/LT1976B

1976bfg

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/

(Note 1)

VIN, SHDN, PG, BIAS .............................................. 60V

BOOST Pin Above SW ............................................ 35V

BOOST Pin Voltage ................................................. 68V

SYNC, CSS, PGFB, FB ................................................ 6V

Operating JunctionTemperature Range

LT1976EFE/LT1976BEFE (Note 2) ... – 40

°C to 125°C

LT1976IFE/LT1976BIFE (Note 2) ..... – 40

°C to 125°C

LT1976HFE (Note 2) ........................ – 40

°C to 140°C

Storage Temperature Range ................. – 65

°C to 150°C

Lead Temperature (Soldering, 10 sec).................. 300

°C

ORDER PART

NUMBER

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

LT1976EFE

LT1976IFE

LT1976HFE

LT1976BEFE

LT1976BIFE

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full –40°C to 125°C

operating temperature range, otherwise specifications are at TJ = 25

°C. VIN = 12V, SHDN = 12V, BOOST = 15.3V, BIAS = 5V,

FB/PGFB = 1.25V, CSS/SYNC = 0V unless otherwise noted.

θJA = 45°C/W, θJC(PAD) = 10°C/W

EXPOSED PAD IS GND (PIN 17)

MUST BE SOLDERED TO GND (PIN 8)

FE PACKAGE

16-LEAD PLASTIC TSSOP

TOP VIEW

VIN

BOOST

GND

SHDN

SYNC

PGFB

BIAS

CSS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VSHDN

SHDN Threshold

●

1.2

1.3

1.4

ISHDN

SHDN Input Current

SHDN = 12V

●

520

μA

Minimum Input Voltage (Note 3)

●

2.4

IVINS

Supply Shutdown Current

SHDN = 0V, BOOST = 0V, FB/PGFB = 0V

0.1

μA

Supply Sleep Current (Note 4) (LT1976)

BIAS = 0V, FB = 1.35V

●

170

230

μA

FB = 1.35V

●

μA

IVIN

Supply Quiescent Current

BIAS = 0V, FB = 1.15V, VC = 0.8V (VC = 0V LT1976B)

3.2

4.10

BIAS = 5V, FB = 1.15V, VC = 0.8V (VC = 0V LT1976B)

2.6

3.25

Minimum BIAS Voltage (Note 5)

●

2.7

IBIASS

BIAS Sleep Current (Note 4) (LT1976)

●

110

180

μA

IBIAS

BIAS Quiescent Current

SYNC = 3.3V

700

800

μA

Minimum Boost Voltage (Note 6)

ISW = 1.5A

1.8

2.5

Input Boost Current (Note 7)

ISW = 1.5A

VREF

Reference Voltage (VREF)

3.3V < VVIN < 60V

●

1.225

1.25

1.275

IFB

FB Input Bias Current

200

EA Voltage Gain (Note 8)

900

V/V

EA Voltage gm

dI(VC)= ±10μA

400

650

800

μMho

EA Source Current

FB = 1.15V

μA

EA Sink Current

FB = 1.35V

μA

VC to SW gm

3A/V

VC High Clamp

2.1

2.2

2.4

VC Switching Threshold (LT1976B)

●

0.1

0.4

0.8

FE PART MARKING

1976EFE

1976IFE

1976HFE

1976BEFE

1976BIFE

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