LT3489

2

3489f

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

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)

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

V

Maximum Operating Voltage

16

V

Feedback Voltage

●

1.22

1.21

1.235

1.26

1.26

V

V

FB Pin Bias Current

●

100

250

nA

Error Amp Transconductance

ΔI = 10μA

100

μmhos

Error Amp Voltage Gain

80

V/V

Quiescent Current

2

4

mA

Quiescent Current in Shutdown

0

1

μA

Reference Line Regulation

0.01

0.05

%

Switching Frequency

●

1.8

2

2.2

MHz

Maximum Switch Duty Cycle

●

85

90

%

Switch Current Limit

(Note 4)

●

2.5

3.5

5

A

0.23

V

Switch Leakage Current

0.01

1

μA

SHDN Pin Current

100

20

2

μA

μA

μA

SHDN Pin Threshold

0.3

1.5

2

V

Soft-Start Charging Current

5

10

20

μA

ELECTRICAL CHARACTERISTICS

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

1

2

3

4

FB

SHDN

GND

8

7

6

5

SS

COMP

SW

TOP VIEW

MS8E PACKAGE

8-LEAD PLASTIC MSOP

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.