LTC3803-3 datasheet(2/20 Pages) LINER

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LT3798

3798f

PIN CONFIGURATION

ABSOLUTE MAXIMUM RATINGS

EN/UVLO...................................................................30V

VIN ............................................................................42V

INTVCC......................................................................12V

CTRL1, CTRL2, CTRL3................................................4V

FB, VREF, COMP+ ........................................................3V

VC, OVP, COMP– .........................................................4V

SENSE......................................................................0.4V

VIN_SENSE.................................................................1mA

DCM.......................................................................±3mA

Operating Temperature Range (Note 2)

LT3798E/LT3798I................................... –40°C to 125°C

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

(Note 1)

CTRL1

CTRL2

CTRL3

VREF

OVP

COMP+

COMP–

VIN_SENSE

SENSE

GATE

INTVCC

EN/UVLO

VIN

DCM

TOP VIEW

GND

MSE PACKAGE

16-LEAD PLASTIC MSOP

θJA = 50°C/W, θJC = 10°C/W

EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING*

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LT3798EMSE#PBF

LT3798EMSE#TRPBF

3798

16-Lead Plastic MSOP

–40°C to 125°C

LT3798IMSE#PBF

LT3798IMSE#TRPBF

3798

16-Lead Plastic MSOP

–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.

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/

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Voltage Range

VIN Quiescent Current

VEN/UVLO = 0.2V

VEN/UVLO = 1.5V, Not Switching

μA

VIN Quiescent Current, INTVCC Overdriven

VINTVCC = 11V

μA

VIN Shunt Regulator Voltage

I = 1mA

VIN Shunt Regulator Current Limit

8mA

INTVCC Quiescent Current

VEN/UVLO = 0.2V

VEN/UVLO = 1.5V, Not Switching

12.5

1.8

15.5

2.2

17.5

2.7

μA

EN/UVLO Pin Threshold

EN/UVLO Pin Voltage Rising

1.21

1.25

1.29

EN/UVLO Pin Hysteresis Current

EN/UVLO=1V

μA

VIN_SENSE Threshold

Turn Off

μA

VREF Voltage

0 μA Load

200μA Load

1.97

1.95

2.0

1.98

2.03

CTRL1/CTRL2/CTRL3 Pin Bias Current

CTLR1/CTRL2/CTRL3 = 1V

±30

ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 18V, INTVCC = 11V, unless otherwise noted.

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