LT3494_15 datasheet(2/12 Pages) LINER

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LT3494/LT3494A

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ELECTRICAL CHARACTERISTICS

PACKAGE/ORDER INFORMATION

ABSOLUTE MAXIMUM RATINGS

VCC Voltage ...............................................................16V

SW Voltage ...............................................................40V

CAP Voltage ..............................................................40V

VOUT Voltage .............................................................40V

SHDN Voltage ...........................................................16V

CTRL Voltage ............................................................16V

FB Voltage................................................................2.5V

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

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

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

(Note 1)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Operating Voltage

2.3

2.5

Maximum Operating Voltage

Feedback Voltage

VCTRL = 3V (Note 3)

●

1.205

1.225

1.245

FB Resistor

●

179

182

184

Quiescent Current

Not Switching

μA

Quiescent Current in Shutdown

V⎯S⎯H⎯D⎯N = 0V, VCC = 3V

μA

Minimum Switch Off Time

After Start-Up Mode, VFB = 1V, VCTRL = 3V (Note 4)

During Start-Up Mode, VFB = 0.2V, VCTRL = 3V (Note 4)

100

450

Maximum Switch Off Time

VFB = 1.5V

●

μs

Switch Current Limit

LT3494A (Note 5)

LT3494 (Note 5)

225

115

350

180

450

250

Switch VCESAT

LT3494A, ISW = 200mA

LT3494, ISW = 100mA

180

110

Switch Leakage Current

VSW = 5V, V⎯S⎯H⎯D⎯N = 0

0.01

μA

Schottky Forward Voltage

IDIODE = 100mA

900

1100

Schottky Reverse Leakage

0.05

μA

PMOS Disconnect VCAP – VOUT

IOUT = 10mA, VCAP = 5V

250

SHDN Input Voltage High

1.5

SHDN Input Voltage Low

0.3

SHDN Pin Bias Current

VSHDN = 3V

VSHDN = 0V

0.1

μA

TOP VIEW

DDB PACKAGE

8-LEAD (3mm

× 2mm) PLASTIC DFN

GND

VCC

CTRL

CAP

VOUT

SHDN

TJMAX = 125°C, θJA = 76°C/W

EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB

ORDER PART NUMBER

DDB PART MARKING

LT3494EDDB

LT3494AEDDB

LCCD

LCRW

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/

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

The

● denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C. VCC = 3V, VSHDN = VCC, unless otherwise noted. (Note 2)

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