LT3439_15 datasheet(2/12 Pages) LINER

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LT3439

sn3439 3439fs

(Note 1)

VIN Voltage ............................................................. 20V

COL A, COL B Voltage ............................................. 35V

SHDN, SYNC Voltage .............................................. 20V

Maximum Junction Temperature ......................... 150

°C

Operating Junction Temperature Range

(Note 2) ............................................ – 40

°C to 125°C

Storage Temperature Range ................ – 65

°C to 150°C

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

°C

ORDER PART

NUMBER

LT3439EFE

The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.

VIN = 5V; RT = 16.9k; CT = 680pF; RSL = 16.9k; COL A, COL B, SHDN pins open, unless otherwise noted.

TJMAX = 125°C, θJA = 40°C/ W

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

ELECTRICAL CHARACTERISTICS

FE PACKAGE

16-LEAD PLASTIC TSSOP

TOP VIEW

PGND

COL A

RSL

SYNC

PGND

COL B

VIN

SHDN

GND

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

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: The LT3439E is guaranteed to meet performance specifications

from 0

°C to 70°C. Specifications over the –40°C to 125°C operating

junction temperature range are assured by design, characterization and

correlation with statistical process controls.

NOTE: BACKSIDE OF PACKAGE CONNECTED TO GND

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Supply and Shutdown

VIN

Operating Range

2.8

17.5

VIN(MIN)

Minimum Input Voltage

2.55

2.7

IVIN

Supply Current

2.8V

≤ VIN ≤ 17.5V

IVIN(SHDN)

Supply Current in Shutdown Mode

2.8V

≤ VIN ≤ 17.5V, VSHDN = 0V

µA

VSHDN(ON)

Shutdown Turn-On Threshold

2.8V

≤ VIN ≤ 17.5V

1.3

1.4

VSHDN(OFF)

Shutdown Turn-Off Threshold

2.8V

≤ VIN ≤ 17.5V

1.20

1.26

ISHDN

Shutdown Pin Current Hysteresis

2.8V

≤ VIN ≤ 17.5V, VSHDN = 1.4V

µA

Oscillator and Sync

fMAX

Oscillator Frequency

250

kHz

fSYNC

Synchronization Frequency Range

300

kHz

VSYNC

SYNC Pin Threshold

1.4

2.25

RSYNC

SYNC Pin Input Resistance

Ω

Output Switches (COL A, COL B)

Switch Duty Cycle

Output Switch Breakdown Voltage

2.8V

≤ VIN ≤ 17.5V

RON

Output Switch On Resistance

ICOLA or ICOLB = 0.75A

0.5

0.95

Ω

ILIM(MAX)

Switch Current Limit

1.2

1.4

1.65

Slew Control

VSLEWR

Output Voltage Slew Rising Edge

Collector A or B

µs

VSLEWF

Output Voltage Slew Falling Edge

Collector A or B

µs

ISLEWR

Output Current Slew Rising Edge

Collector A or B

µs

ISLEWF

Output Current Slew Falling Edge

Collector A or B

µs

FE PART

MARKING

3439EFE

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