LT3579 datasheet(4/40 Pages) LINER

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LT3579/LT3579-1

35791f

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 LT3579E is guaranteed to meet performance speciﬁcations

from 0°C to 125°C junction temperature. Speciﬁcations over the –40°C

to 125°C operating junction temperature range are assured by design,

characterization and correlation with statistical process controls. The

LT3579I is guaranteed over the full –40°C to 125°C operating junction

temperature range.

ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C. VIN = 5V, VSHDN = VIN, VFAULT = VIN unless otherwise noted. (Note 2).

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Soft-Start Charge Current

VSS = 30mV, Current Flows Out of SS pin

5.7

8.7

11.3

μA

Soft-Start Discharge Current

Part in FAULT

VSS = 2.1V,

Current Flows into SS Pin

5.7

8.7

11.3

μA

Soft-Start High Detection Voltage

Part in FAULT

1.65

1.8

1.95

Soft-Start Low Detection Voltage

Part Exiting FAULT

SHDN Minimum Input Voltage High

Active Mode, SHDN Rising

Active Mode, SHDN Falling

1.27

1.24

1.33

1.3

1.41

1.38

SHDN Input Voltage Low

Shutdown Mode

SHDN Pin Bias Current

VSHDN = 3V

VSHDN = 1.3V

VSHDN = 0V

9.5

11.4

13.4

0.1

μA

CLKOUT Output Voltage High

CCLKOUT = 50pF

1.9

2.1

2.3

CLKOUT Output Voltage Low

CCLKOUT = 50pF

100

200

CLKOUT Duty Cycle

LT3579, TJ = 25°C

LT3579-1, All TJ

CLKOUT Rise Time

CCLKOUT = 50pF

CLKOUT Fall Time

CCLKOUT = 50pF

GATE Pull Down Current

VGATE = 3V

VGATE = 80V

800

933

1100

μA

GATE Leakage Current

VGATE = 50V, GATE Off

0.01

μA

FAULT Output Voltage Low

100μA into FAULT Pin

150

300

FAULT Leakage Current

VFAULT = 40V, FAULT Off

0.01

μA

FAULT Input Voltage Low Threshold

700

750

800

FAULT Input Voltage High Threshold

950

1000

1050

Note 3: Current limit guaranteed by design and/or correlation to static test.

Note 4: This IC includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperature will exceed 125°C when overtemperature protection is active.

Continuous operation over the speciﬁed maximum operating junction

temperature may impair device reliability.

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