LT3489 Ver la hoja de datos (PDF) - Linear Technology

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Fabricante

LT3489

2MHz Boost DC/DC Converter with 2.5A Switch and Soft-Start

Linear Technology 

LT3489

ABSOLUTE AXI U RATI GS

(Note 1)

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

UW U

PACKAGE/ORDER I FOR ATIO

TOP VIEW

VC 1

FB 2

SHDN 3

GND 4

8 SS

7 COMP

6 VIN

5 SW

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.

ELECTRICAL CHARACTERISTICS 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)

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

Minimum Operating Voltage

2.4

2.6

V

Maximum Operating Voltage

16

V

Feedback Voltage

1.22 1.235 1.26

V

● 1.21

1.26

V

FB Pin Bias Current

Error Amp Transconductance

VFB = 1.25V (Note 3)

ΔI = 10μA

●

100

250

nA

100

μmhos

Error Amp Voltage Gain

80

V/V

Quiescent Current

Quiescent Current in Shutdown

Reference Line Regulation

Switching Frequency

VSHDN = 2.5V, Not Switching

VSHDN = 0V, VIN = 3V

2.6V ≤ VIN ≤ 16V

2

4

mA

0

1

μA

0.01 0.05

%

● 1.8

2

2.2

MHz

Maximum Switch Duty Cycle

● 85

90

%

Switch Current Limit

(Note 4)

● 2.5

3.5

5

A

Switch VCESAT

Switch Leakage Current

SHDN Pin Current

SHDN Pin Threshold

ISW = 2A

VSW = 5V

VSHDN = 5V

VSHDN = 1.4V

VSHDN = 0V

0.23

V

0.01

1

μA

100

μA

20

μA

2

μA

0.3

1.5

2

V

Soft-Start Charging Current

VSS = 0.5V

5

10

20

μA

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

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.

3489f

2

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