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LT3489

3489f

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

SW Voltage ................................................ –0.4V to 40V

FB, VC, COMP, SS Voltages .........................................6V

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

Current Into FB Pin ................................................±1mA

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

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

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

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

(Note 1)

The ● denotes the speciﬁcations which apply over the full operating

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

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LT3489E is guaranteed to meet performance speciﬁcations

from 0°C to 70°C. Speciﬁcations over the 40°C to 85°C operating

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Operating Voltage

2.4

2.6

Maximum Operating Voltage

Feedback Voltage

●

1.22

1.21

1.235

1.26

FB Pin Bias Current

VFB = 1.25V (Note 3)

●

100

250

Error Amp Transconductance

ΔI = 10μA

100

μmhos

Error Amp Voltage Gain

V/V

Quiescent Current

VSHDN = 2.5V, Not Switching

Quiescent Current in Shutdown

VSHDN = 0V, VIN = 3V

μA

Reference Line Regulation

2.6V ≤ VIN ≤ 16V

0.01

0.05

Switching Frequency

●

1.8

2.2

MHz

Maximum Switch Duty Cycle

●

Switch Current Limit

(Note 4)

●

2.5

3.5

Switch VCESAT

ISW = 2A

0.23

Switch Leakage Current

VSW = 5V

0.01

μA

SHDN Pin Current

VSHDN = 5V

VSHDN = 1.4V

VSHDN = 0V

100

μA

SHDN Pin Threshold

0.3

1.5

Soft-Start Charging Current

VSS = 0.5V

μA

ELECTRICAL CHARACTERISTICS

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

SHDN

GND

COMP

VIN

TOP VIEW

MS8E PACKAGE

8-LEAD PLASTIC MSOP

TJMAX = 125°C, θJA = 40°C/W, θJC = 10°C/W

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

ORDER PART NUMBER

MS8E PART MARKING

LT3489EMS8E

LTBYF

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.

temperature range are assured by design, characterization and correlation

with statistical process controls.

Note 3: Current ﬂows out of the FB pin.

Note 4: Current limit guaranteed by design and/or correlation to static test.

Current limit is independent of duty cycle and is guaranteed by design.

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