LT3493

3

3493fb

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 LT3493E is guaranteed to meet performance specifications

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

temperature range are assured by design, characterization and correlation

with statistical process controls. The LT3493I specifications are

guaranteed over the –40°C to 125°C temperature range.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Switch Current Limit

(Note 3)

1.4

1.75

2.2

A

330

mV

Switch Leakage Current

2μA

Minimum Boost Voltage Above Switch

1.85

2.2

V

BOOST Pin Current

30

50

mA

SHDN Input Voltage High

2.3

V

SHDN Input Voltage Low

0.3

V

SHDN Bias Current

6

0.01

15

0.1

μA

μA

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

Slope compensation reduces current limit at higher duty cycle.

Note 4: Current flows out of pin.

Note 5: Current flows into pin.

LOAD CURRENT (A)

0

50

55

65

70

75

0.8

1.0

95

3493 G01

60

0.2

0.4

0.6

1.2

80

85

90

LOAD CURRENT (A)

0

50

55

65

70

75

0.8

1.0

3493 G02

60

0.2

0.4

0.6

1.2

80

85

90

LOAD CURRENT (A)

0

50

55

65

70

75

0.8

1.0

3493 G03

60

0.2

0.4

0.6

1.2

80